** Official ** Gigabyte UD3 P45 Series -- EP45-UD3 / EP45-UD3R / EP45-UD3P

**Dark-Energy** · 04-25-2009, 09:22 PM

Originally Posted by Jsunn

Hello All,

I posted a few days ago but didn't get a respose.

Here is my system:
BIOS: F9
GA-EP45-UD3P rev 1.0

E8500 E0 Stepping @ 4.105GHz 1.40625v
PC2-8800 RAM 5-5-5-15 @ 1159MHz

I am trying to optimize my O/C, but if I try to lower my vCore I get a BSOD. Below is my Template:

I idle around 35degC with an internal case temp of 24degC.

The peak I have seen is ~71ish degC during Intel BurnIn test (linpack) and only about ~64-65degC with Prime95 Small FFT.

Can you help me to get a cooler running chip?

Thanks,
-Jsunn

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz..........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[400ps]
MCH Clock Skew..........................[300ps]

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333     ]
System Memory Multipler.........................[ 2.40B   ]
Memory Frequency 1066...........................[ 1159    ]
DRAM Timing Selectable..........................[ Manual  ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.40625v]
CPU Termination   [ 1.20    ]...................[ 1.40v   ]
CPU PLL           [ 1.50    ]...................[ 1.610v  ]
CPU Reference     [ 0.760   ]...................[ .956v   ]
 
MCH Core          [ 1.100   ]...................[ 1.360v  ]
MCH Reference     [ 0.760   ]...................[ 0.866v  ]
MCH/DRAM Reference [ 0.900   ]..................[ 1.11v   ]
ICH I/O           [ 1.500   ]...................[ auto    ]
ICH Core          [ 1.100   ]...................[ auto    ]

DRAM Voltage     [ 1.800v]...................[1.900v]
DRAM Termination [0.900v]...................[auto]
Channel A Reference [0.900v]................[auto]
Channel B Reference [0.900v]................[auto]

Clock skews seem a bit high, especially for a dual. Try lowering one or both of them. Lower or up your cpu reference, and your VTT is too much, 1.28-1.30 is plenty, or you're doing something wrong. MCH Reference is picky on these boards too so try changing that around. Not all boards are the same though.

And set your VTT to 1.2 and your CPU reference to .760 and MCH reference to .70, then raise your VTT back up and it should scale. Good luck

**coop** · 04-25-2009, 11:04 PM

266 strap 2.50A (4:5) 9X500 Hard compared to other ratios. Req. mch of 1.4v. Only 1m stable, and that was with 500. 5:6 I could do 32m at 530 with only 1.36vmch. http://www.xtremesystems.org/forums/showpost.php?p=3744588&postcount=2950
[IMG]

[/IMG]

**Jsunn** · 04-26-2009, 07:28 AM

Dark-Energy,

I made some tweaks based on your last comments. The numbers out side the [ ] are the OLD values....

I was able to boot without a problem. I am doing stability testing now. do you have a suggestion(s) on what I can do if things are stable?

What would be my next step???

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz...........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[300ps]  400
MCH Clock Skew..........................[200ps]  300

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]
System Memory Multipler.........................[ 2.40B    ]
Memory Frequency 1066...........................[ 1159     ]
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.40625v]
CPU Termination   [ 1.20    ]...................[ 1.30v   ]  1.40
CPU PLL           [ 1.50    ]...................[ 1.610v  ]
CPU Reference     [ 0.760   ]...................[ 0.823v  ]  0.956
 
MCH Core          [ 1.100   ]...................[ 1.360v  ]
MCH Reference     [ 0.760   ]...................[ 0.763v  ]  0.866
MCH/DRAM Reference [ 0.900   ]..................[ 1.16v   ]  1.11
ICH I/O           [ 1.500   ]...................[ auto    ]
ICH Core          [ 1.100   ]...................[ auto    ]

DRAM Voltage     [ 1.800v]...................[2.000v]
DRAM Termination [0.900v]...................[auto]
Channel A Reference [0.900v]................[auto]
Channel B Reference [0.900v]................[auto]

**Dark-Energy** · 04-26-2009, 08:51 AM

Ahh good...um I'm not really sure where to go. Those references are good base points to start out as duals like lower MCH references (as I learned a few pages back) and they don't really need cpu reference tweaking. If all is stable just lower the vcore until it becomes unstable. Honestly there's not really much you can do if you can't get it stable at a lower voltage other that adjusting the cpu reference. Hopefully you don't just have a weak chip. Sure it's not a C0 stepping?

