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i7 920 Gigabyte x58 Extreme OC advice

post #1 of 25
Thread Starter 
Hey guys,

I spent like 6 hours last night trying to OC my 920 to 4.0Ghz and it's not working. I was able to get it to 3.8 without changing any voltages at all...so I am almost positive that I can get it to go over 4 easy, but as this is my first OC experience and am in need of some advice.

Here is what I have tried so far....

Cpu Clock Ratio - 20x
Base Clock(BCLK) Control - 190

Intel Turbo Boost - Disabled
Cpu Cores Enabled - All
CPU Multi-Threading - Enabled
CPU Enhanced Halt (C1E) - Enabled
C3/C6/C7 State Support - Enabled
CPU Thermal Monitor - Enabled
CPU EIST Function - Enabled
Virtualization Technology - Enabled
Bi-Directional Prochot - Enabled

QPI Link Speed - x36
QPI Link Speed - 7.2Ghz
Uncore Frequency - x14
Isochronous Support - Enabled

Performance Enhance - Standard
System Memory Multiplier - 6.0
Memory Frequency (Mhz) - 1200
DRAM Timing Selectable - Auto

Like I said...I didn't mess with any of the voltages and I ran prime95 for about 10 to 15 mins....(I know if I want to make sure it is "rock-solid" I should run it for like 2 hours or more....but I dont have that kind of time. I did a 15 min run...called it good and went to the next step.

So when I tried 4.0Ghz I changed the BLCK to 200 and then increased the CPU Vcore to 1.35 and the QPU/VTT to 1.5 (I know a big jump...dont ask me why...I have seen a lot of people with these voltages). It booted up and posted....but windows never loaded...it just stayed on a black screen....so I am not really sure what to do.

Advice please?
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post #2 of 25
I think having a QPI/Vtt Voltage that high is bad for the chip.

Can't recall, but you shouldn't take it over like 1.355v or something like that. The BIOS will even show higher numbers in pink to keep you from going that far up.

I'm still working on OC'ing mine too, tried asking in the i7 920 thread for help but none was given.

I can get it to boot up to 4.0GHz but can't seem to get it stable.

Try upping the CPU PLL to 1.84v (shouldn't go over 1.88v from what I've read).

Also disable all these:

CPU Enhanced Halt (C1E) - Enabled
C3/C6/C7 State Support - Enabled
CPU Thermal Monitor - Enabled
CPU EIST Function - Enabled
Virtualization Technology - Enabled
Bi-Directional Prochot - Enabled

I never got a response as to whether all these people hitting 4GHz are doing it with hyperthreading on or off (I'd prefer to leave it on and try to hit 4).
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post #3 of 25
Thread Starter 
Yeah I think I actually read your post and was wondering if you ever got it working.

I will lower the QPI and turn off all that other stuff. I want to keep Hyperthreading enabled as well if its possible.
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post #4 of 25
Now I know that I had a different MB than you but maybe this will help.

Bios Ver: Quantum BIOS (P07)

CPU Features
PPM :Enabled
EIST :Enabled
CxE : Disabled
Execute Disable Bit :
Virtualization :
Hyper Threading : Disabled
Active Processor Cores :All
Memory Settings
Memory Controller Settings
IMC Configuration :
Channel Congifuration :
Channel Interleaving :6-way
Rank Interleaving :4-way
Memory Timings
Extreme Memory Profile XMP :OFF
Memory Profile Select :OFF
DRAM Timing Control :SPD
tCL (CAS Latency) :7
tRCG (RAS to CAS Delay) :7
tRP (RAS Precharge) :7
tRAS (Precharge Delay) :16
CR (Command Rate) :1
tRFC (Refresh Cycle Time) :
tWR (Write Recovery Time) :
tWTR (Write to Read Delay) :
tRRD (RAS to RAS Delay) :
tRTP (Read to Precharge) :
All Voltage Settings
CPU Voltages
CPU Core Voltage :+120mv
CPU Target Core Voltage :1.42
CPU Vdroop Compensation :Enabled
CPU VTT (UnCore) Voltage :+240mv
1.8 PPL Voltage Setting :1.82
CPU Clock Amplitude Ctrl :.8
Memory Voltages
DRAM Voltage :1.65
DIMM1 Vref CA (Addresses) :.5
DIMM1 Vref DQ (Data) :.5
DIMM2 Vref CA (Addresses) :.5
DIMM2 Vref DQ (Data) :5
DIMM3 Vref CA (Addresses) :.5
DIMM3 Vref DQ (Data) :.5
Chipset Voltages
X58 IOH Core Voltage :1.28
X58 IOH VCCA 1.1V :1.125
X58 IOH VCCA 1.5V :1.506
ICH10 SB Voltage :1.506
OC Gear : Skipping this part
CPU Turbo :OFF
System Turbo :ON
Clock Speed Control Center
CPU Bclock (FSB) :200Mhz
QPI Link Fast Mode :
QPI Multiplier :18
QPI Target Speed :
CPU Core Multiplier :19
CPU Core Target Speed :3.8GHz
CPU Uncore Multiplier :16
CPU Uncore Target Speed :3208MHz
Memory Bus Multiplier :8
Memory Bus Target Speed :1604MHz
CPU Clock Skew :0
IOH Clock Skew :0

Also check this thread out. At the bottom of the first post is a guide to OCing your MB. It is a PDF LINK that you will need to download... hope that helps as well.
http://www.overclock.net/intel-cpus/...ted-daily.html
Edited by Villainstone - 4/24/09 at 11:14am
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post #5 of 25
Thread Starter 
Yeah I actually have tried following that guide...and it didnt work for me. Which is kinda funny since have the same basic setup. Same Board, Chip, Memory. The heatsink is different but my Noctua is as good in my opinion...cause my temps are actually 1 to 2c lower then what he is getting. I am not sure what Bios he is using...but I doubt that would be the problem.


edit: Actually I just took a closer look at the POST screen shot and it says F4e...do you think trying this bios is worth a shot?
Edited by TG Bulldog - 4/24/09 at 11:26am
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post #6 of 25
Well fwiw, I run over 4.2 with HT and Turbo on but it took a lot of messing around with voltages. I'm also on water and have no qualms going beyond what Intel says is safe.

