Core i7 920 rev D0 stepping 5 :)

[aoch88]

Does anyone knows if BCLK is CPU dependent or the motherboard? I mean, what is the factor to run at high BCLK.

[eva2000]

Does anyone knows if BCLK is CPU dependent or the motherboard? I mean, what is the factor to run at high BCLK.

Bit of both cpu and board.. i have 4x i7 920 (2x c0 and 2x d0) and w3520 d0 all 5 cpus do 230bclk 32m pi and 3d bench on DFI UT X58-T3EH8 on air and water. I'm probably more board limited than cpu but each cpu required differing cpu vtt, ioh/ich voltages to reach 230bclk straight boot from bios into windows.

[hlonipha]

LOL I know I pull my hair out every time I see someone claim you can't pass linx when you have a Prime blend stable 8 hours or more. It drives me crazy because it has never been the case for me Linx is rough on temps but easy on stability it is roughly equivalent to Prime small FFT's in my experience and that's with 3 different processors and 2 different sets of ram. Also 2 different mobos... It's not that I don't believe anyone It's just that I would love to see some screenshots showing otherwise to satisfy my curiousity because in my experience I just don't see how it's possible and i've never seen anyone post screenshots saying otherwise so I continue to believe it's not possible.

I don't think this debate will ever get solved though even with screenshots, because there will always be people to claim otherwise

+1 on this. I can run prime Small fft's for 12 hrs at 1.32vcore just like linx 20 passes but when I run prime blend I need 1.34v for the same 12 hrs run.

[eva2000]

for prime95 guys use custom blend or large ffts with 5400mb allocated probably best settings for testing but still fo rme linx and even hyper pi 8x32m might need more vcore than prime95 for SOME cpus not all from my experience with 4x i7 920 c0 and d0 and w3520

[aoch88]

Bit of both cpu and board.. i have 4x i7 920 (2x c0 and 2x d0) and w3520 d0 all 5 cpus do 230bclk 32m pi and 3d bench on DFI UT X58-T3EH8 on air and water. I'm probably more board limited than cpu but each cpu required differing cpu vtt, ioh/ich voltages to reach 230bclk straight boot from bios into windows.

Thanks and darn, you've got plenty of i7 CPU's there, lol. Btw, I've got this weird problem whereby I could run Prime stable on 20x200 and 21x197 but the moment I do 21x200, nothing seems to work even if I add 2-3 notches of Vcore, PLL, VTT.

What do you think could be wrong? I tried 21x201 and no luck as well. What voltage do I normally have to add for higher BCLK (above 200)

[mremulator]

Thanks and darn, you've got plenty of i7 CPU's there, lol. Btw, I've got this weird problem whereby I could run Prime stable on 20x200 and 21x197 but the moment I do 21x200, nothing seems to work even if I add 2-3 notches of Vcore, PLL, VTT.

What do you think could be wrong? I tried 21x201 and no luck as well. What voltage do I normally have to add for higher BCLK (above 200)

Same here, tried everything... can't get past 200Mhz on my R2E & i7 920 D0??

However, 21x200 is rock solid 24/7.

[jcniest5]

Same here, tried everything... can't get past 200Mhz on my R2E & i7 920 D0??

However, 21x200 is rock solid 24/7.

I suppose when you mean "everything," that includes bumping up PCI-E Frequency to 110+, too?

[mremulator]

I suppose when you mean "everything," that includes bumping up PCI-E Frequency to 110+, too?

I did try 101, 103, 105 & 110. Also eliminated RAM by lowering multi etc.

Strange how I can't post 1MHz above 200 BCLK??

[rge]

My i940 was cpu limited, bclk max was 215 with normal voltages, 217 max with voltages everywhere from black to red, not a setting I did not try in bios.

My i950 is mobo limited. Boots up 222 bclk with normal volts/settings no problem. 223 is no go. Then raise pcie, ioh, vtt, etc and 229.x boots up fine. Raising pcie above 103.3 or bclk above 229.x to 230 it freezes. I think if I could raise pcie higher could do more.

But like eva said, limit can be either. I think if your cpu makes it to 222, it is probably mobo holding u back, since most mobo on normal settings take a reasonable cpu to that point. If cpu is crapping out a lot earlier may be more of cpu issue. But I have seen most D0 get to much higher bclk than C0's.

[mremulator]

My i940 was cpu limited, bclk max was 215 with normal voltages, 217 max with voltages everywhere from black to red, not a setting I did not try in bios.

My i950 is mobo limited. Boots up 222 bclk with normal volts/settings no problem. 223 is no go. Then raise pcie, ioh, vtt, etc and 229.x boots up fine. Raising pcie above 103.3 or bclk above 229.x to 230 it freezes. I think if I could raise pcie higher could do more.

But like eva said, limit can be either. I think if your cpu makes it to 222, it is probably mobo holding u back, since most mobo on normal settings take a reasonable cpu to that point. If cpu is crapping out a lot earlier may be more of cpu issue. But I have seen most D0 get to much higher bclk than C0's.

Don't think it's my chip. I have had an i7 920 C0, i7 940 plus my current i7 920 D0. I'm yet to see my R2E even post above 200Mhz. Just ordered a Classified, so I'll find out soon I guess.