**Jsunn** · 04-26-2009, 08:58 AM

Dark Energy,

Thanks for the info! It is definitly E0 stepping, everything I has says that including CPU-Z. After I do some more testing I will see if I can lower the vCore.

Prime was good for a short run, I am trying MemTest now as I am running my Ram at 2.0v and 1159MHz. I got a mem error at 118% scan with 1.9 volts so I am trying to see if upping to 2.0 fixes that. We'll see.

Thanks,
Jason

**phsinc1** · 04-26-2009, 09:05 AM

I tried bios F9 and there is some improvements over my old F7
1- 2.00B divider is working
2- when your unplug power from your PC(this thing only happen after your remove power cord for example), if you power on, PC will boot first time, but older bios, when your power on PC, it will open and shutdown and open again, but with the new bios F9 it power on first time

**Jsunn** · 04-26-2009, 10:27 AM

**UPDATE**

I am gradually reducing the vCore. I am seeing better temps, mid to upper 50s during prime95 small FFT. I am sitting at 1.375 vCore in the BIOS and 1.34 in Windows. Here are my settings.

I am testing with Prime95 now.

Are there other settings I should be aware of as I lower my vCore?

Thanks,
-Jsunn

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz...........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[300ps]  
MCH Clock Skew..........................[200ps]  

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]
System Memory Multipler.........................[ 2.40B    ]
Memory Frequency 1066...........................[ 1159     ]
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.3750v ]  1.40625v
CPU Termination   [ 1.20    ]...................[ 1.30v   ]  
CPU PLL           [ 1.50    ]...................[ 1.610v  ]
CPU Reference     [ 0.760   ]...................[ 0.823v  ]  
 
MCH Core          [ 1.100   ]...................[ 1.360v  ]
MCH Reference     [ 0.760   ]...................[ 0.763v  ]  
MCH/DRAM Reference [ 0.900   ]..................[ 1.16v   ]  
ICH I/O           [ 1.500   ]...................[ auto    ]
ICH Core          [ 1.100   ]...................[ auto    ]

DRAM Voltage     [ 1.800v]...................[2.000v]
DRAM Termination [0.900v]....................[auto]
Channel A Reference [0.900v].................[auto]
Channel B Reference [0.900v].................[auto]

**phsinc1** · 04-26-2009, 10:44 AM

Originally Posted by Jsunn

**UPDATE**

I am gradually reducing the vCore. I am seeing better temps, mid to upper 50s during prime95 small FFT. I am sitting at 1.375 vCore in the BIOS and 1.34 in Windows. Here are my settings.

I am testing with Prime95 now.

Are there other settings I should be aware of as I lower my vCore?

Thanks,
-Jsunn

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz...........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[300ps]  
MCH Clock Skew..........................[200ps]  

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]
System Memory Multipler.........................[ 2.40B    ]
Memory Frequency 1066...........................[ 1159     ]
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.3750v ]  1.40625v
CPU Termination   [ 1.20    ]...................[ 1.30v   ]  
CPU PLL           [ 1.50    ]...................[ 1.610v  ]
CPU Reference     [ 0.760   ]...................[ 0.823v  ]  
 
MCH Core          [ 1.100   ]...................[ 1.360v  ]
MCH Reference     [ 0.760   ]...................[ 0.763v  ]  
MCH/DRAM Reference [ 0.900   ]..................[ 1.16v   ]  
ICH I/O           [ 1.500   ]...................[ auto    ]
ICH Core          [ 1.100   ]...................[ auto    ]

DRAM Voltage     [ 1.800v]...................[2.000v]
DRAM Termination [0.900v]....................[auto]
Channel A Reference [0.900v].................[auto]
Channel B Reference [0.900v].................[auto]

Try to bump your CPU termination to 1.32v ~ 1.34v, 1.30v is a little low for 483

**sparkison** · 04-26-2009, 11:42 AM

Originally Posted by OC Nub

I have bacth# L832B701, also an EO. This is my template for 4.0ghz, 9hrs. Prime Blend stable, LinX stable. Used PL8. VID on this chip is 1.2125v

Code:

 Robust Graphics Booster [Auto]
CPU Clock Ratio[8]
Fine CPU Clock Ratio [.5]

