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Guide to Overclocking the Core I7 920 or 930 to 4.0ghz - Page 63

post #621 of 1477
Quote:
Originally Posted by Pie Killa View Post
When I was speaking to Asus about overclocking, they automatically assumed I had TM turned off, and told me to turn it off. Apparently it can interfere with overclocks, but I agree that it isn't well understood when it actually kicks in. Also I think secondary protections might be the motherboard 'Northboard' protection, it may save the motherboard if the cpu gets too hot, although I cannot say anything for the condition of the cpu.

Interesting that Asus assumed you had it disabled. That says a lot. Probably a good idea to just disable it as standard procedure for overclocking then.

I found this description of the TM function by the author of the i7 Turbo tool. As it's described here, it only takes effect when the CPU is on the turbo multiplier. So, for a 930, this would only occur if it's set to 22x, and the throttling would rapidly cycle it back and forth to 21x. And for the 920, it would occur at 21x and throttle back to 20x.

http://www.xtremesystems.org/forums/...d.php?t=225450

Reading more about thermal protection on core i7 systems, there are mechanisms provided by the board to automatically disable turbo mode if TDP limit or overcurrent condition occurs, and there is a thermal limit around 90C that will also disable turbo mode, and finally, a shutdown feature that will force shutdown at a little over 100C.
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post #622 of 1477
FYI the i7 Turbo tool is bundled with Real Temp. I hadn't noticed it, but apparently it's been there for a couple versions now.
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post #623 of 1477
Quote:
4. A good PSU with an EPS(8 pin) plug.
Can anybody explain to me what this means? Will this work?
post #624 of 1477
Quote:
Originally Posted by cruiselax View Post
Can anybody explain to me what this means? Will this work?
He is basically saying to get a power supply that isn't a piece of crap. The one you listed is good but not the greatest. If you don't need 850W, you can get a Antec TruePower TP-750 Blue for $85 after MIR (and code) which will be more efficient than that Corsair PSU.
post #625 of 1477
Funny got a 124 BSOD on Linx, never had that before so didn't think it was possible. It did turn out that I needed to increase my QPI/VTT, stable at 4.17GHz now.



Does anyone know how much the Droop from VTT voltage really is? Is it comparable to CPU vDroop?
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post #626 of 1477
Hello guys this is my 1st post in the forum since I am a new member here. I just got my new system and I am about to start within the next few days with oc'ing it. Really great job with this guide I ll try to stick to it and I am looking forward to your useful feedback on my results and my progress. Btw if anyone has already settings that worked for his 930 going 3.8+ on a GB - UD7 I would be very obliged to see them posted so I can have a comparison base. I know that not all cpu's are the same but still it might save me some time and effort.
Edited by Vulgi - 5/24/10 at 10:25am
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post #627 of 1477
About VTT and QPI, I see 1.35 as a limit being wrong. I know Intel set this as the limit and heck I am a voltage stickler. I REFUSED to go above 1.35 for the longest time. Some RAM chips WILL need higher VTT/QPI. After weeks of arguing with G.Skill and combing through forums, it seems that the recommendations of going above 1.45 and even 1.5 make sense.

Here's a good post talking about it:

http://forums.tweaktown.com/f69/post...tml#post312297

I too have read Corsair forums and it seems many chips DO have XMP profiles where VTT/QPI is well above 1.4 volts. Some of these chips seem to require it, and I would trust that at least these manufacturers did some research.

Perhaps I may be shortening the lifespan of my CPU significantly, but in order to get the rated 2000 9-9-9-27 on my Ripjaws I need around 1.47 QPI or so.
post #628 of 1477
I cannot get my i7-920 D0 CPU to overclock to 4.0 MHz (BCLK 190, X21). I've tried everything!!!

I've tried increasing my VCore to 1.3, increasing IOH and ICH to 1.2 V, increasing the CPU PLL to 1.88 V, and increasing PCIE to 102.

I can boot with the following settings (see below), but after 5 mins of Prime Small FFT's I get the 124 BSOD. From what I've read 124 BSOD is a hardware error, it could be anything from the RAM, to my PSU to my graphics card. Plus my temps are below 80 deg C at full load while running Prime.