If you are an overclocker than recommended maximums means...not a whole lot. If you are just trying to get a bit more, or are scared of killing something than play inside Intel's lines.

21*203, memory x8, uncore x16, vCore 1.4250(1.49 load), vD 1.665(1.687 load), vtt 1.32+.0500(1.367 load) but it's different for every cpu. My first i7 (xx42A stepping)stopped at about 21*194 and would go no further. It ran at lower voltages though up to that point than my present B stepping cpu.

What is you are doing that 3.8wHT is not good enough? I know of many that cannot stably go over 3.8 w/HT on at all. 3.8-4.0 seems to be the general top end with HT for quite a few users. The extra voltages required to push higher is just too much for some people and/or their cooling can't handle it.

cpu/vtt voltage is mostly in relation to your UnCore/QPI/memory speeds. Since yours are down at the 1200 level I would think you should be able to run much lower vtt. Your vCore however may very well need to go higher for 4.0Ghz. 3.8Ghz is almost a 50% OC and is over a full 1Ghz gain, unless you are a rabid bencher, or just a freakazoid mad scientist like me, why are you so dead set on 4.0?

I would suggest working with a different multi. I have only tried 20x a couple times and had nothing but headaches. I run either 21 or 19 unless I'm trying to test some new ram or something and then I drop to 12x on the cpu.

15 min of P95 is not much but I do stuff like that too while moving up in my clocks/testings. At a certain setting I run my tests anywhere from 5-30 minutes and then move up again until I get quick crashes/BSOD's and then work on stabilizing that and move up again. It takes time to do it right.


Thats a screenie at 21*201. Since then I've gotten it up to 21*203 booting from bios and higher by adjusting once in Windows. Also tightened up my ram a bit to 8-8-8-21 and have called that my top stable HT setting. I'm now working on speeds without HT and am over 4.3Ghz myself. I am not your average user though it seems. I don't use other peoples settings and test the crap out of my own.

If you want to just try to slam 4+ try putting your vC to 1.45, vtt to 1.35, vDimm to a hair over whatever your manufacturer lists and manually set your ram timings. Try that. I don't promise anything though, those are just voltages that stay inside Intels lines. Watch your temps, even with that, you may just not be able to do 4.0 with HT on period.
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post #7 of 25
Quote:
Originally Posted by TG Bulldog View Post
edit: Actually I just took a closer look at the POST screen shot and it says F4e...do you think trying this bios is worth a shot?
Quote:
Originally Posted by Villainstone View Post
Also check this thread out. At the bottom of the first post is a guide to OCing your MB. It is a PDF LINK that you will need to download... hope that helps as well.
http://www.overclock.net/intel-cpus/...ted-daily.html
That dude in the PDF used 1.515V (it goes purple at 1.36 in my BIOS, and I get a warning about it being not good for long term life of CPU, while saving the settings) to VTT while 1.4 Vcore. I am not sure if people really wanna do that and stress test it through LinX... But its good for joining the 4G club. I did hit 4G without going that high on VTT but its not something that I would stress test the system with.

Moreover, he relies on EasyTune6's CPU temp (which is about 20-30C lower than core temperatures under load under any kind of overclock above 3.2) for his measurement of the CPU temperature that he feels happy with. I am pretty sure that with that kind of VTT and Vcore, you would hit mid to upper 80s if CPU temp is 53C in easytune. And his setup was on a table, not a case, which will add 4-5C to his temps easily depending on the case.

Someone forgot to tell him to upgrade to realtemp and be more careful...

4G is hard to stablize with C0/C1. 3.69 (with HT ON, x19, turbo off) was the max (and 4hr LinX stable with 50 iterations of 26100 under 64-bit) I could go with vcore below 1.4, and vtt below 1.35. Its something I can run 24x7 without worries.
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post #8 of 25
Quote:
Originally Posted by nebuchanezzar View Post
21*203, memory x8, uncore x16, vCore 1.4250(1.49 load), vD 1.665(1.687 load), vtt 1.32+.0500(1.367 load) but it's different for every cpu. My first i7 (xx42A stepping)stopped at about 21*194 and would go no further. It ran at lower voltages though up to that point than my present B stepping cpu.
Nice!

One thing I should mention is that I have hit BSOD after 2hours of LinX (about 25-30 runs) many times, meaning the minimum that I trust for stability is 50x26000 for a 6gb ram 64-bit system, which takes anywhere from 3 to 4 hours depending on the CPU speed. 20x and 1 hr is on the lower side of stability test. But I am sure, even if it fails after 2 hrs, your OC will be affected by at most 1 BCLK (200 instead of 201), which is still 4.2. So, a very good job!

For my 24x7 OC, I run LinX with 100x26000 overnight.
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post #9 of 25
i would highly recommend you updating your bios to f7c. its more stable and works better with current c0 stepping.
post #10 of 25
Quote:
Originally Posted by Jason4i7 View Post
i would highly recommend you updating your bios to f7c. its more stable and works better with current c0 stepping.
What's that f7c? I have read similar suggestions for UD4P as well but I don't find the BIOS on gigabyte webpage. What is f7c and where did you get it?
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