**********Clock Chip Control*************************

CPU Host Clock Control [Enable]
CPU Host Frequency (Mhz) [471]
PCI Express Frequency (Mhz) [100]
C.I.A 2 [Disable]

*********Advanced Clock Control**********************

CPU Clock Drive [800mV]
PCI Express Clock Drive [900mV]
CPU Clock Skew [0ps]
MCH Clock Skew [0ps]

**********DRAM Performance Control***********

Performance Enhance [Standard]
Extreme Memory Profile (XMP) [Disabled]
(G) MCH Frequency Latch [Auto]
System Memory Multipler [2.40b]
Memory Frequency [1130 Mhz]
DRAM Timing Selectable [Manual]

CAS Latency Time [5]
tRCD [5]
tRP [5]
tRAS [15]

*******Advanced Timing Control***********

tRRD [Auto/Default]
tWTR [Auto/Default]
tWR [Auto/Default]
tRFC [Auto/Default]
tRTP [Auto/Default]
Command Rate (cmd) [Auto/Default]


***********Motherboard Voltage Control*******

Load-Line Calibration [Enabled]
CPU Vcore [1.25625v]
CPU Termination [1.280v]
CPU PLL [1.45v]
CPU Reference [.835]

MCH Core [1.30v]
MCH Reference [.850]
MCH/DRAM Refernce [Normal]
ICH I/O [Normal]
ICH Core [Normal]

DRAM Voltage [2.10v]
DRAM Termination [Normal]
Channel A Ref [Normal]
Channel B Ref [Normal]

Thanks for the info OC NUB!
My batch number is: L835B131
just a bit new than yours it looks like, hopefully I will have as much success as you; still haven't had a chance to run prime any longer so we'll see how it goes.

I did manage to lower the vcore a bit though and keep it just as stable, now at 1.30v set, 1.28v actual.

Will keep you guys posted on results

**Jsunn** · 04-26-2009, 12:10 PM

Alright,

I have lowered the vCore to 1.33750v that gives me 1.31v in windows. after 10 runs of linpack, mu max temp is 67deg C.

Now if I go any lower in the BIOS, I think that my vCore will drop below the 1.3 that I have set for VTT? Do I need to worry about that? How do these relate to each other?

Do I need to be concerned about this? Is there an ideal spread between VTT and vCore?

Next steps?

Thanks,
-J

-Jsunn

**Jsunn** · 04-26-2009, 02:53 PM

I ran Prime 95 and 57 minutes into the test I got an error on core 2.

That thread stopped and it stated 57 threads in 57 minutes 1 error, 0 warnings.

I went back into the BIOS and loosened my timings on my memory to 6-6-6-20.

I just got done running LinPakc 15 cycles without error...

This was just a guess on my part to see if I could get that error to "go away".
I did up my VTT to 1.32v as phsinc1 suggested.

My template is listed below.
I think I am really close to having a very stable system!

Are there other settings that I could adjust to make sure I am stable?

Thanks for your help!
-Jsunn

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz...........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[300ps]  
MCH Clock Skew..........................[200ps]  

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]
System Memory Multipler.........................[ 2.40B    ]
Memory Frequency 1066...........................[ 1159     ]
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 6       ]
tRCD............................................[ 6       ]
tRP.............................................[ 6       ]
tRAS............................................[ 20      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.3375v ]  
CPU Termination   [ 1.20    ]...................[ 1.32v   ]  1.3
CPU PLL           [ 1.50    ]...................[ 1.610v  ]
CPU Reference     [ 0.760   ]...................[ 0.823v  ]  
 
MCH Core          [ 1.100   ]...................[ 1.360v  ]
MCH Reference     [ 0.760   ]...................[ 0.763v  ]  
MCH/DRAM Reference [ 0.900   ]..................[ 1.16v   ]  
ICH I/O           [ 1.500   ]...................[ auto    ]
ICH Core          [ 1.100   ]...................[ auto    ]

DRAM Voltage     [ 1.800v]...................[2.000v]
DRAM Termination [0.900v]....................[auto]
Channel A Reference [0.900v].................[auto]
Channel B Reference [0.900v].................[auto]

**pphx459** · 04-26-2009, 03:10 PM

Originally Posted by radaja

why do you want to run them both together?just curious

Just thought it would be faster in testing stability and adjusting settings. For example, prime will fail after 8 or 9 hours, I was thinking of giving it a heavier load to see the errors faster. Not sure why it won't work, it could be windows 7 beta?? If you don't mind, for the hell of it, can you try to run both apps on a stable setup? As for now, I've given up

**Brad8988** · 04-26-2009, 03:15 PM

Looking to buy one of these boards in the next week or 2, Probably the GA-EP45T-UD3P. Iv read alittle of this massive thread and seen some memory causing issues. As i haven't bought the ram yet what would be the best 1600mhz 2x2gb kit to go with?