I'm starting to think it's my RAM, but Small FFT's don't really even test RAM. There are no reported Prime errors as it can only run for 5 mins. I've already increased my VTT Voltage to 1.340 and my DRAM to 1.654, plus I'm using stable multipliers (see below).

The only other thing I can think of is increasing my VCore even more, but my chip is a D0 I shouldn't have to add any more voltage! Most can get 4.0 stable with VCores of 1.25, I'm already at 1.3! Could it be a different setting in my BIOS thats screwing things up?

I can run stable at 3.78 (180 BCLK, 21X) with a VCore of 1.2375V.

Here are the OC settings that fail (124 BSOD)
CPU Ratio: 21
BCLK Freq: 190
PCIE Freq: 100 (Tried 102)
CPU Freq: 3,990 Hz
CPU Voltage: 1.3000 V
DRAM: 6x = 1,140
Uncore: 2X = 2,280
QPI: 18x = 3,420.0
VTT Voltage: 1.340 V
DRAM Voltage: 1.654 V
IOH Voltage: Auto (Tried 1.203)
ICH Voltage: Auto (Tried 1.20)
CPU PLL: 1.82 V (Tried 1.88)

I have the following power savings options:
C1E=Disabled
Intel VT=Disabled
CPU Thermal Throttling: Enabled
No-Execute Memory Protection: Disabled
Hyper Threading: Enabled
A20M: Disabled
EIST: Disabled
C-STATE: Disabled
Spread Spectrum: Disabled
ASRock VDroop Control: Without VDroop
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post #629 of 1477
Tried more VTT? 1.4 is perfectly safe.
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post #630 of 1477
Quote:
Originally Posted by fish1717 View Post
I cannot get my i7-920 D0 CPU to overclock to 4.0 MHz (BCLK 190, X21). I've tried everything!!!

I've tried increasing my VCore to 1.3, increasing IOH and ICH to 1.2 V, increasing the CPU PLL to 1.88 V, and increasing PCIE to 102.

I can boot with the following settings (see below), but after 5 mins of Prime Small FFT's I get the 124 BSOD. From what I've read 124 BSOD is a hardware error, it could be anything from the RAM, to my PSU to my graphics card. Plus my temps are below 80 deg C at full load while running Prime.

I'm starting to think it's my RAM, but Small FFT's don't really even test RAM. There are no reported Prime errors as it can only run for 5 mins. I've already increased my VTT Voltage to 1.340 and my DRAM to 1.654, plus I'm using stable multipliers (see below).

The only other thing I can think of is increasing my VCore even more, but my chip is a D0 I shouldn't have to add any more voltage! Most can get 4.0 stable with VCores of 1.25, I'm already at 1.3! Could it be a different setting in my BIOS thats screwing things up?

I can run stable at 3.78 (180 BCLK, 21X) with a VCore of 1.2375V.

Here are the OC settings that fail (124 BSOD)
CPU Ratio: 21
BCLK Freq: 190
PCIE Freq: 100 (Tried 102)
CPU Freq: 3,990 Hz
CPU Voltage: 1.3000 V
DRAM: 6x = 1,140
Uncore: 2X = 2,280
QPI: 18x = 3,420.0
VTT Voltage: 1.340 V
DRAM Voltage: 1.654 V
IOH Voltage: Auto (Tried 1.203)
ICH Voltage: Auto (Tried 1.20)
CPU PLL: 1.82 V (Tried 1.88)

I have the following power savings options:
C1E=Disabled
Intel VT=Disabled
CPU Thermal Throttling: Enabled
No-Execute Memory Protection: Disabled
Hyper Threading: Enabled
A20M: Disabled
EIST: Disabled
C-STATE: Disabled
Spread Spectrum: Disabled
ASRock VDroop Control: Without VDroop

Seems pretty unclear what you're dealing with. You're saying small FFT crashes after 5 mins? Have you also tried large FFT? If they both fail, I'm not sure you can really draw any accurate conclusions from that result. It's vague, at best.

Sort of off-the-wall, but maybe you could try a lower multiplier and higher base clock. Looks like you're not making headway with your current setup, so might be worth a try. Start at 200x19 to get 3.8 stable, then up base clock to 210 and see what happens. Who knows, it isn't looking like anybody here is going to give you a eureka answer!
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Late Apex
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