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

[bluestang]

Robust Graphics Booster....................[Auto]
CPU Clock Ratio............................[ 9x
Fine CPU Clock Ratio.......................[+0]
CPU Frequency..............................[ 4608]

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

CPU Host Clock Control.....................[Enabled]
CPU Host Frequency (Mhz)...................[ 512]
PCI Express Frequency (Mhz)................[103]
C.I.A 2....................................[Disabled]

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

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

Performance Enhance........................[Standard]
(G) MCH Frequency Latch....................[400]
System Memory Multipler....................[3.2B]
Memory Frequency 1066......................[1707]
DRAM Timing Selectable.....................[Manual]

CAS Latency Time[7]........................[7]
tRCD[7]....................................[7]
tRP[7].....................................[7]
tRAS[16]...................................[20]

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

All on Auto except:
read training disabled
Static tRead Value (Performance Level) = 9
TRFC = 72

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

Load-Line Calibration......................[Enabled]
CPU Vcore          [1.20000]...............[1.4125]
CPU Termination    [1.200].................[1.8]
CPU PLL            [1.550].................[1.570]
CPU Reference      [0.805].................[0.810]

MCH Core           [1.100].................[1.38]
MCH Reference      [0.760].................[0.79]
MCH/DRAM Reference .......................[.93]
ICH I/O            [1.50].................[1.50]
ICH Core           [1.100].................[1.100]

DRAM Voltage       [1.500].................[1.98]
DRAM Termination   [0.750].................[.93]
channel refs all .93 

CPU Term @ 1.8 Wow!

[gurusan]

Sorry...that should be 1.28V !! lol.

did some more testing and it seems the sweet spot on this chip is 4.725GHz with 1.408V. It fails linX but is totally stable so far gaming and doing a quick CFD simulation

[Hoss331]

some more playing

You do realize that the 3:5 (3.33) divider is bugged and that its really only (3.00) 1575.

[gurusan]

How do I verify that?

[bluestang]

Sorry...that should be 1.28V !! lol.

did some more testing and it seems the sweet spot on this chip is 4.725GHz with 1.408V. It fails linX but is totally stable so far gaming and doing a quick CFD simulation

1.28v...That sounds more like it! Thanks for you settings.

[Hoss331]

How do I verify that?

Check the bandwidth between the dividers.

[bluestang]

You do realize that the 3:5 (3.33) divider is bugged and that its really only (3.00) 1575.

Is that on all EP45T boards? I have an EP45C also, same there?

[gurusan]

well that would explain why I've been disappointed with my bandwidth

[Hoss331]

Is that on all EP45T boards? I have an EP45C also, same there?

P45s in general, not sure on other chipsets though.

[gurusan]

that's a real pain in the ass. the 4.00 divider is too much to handle on the p45 chipset and the 3.00 is too little!
Just have to make do with tighter timings I guess

[Hoss331]

Theres still 3.20B.

[gurusan]

I can't seem to have much luck over 500FSB though with 3.20B

[radaja]

heres a good thread about the issue w/3:5 divider
3:5 divider on X38/P35/X48/P45 is broken, is 2:3 in reality on 400 strap

[truehighroller]

Is the 2.4b which I'm using, a good strap? Just curious I seem, to not have any issues with it so.. Still curious though.

[radaja]

yes,333 strap 2.40B is 5:6 divider which i found to be the best for me

RAM ratios:for the UD3P

200 strap: 3:4, 3:5, 1:2
266 strap: 4:5, 2:3, 1:2
333 strap: 1:1, 5:6, 5:8, 1:2
400 strap: 1:1, 3:4, 2:3

[gurusan]

Have managed to get the 3.20B strap working at higher FSB.

[Songok]

Hi all,

I have my E8400 stable @4.2 but am having some problems getting my DDR3 stable at 1400.
My ram: http://www.ocztechnology.com/product...atinum_edition

I am using the 2.66D strap, is this a good choice or does it matter? I am narrowing the problem down to the boards auto trfc and Trd settings. Getting progresively longer blend runs with trd set progressively lower. Got 4 hours blend at trd 12, trying 11 now. Also have Trfc down to 72 from auto at 78. Is 11 low or high for DDR3 at 1400?
Thanks for any input.