**Dark-Energy** · 04-26-2009, 03:36 PM

Originally Posted by Jsunn

Dark Energy,

Thanks for the info! It is definitly E0 stepping, everything I has says that including CPU-Z. After I do some more testing I will see if I can lower the vCore.

Prime was good for a short run, I am trying MemTest now as I am running my Ram at 2.0v and 1159MHz. I got a mem error at 118% scan with 1.9 volts so I am trying to see if upping to 2.0 fixes that. We'll see.

Thanks,
Jason

Hey sorry for the delay, I had spent the last 4 hours lapping my CPU and heatsink. Don't worry about the VTT and voltage, my VTT is at 1.26 and has no effect when I up my vcore past it. One more thing you should know that might help you is clock skews again. I would experiment with them and try putting them at 0ps for both and see if that helps you lower your vcore. Also experiment with CPU reference up and down and see if it helps lowering them. There does come a point where it's impossible to lower it anymore and 1.3 might just be around that, or 1.31 just to be sure.

If you still aren't happy with temps (max load temp I would go is 65c), I would suggest lapping the heatsink and processor like I did, and try reapplying thermal paste and adjusting some fan speeds. Whatever helps. Remember lapping voids your warranty.

**Loco23** · 04-26-2009, 04:06 PM

1159MHz is too much for your memory. Change this in your settings:
CPU Clock Skew - 0ps
MCH Clock Skew - 0ps
System Memory Multipler - 2.00B
CAS Latency Time - 5
tRCD - 5
tRP - 5
tRAS - 15
CPU Termination - 1.3
CPU PLL - 1.5
CPU Reference - 0.823
MCH Core - 1.34
MCH Reference - 0.823 or one step up
MCH/DRAM Reference - auto
ICH I/O - 1.5
ICH Core - 1.1

Use linpack for test CPU and prime(blend) for test NB+Memory. If prime fail in a few minutes try up MCH Ref.

**Jsunn** · 04-26-2009, 04:54 PM

Loco I followed you recomendations as closely as I could.

I received the following message about 10 minutes into Prime95 Small FFT.

FFT length 8K.
[Apr 26 18:48] FATAL ERROR: Rounding was 0.5, expected less than 0.4
[Apr 26 18:48] Hardware failure detected, consult stress.txt file.
[Apr 26 18:48] Torture Test completed 11 tests in 10 minutes - 1 errors, 0 warnings.
[Apr 26 18:48] Worker stopped.

Here is my current template:

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz...........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[  0ps]
MCH Clock Skew..........................[  0ps]

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]   
System Memory Multipler.........................[ 2.00B    ]   
Memory Frequency 1066...........................[  966     ]    
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.3250v ]  
CPU Termination   [ 1.20    ]...................[ 1.32v   ]  
CPU PLL           [ 1.50    ]...................[ 1.5v    ]  
CPU Reference     [ 0.760   ]...................[ 0.836v  ]  
 
MCH Core          [ 1.100   ]...................[ 1.340v  ]  
MCH Reference     [ 0.760   ]...................[ 0.836v  ]  
MCH/DRAM Reference [ 0.900   ]..................[ auto    ]  
ICH I/O           [ 1.500   ]...................[ 1.5     ]  
ICH Core          [ 1.100   ]...................[ 1.1     ]  

DRAM Voltage     [ 1.800v]...................[1.900v]
DRAM Termination [0.900v]....................[auto]
Channel A Reference [0.900v].................[auto]
Channel B Reference [0.900v].................[auto]

**Dark-Energy** · 04-26-2009, 05:44 PM

Go to your MCH reference and bump it down 1 or 2 notches. I've only owned my UD3P for a bit more than a week, and I've found that (I said this previously before) it likes the MCH reference bumped down one or 2 notches below stock (stock means that if you set VTT to 1.2, MCH reference would say .760, duals work better at .740 to .720, to as low as .65), and when you raise your VTT it scales properly (.760/1.2= .63x; .836/1.32=63x). In other words, it's just more stable at around .60x.