[bluehaze]

Bit of both cpu and board.. i have 4x i7 920 (2x c0 and 2x d0) and w3520 d0 all 5 cpus do 230bclk 32m pi and 3d bench on DFI UT X58-T3EH8 on air and water. I'm probably more board limited than cpu but each cpu required differing cpu vtt, ioh/ich voltages to reach 230bclk straight boot from bios into windows.

You can boot from bios into windows @ 230 bclk? That is impressive if so. I am unable to boot higher than 222 on my Classified but can go much higher once already into Windows. Is this on the LP UT? might have to pick one up to play with!

[jcniest5]

I did try 101, 103, 105 & 110. Also eliminated RAM by lowering multi etc.

Strange how I can't post 1MHz above 200 BCLK??

A mystery we all have to discover, I guess. The i7 is still very much fill with mystery. Same board and model of CPU, same settings, etc...some users are able to do things others can't.

[rge]

Don't think it's my chip. I have had an i7 920 C0, i7 940 plus my current i7 920 D0. I'm yet to see my R2E even post above 200Mhz. Just ordered a Classified, so I'll find out soon I guess.

yeah, if all 3 cpus stop at same mhz...that does not sound like cpu problem. post your results with classified when you get it, interested to see what you get.

Actually was not directing my post to you anyways. I was just randomly adding my 2 cents to the discussion.

[jcniest5]

Went through your post history and saw the 4.7Ghz validation, that's pretty impressive. What are you running 24/7?

I believe it's my board that is the limiting factor on my OCing because I have two D0s that OC the same and anything else I try, both would crap out. That factor alone tells me it's my board that is unable to OC the way I want it to. I only managed to get that CPU-Z Validation screen, but if I run LinX (or OCCPT, Everest Benchmark modules, et) both would crap out. The only stable OC I've managed to run on both of them is 21x205 (4.305Ghz). Even 21x210 craps both out. I just sold one of them and now down to just one D0. Am thinking of getting a Xeon to try. Am also thinking of the 3849B018 from the local Micro Center.

[MACMAC]

Am also thinking of the 3849B018 from the local Micro Center.

Sub-week 50 chips are disappearing quickly, so I wouldn't hesitate to buy it.

Having said that, as you mentioned, your board is likely holding you back so another CPU likely won't give you any gains.

[aoch88]

I suppose when you mean "everything," that includes bumping up PCI-E Frequency to 110+, too?

Am I missing something? What has PCI-E frequency got to do with high BCLK clocks? I mean if we stress the PCI-E frequency, it'll affect the graphics card and prolong usage at such high freq. might kill it?

Well, i7 is still new to most of us so maybe this PCI-E freq. has some secret beneath it?

[MACMAC]

Am I missing something? What has PCI-E frequency got to do with high BCLK clocks? I mean if we stress the PCI-E frequency, it'll affect the graphics card and prolong usage at such high freq. might kill it?

Well, i7 is still new to most of us so maybe this PCI-E freq. has some secret beneath it?

By raising the PCI-E frequency you raise the BCLK limit. Don't ask me why

[RNeon]

Hello,

here is now my new 920 D0 Batch: 3849A769

[no_n|ck]

great! where did you bought your cpu?

[boldenc]

Hello,

here is now my new 920 D0 Batch: 3849A769

try to test your CPU with LinX with max memory available and 25 passes

[RNeon]

great! where did you bought your cpu?

ebay

[LinkinParkBoy]

Ai Overclock Tuner ................. [Manual]
CPU Ratio Setting .................. [21]
BCLK Frequency ...................... [200]
PCIE Frequency ..................... [100]
DRAM Frequency ..................... [1600Mhz]
UCLK Frequency ..................... [3400]
QPI Link Data Rate ................. [Auto]

Dram Timming Control -> 9-9-9-20

EPU II Phase Control................[Full Phase]
Load Line Calibration.................[Enabled]
Cpu Differential Amplitude..........[Auto]

Extreme OV.............................[Disable]

CPU Voltage ........................ [1.21v]
CPU PLL Voltage .................... [1.81v]
QPI/Dram Core Voltage .............. [1.20v]
IOH Voltage ........................ [Auto]
IOH PCIE Voltage ................... [Auto]
ICH Voltage ........................ [Auto]
ICH PCIE Voltage ................... [Auto]
Dram Bus Voltage ................... [1.55v]
____________________________________

CPU Spread Spectrum ................ [Disable]
PCIE Spread Spectrum ............... [Disable]
CPU Clock Skew ..................... [Auto]
IOH Clock Skew ...................... [Auto]


21 x 200 = 4200Mhz | Rams: 1600Mhz
Rampage II Extreme + Team Elite 1333Mhz @ 1600Mhz 1.5v @ 1.55v

Congrat. very nice CPU, what's D0 batch?

Sorry, 3849A769

[Kimofil]

ebay

Greatest Vcore for this frequency that i have ever seen....

[LinkinParkBoy]

True 4200, 1.16v, Batch?

[Sem]

got my 920 today (3845B071) VID 1.0750 and so far so good

up to 4ghz 200x20 @ 1.27v load

still testing but i reckon i can lower the vcore abit

i am worried about the temps tho
seen up to 83c under prime

using a lapped TRUE with washer mod

whats the Tj max for this cpu?