[bluestang]

Hi all,

I have my E8400 stable @4.2 but am having some problems getting my DDR3 stable at 1400.
My ram: http://www.ocztechnology.com/product...atinum_edition

I am using the 2.66D strap, is this a good choice or does it matter? I am narrowing the problem down to the boards auto trfc and Trd settings. Getting progresively longer blend runs with trd set progressively lower. Got 4 hours blend at trd 12, trying 11 now. Also have Trfc down to 72 from auto at 78. Is 11 low or high for DDR3 at 1400?
Thanks for any input.

I say drop your FSB down to 500 and use CPU multi 8 or 8.5. Then set your Latch to Auto and use the 3.20B RAM multi for 1600 MHz. Might be able to drop you NB volts then. Try trd (Perf Level) of 8 or 9. MCH ref might be giving you issues also.

[Songok]

I say drop your FSB down to 500 and use CPU multi 8 or 8.5. Then set your Latch to Auto and use the 3.20B RAM multi for 1600 MHz. Might be able to drop you NB volts then. Try trd (Perf Level) of 8 or 9. MCH ref might be giving you issues also.

Thanks for the suggestion bluestang, much appreciated, am blending now at 500x8 with 3.2B. I have left my memory timings very loose for first run.
My easytune readout for 4.2 stable with ram at 1050 is below. Is there much benefit to having ram at 1600 over 1050(1:1 FSBRAM) with low timings? i know my ram was undercloceked when at 1050 but i am having a tough time gettin blend stable at anything but 1:1.

[truehighroller]

Thanks for the suggestion bluestang, much appreciated, am blending now at 500x8 with 3.2B. I have left my memory timings very loose for first run.
My easytune readout for 4.2 stable with ram at 1050 is below. Is there much benefit to having ram at 1600 over 1050(1:1 FSBRAM) with low timings? i know my ram was undercloceked when at 1050 but i am having a tough time gettin blend stable at anything but 1:1.
[/IMG]

I think its probably like stang said that your ref settings are off. When you switch anything in the BIOS or at least for me, you have to start all over again other wise you will have all kinds of issues. When I say all over again I mean all over again settings wise.

You have to tweak each individual setting all over again. I can just pop my head in to the BIOS not make any changes but, tell it to save the settings and my system will want to be tweaked again to get stable again. Maybe this is just me here but that is how mine acts.

[bluestang]

Thanks for the suggestion bluestang, much appreciated, am blending now at 500x8 with 3.2B. I have left my memory timings very loose for first run.
My easytune readout for 4.2 stable with ram at 1050 is below. Is there much benefit to having ram at 1600 over 1050(1:1 FSBRAM) with low timings? i know my ram was undercloceked when at 1050 but i am having a tough time gettin blend stable at anything but 1:1.

I think 3.20B gives the best performance. Post a MemSet screenshot along with the SPD from it so we can see what your RAM settings are at.

[Songok]

I think 3.20B gives the best performance. Post a MemSet screenshot along with the SPD from it so we can see what your RAM settings are at.

So it failed Prime blend at the 896(?) size with all ram settings on auto (ridiculously loose 10-10-10-24) So i set to 7-7-7-20 and left everything else on auto and running blend again. there is a problem with the spd on this ram so i am getting the 7-7-7-20 from ocz website and forum. Below is current memset values. Thanks for your help, would love to get ram stable at 1600. I am using voltages same as in previous post.
edit: i bumped dram voltage up to 1.82, prob needs this at 1600?

[Don_Dan]

Thats all I saw, that and the ram voltage is higher than I have ever used lol. Everything else looks fine to me. I used Auto for some of the other ref's but if Normal worked for you before it shouldn't be a problem now. Radaja is good with the c2d settings, maybe he will have some better idea.

Have you tried using PL8-240B? It worked fine with the G.Skill PI's well over 1200mhz.

Thanks for your tips! Setting 800/800/150/150 got things stable very fast, I could even lower vtt and vMCH and still boot at 510MHz FSB speed.
I was setting PL8 in Windows using MemSet.

Thanks again!

@DonDan

Sorry I can't help man I never tried this board with Duo Cores.

No problem mate, I think you saw my results on hwbot, it worked out.

[bluestang]

Thanks for your tips! Setting 800/800/150/150 got things stable very fast, I could even lower vtt and vMCH and still boot at 510MHz FSB speed.

So what's the feeling on these Drive and Skew Settings? What's ideal for the Core2Duos at high (500+) FSB?

[Songok]

So what's the feeling on these Drive and Skew Settings? What's ideal for the Core2Duos at high (500+) FSB?

Well when i was running 8x525 DDR3 1050 i had these set at 800/900/0/0 and that was very stable. I had instability before i changed pci express clock drive to 900.