Again it may not help, but it's just good to get educated on some of it, as it may help in the future. Good luck

**Jsunn** · 04-26-2009, 06:16 PM

Originally Posted by Dark-Energy

Go to your MCH reference and bump it down 1 or 2 notches. I've only owned my UD3P for a bit more than a week, and I've found that (I said this previously before) it likes the MCH reference bumped down one or 2 notches below stock (stock means that if you set VTT to 1.2, MCH reference would say .760, duals work better at .740 to .720, to as low as .65), and when you raise your VTT it scales properly (.760/1.2= .63x; .836/1.32=63x). In other words, it's just more stable at around .60x.

Again it may not help, but it's just good to get educated on some of it, as it may help in the future. Good luck

Dark Energy,

OK...

This is a part of the BIOS I have never understood.

I went into th BIOS and I lowered my VTT to 1.2v, CPU Ref to 0.76 and MCH ref to 0.70. I then raised my VTT back to 1.32.

My CPU Ref and MCH Ref both scaled to 0.836v like you mentioned in youe last post.

Am I reading it right?

Step 1: Lower VTT to 1.2v
Step 2: CPU Ref to 0.76v
Step 3: Reduce MCH Ref to a value lower than 0.70v??
Step 4: Raise VTT back to 1.32v
=> CPU Ref scales back to 0.836v and MCH Ref scales to 0.720v-0.740v??

I have to play with MCH ref so when I bring VTT back MCH ref is between 0.720 and 0.740?? Is that right??

Thanks...

Please take a look...

Code:

Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8  x     ]
Fine CPU Clock Ratio............................[ + .5     ]
CPU Frequency 4.105GHz..........................[ 483x 8.5 ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 483      ]
PCI Express Frequency (Mhz).....................[ 100      ]
C.I.A 2 [Disabled] 
 
 
******Advanced Clock Control******

CPU Clock Drive.........................[800mV]
PCI Express Clock Drive.................[900mV]
CPU Clock Skew..........................[  0ps]
MCH Clock Skew..........................[  0ps]

******DRAM Performance Control******
 
Performance Enhance.............................[ Standard ]
MCH Frequency Latch.............................[ 333      ]   
System Memory Multipler.........................[ 2.00B    ]   
Memory Frequency 1066...........................[  966     ]    
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5       ]
tRCD............................................[ 5       ]
tRP.............................................[ 5       ]
tRAS............................................[ 15      ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.25 ]......................[ 1.3250v ]  
CPU Termination   [ 1.20    ]...................[ 1.32v   ]  
CPU PLL           [ 1.50    ]...................[ 1.63v   ]  
CPU Reference     [ 0.760   ]...................[ 0.836v  ]  
 
MCH Core          [ 1.100   ]...................[ 1.340v  ]  
MCH Reference     [ 0.760   ]...................[ 0.726v  ]  <- is this right?
MCH/DRAM Reference [ 0.900   ]..................[ 1.16v   ]  
ICH I/O           [ 1.500   ]...................[ 1.5v    ]  
ICH Core          [ 1.100   ]...................[ 1.1v    ]  

DRAM Voltage     [ 1.800v]...................[1.900v]
DRAM Termination [0.900v]....................[auto]
Channel A Reference [0.900v].................[auto]
Channel B Reference [0.900v].................[auto]

-Jason

**Dark-Energy** · 04-26-2009, 07:31 PM

No, what I meant was...set your VTT to 1.2 so it's at stock voltage. Set your CPU and MCH reference manually to .760 because that's what they default to when VTT is 1.2. When you raise VTT the references will scale up so the ratio is the same. What I actually mean is when you do that and have VTT at 1.2, lower the MCH reference to .700 because it works better for duals. Then raise your VTT back to 1.32 and you will see both of those reference go up to maintain the ratio, and if you do that properly the mch ref should say .77 or around that

I know it's really confusing because it's not like some other boards where it's .65 or .63, instead they give you the actual voltages

This thread should help you understand it a bit more
http://forums.tweaktown.com/f69/how-...asytune-29746/

**Jsunn** · 04-26-2009, 08:15 PM

Originally Posted by Dark-Energy

No, what I meant was...set your VTT to 1.2 so it's at stock voltage. Set your CPU and MCH reference manually to .760 because that's what they default to when VTT is 1.2. When you raise VTT the references will scale up so the ratio is the same. What I actually mean is when you do that and have VTT at 1.2, lower the MCH reference to .700 because it works better for duals. Then raise your VTT back to 1.32 and you will see both of those reference go up to maintain the ratio, and if you do that properly the mch ref should say .77 or around that

I know it's really confusing because it's not like some other boards where it's .65 or .63, instead they give you the actual voltages

This thread should help you understand it a bit more
http://forums.tweaktown.com/f69/how-...asytune-29746/

Holy Cow makes my head hurt.... thanks for the explination.... I think I get it now. I will resume testing tomorrow. Hitting the hay. Catch you on the flip side. Thanks again for all of your help. I will give those settings a try and post back...

**Dark-Energy** · 04-26-2009, 08:36 PM

I know, I had headaches with that too until it took me a few weeks to understand references let alone on the UD3P but one day it just clicked and I understood them....and np for the help

**DOM.** · 04-26-2009, 10:24 PM

**nascasho** · 04-26-2009, 11:30 PM

God I gotta get one of these boards!

**Loco23** · 04-27-2009, 04:50 AM

Jsunn, stay in this range:
CPU Ref = from (CPU Term*0.63) to (CPU Term*0.66)
MCH Ref = from (CPU Term*0.63) to (CPU Term*0.66)

**radaja** · 04-27-2009, 05:12 AM

here is a chart that might help

ET6 0.730 / 0.745 / 0.760 \ 0.785 \ 0.800

vtt 1.20 0.730 / 0.745 / 0.760 \ 0.785 \ 0.800
vtt 1.22 0.742 / 0.757 / 0.772 \ 0.797 \ 0.812
vtt 1.24 0.755 / 0.770 / 0.785 \ 0.810 \ 0.825 CPU reference value in bios
vtt 1.26 0.768 / 0.783 / 0.798 \ 0.823 \ 0.838
vtt 1.28 0.780 / 0.795 / 0.810 \ 0.838 \ 0.850
vtt 1.30 0.793 / 0.808 / 0.823 \ 0.848 \ 0.863
vtt 1.32 0.806 / 0.821 / 0.836 \ 0.861 \ 0.876
vtt 1.34 0.818 / 0.833 / 0.848 \ 0.873 \ 0.888
vtt 1.36 0.831 / 0.846 / 0.861 \ 0.886 \ 0.901
vtt 1.38 0.844 / 0.859 / 0.874 \ 0.899 \ 0.914
vtt 1.40 0.856 / 0.871 / 0.886 \ 0.911 \ 0.926
vtt 1.42 0.869 / 0.884 / 0.899 \ 0.924 \ 0.939
vtt 1.44 0.882 / 0.897 / 0.912 \ 0.937 \ 0.952

vtt 1.20 0.720 / 0.740 / 0.760 \ 0.800 \ 0.840
vtt 1.22 0.732 / 0.752 / 0.772 \ 0.812 \ 0.852
vtt 1.24 0.745 / 0.765 / 0.785 \ 0.825 \ 0.865 MCH reference value in bios
vtt 1.26 0.758 / 0.778 / 0.798 \ 0.838 \ 0.878
vtt 1.28 0.770 / 0.790 / 0.810 \ 0.850 \ 0.890
vtt 1.30 0.783 / 0.803 / 0.823 \ 0.863 \ 0.903
vtt 1.32 0.796 / 0.816 / 0.836 \ 0.876 \ 0.916
vtt 1.34 0.808 / 0.828 / 0.848 \ 0.888 \ 0.928
vtt 1.36 0.821 / 0.841 / 0.861 \ 0.901 \ 0.941
vtt 1.38 0.834 / 0.854 / 0.874 \ 0.914 \ 0.954
vtt 1.40 0.846 / 0.866 / 0.886 \ 0.926 \ 0.966
vtt 1.42 0.859 / 0.879 / 0.899 \ 0.939 \ 0.979
vtt 1.44 0.872 / 0.892 / 0.912 \ 0.952 \ 0.992

Thread: Official Gigabyte UD3 P45 Series -- EP45-UD3 / EP45-UD3R / EP45-UD3P

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