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i7 920 Help A Chump Overclock His CPU (Chapter I) - Page 2

post #11 of 64
Quote:
Originally Posted by Mike Dowson View Post

CPU VCore: 1.22V
QPI/VTT: 1.22V
DRAM: 1.64V
Bclock: 200 mhz
Freq Multiplier: 20 (Turbo Enabled with EIST disabled)
Uncore: Auto (3800 mhz)
DRAM: 1600 mhz (Multiplier: 8)

The system won't start normally. Sometimes it opens, shows the boot menu but then restarts and it gives an error similar to the one found in this article. Other times the BIOS/Q-Flash boot menu freezes altogether and I have to manually shutdown or restart the PC.

What is going on here?
In your SS in the first post, with CPU at max, reported 1.232v - that's at 2.8GHz/133Mhz base clock, you'll need to go above that for a higher base clock/CPU frequency.

Try a 190/191 base clock, put the Freq multiplier down to 12 and try 1.24-1.28v on CPU and see what happens. (always keep an eye on temps smile.gif)
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post #12 of 64
Thread Starter 
CPU VCore: 1.281V
QPI/VTT: 1.340V
DRAM: 1.64V
Bclock: 190 mhz
Freq Multiplier: 12 (Turbo Enabled with EIST disabled)
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Windows started normally with these settings. I successfully underclocked... rolleyes.gif

CPU-Z readings:

Core Voltage 1.264V
Core Speed 2279.60 mhz
Multiplier: x 12
Bus Speed: 189.97 mhz
QPI Link: 3419.40 mhz

Why are there contradictions between CPU-Z and BIOS values? (i.e. VCore)
What was the change that stabilized the config? Was it upping the Volts on the VCore to compensate for the higher bclock?
Edited by Mike Dowson - 1/11/14 at 3:02am
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post #13 of 64
Quote:
Originally Posted by Mike Dowson View Post

CPU VCore: 1.281V
QPI/VTT: 1.340V
DRAM: 1.64V
Bclock: 190 mhz
Freq Multiplier: 12 (Turbo Enabled with EIST disabled)
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Windows started normally with these settings. I successfully underclocked... rolleyes.gif

CPU-Z readings:

Core Voltage 1.264V
Core Speed 22799.60 mhz
Multiplier: x 12
Bus Speed: 189.97 mhz
QPI Link: 3419.40 mhz

Why are there contradictions between CPU-Z and BIOS values? (i.e. VCore)
What was the change that stabilised the config? Was it upping the Volts on the VCore?

That's speedstep that I mentioned. It's intel's way of dynamicly adjust frequency and voltages according to load. If you put the CPU under load (like by running prime95 for example) it should jump up to the settings you set in the bios.
    
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post #14 of 64
Quote:
Originally Posted by Mike Dowson View Post

CPU VCore: 1.281V
QPI/VTT: 1.340V
DRAM: 1.64V
Bclock: 190 mhz
Freq Multiplier: 12 (Turbo Enabled with EIST disabled)
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Windows started normally with these settings. I successfully underclocked... rolleyes.gif

CPU-Z readings:

Core Voltage 1.264V
Core Speed 22799.60 mhz
Multiplier: x 12
Bus Speed: 189.97 mhz
QPI Link: 3419.40 mhz

Why are there contradictions between CPU-Z and BIOS values? (i.e. VCore)
What was the change that stabilised the config? Was it upping the Volts on the VCore?
You successfully overclocked the base clock (and RAM) smile.gif, you need to have base clock and CPU freq (multiplier) stable, if you increase both in one big step and it's unstable you won't know which is the issue. First get a stable base clock with low multi, then increase multi, it's typically only Vcore you need to increase once base clock is stable at a low multi (not always though).

You'll need to start testing with Linx, and really watch the temps, I've got no experience with that cooler.
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post #15 of 64
Thread Starter 
Once again, Turbo Enabled with EIST Disabled + Hyper Threading Enabled.

Isn't that too hot for 3.990 mhz?
Can 3.990 mhz be considered 4.000 mhz? Should I settle and be happy forever after? (nah... rolleyes.gif)
Normally, I think I should just increase VCore one step more to stabilize it ; but I don't really want to go further than 1.3V.
I read on multiple threads that 4ghz is achievable with 1.28V. What am I messing up here?

CPU VCore: 1.3V

QPI/VTT: 1.340V
DRAM: 1.64V
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Please refer to image:
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post #16 of 64
Quote:
Originally Posted by Mike Dowson View Post

Once again, Turbo Enabled with EIST Disabled + Hyper Threading Enabled.

Isn't that too hot for 3.990 mhz?
Can 3.990 mhz be considered 4.000 mhz? Should I settle and be happy forever after? (nah... rolleyes.gif)
Normally, I think I should just increase VCore one step more to stabilize it ; but I don't really want to go further than 1.3V.
I read on multiple threads that 4ghz is achievable with 1.28V. What am I messing up here?

CPU VCore: 1.3V

QPI/VTT: 1.340V
DRAM: 1.64V
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Please refer to image:

4.0 GHz can be achieved with just 1.28 you have a good chip. A really good or "golden" can do it with even less. Other chips need more juice. You might need 1.30, 1.32 or if you are like me and don't have a particularly good chip you might need 1.35.

It all come down to the silicone lottery.

As for the temps. A bit high but nothing to worry about. Most of us tend to like our chips a bit cooler (around 75C) but in reality thees CPU can run hotter then that with out issues.
    
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post #17 of 64
Quote:
Originally Posted by Mike Dowson View Post

Once again, Turbo Enabled with EIST Disabled + Hyper Threading Enabled.

Isn't that too hot for 3.990 mhz?
Can 3.990 mhz be considered 4.000 mhz? Should I settle and be happy forever after? (nah... rolleyes.gif)
Normally, I think I should just increase VCore one step more to stabilize it ; but I don't really want to go further than 1.3V.
I read on multiple threads that 4ghz is achievable with 1.28V. What am I messing up here?

CPU VCore: 1.3V

QPI/VTT: 1.340V
DRAM: 1.64V
Uncore: x16 (3040 mhz)
DRAM: 1520 mhz (Multiplier: 8)

Please refer to image:

Those temps are fine as you'll never hit them in anything other then a stress program
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post #18 of 64
Thread Starter 
VCore: 1.31

A lot more stable, but still had the LinX test fail after 1m 55sec.

This led me to also test with Prime95.

I get two "workers" err every time I run it. The rest is fine though.
Since Prime95 can go on testing even when two CPUs are down, I've been able to enjoy good stable results on all the other CPUs.

This lead me to think about the times I used my 920 on Stock cooling when it would easily exceed 80 C and usually be around 85 C on max load. (I used to catch a 90 C every now and then too!). This was without any O/C.

So I'm starting to believe that I may have beaten Mr. CPU4 and Madame CPU5 to death in those earlier, overly hot, 5 full Stock years... Is this possible?

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post #19 of 64
Quote:
Originally Posted by Mike Dowson View Post

VCore: 1.31

A lot more stable, but still had the LinX test fail after 1m 55sec.

This led me to also test with Prime95.

I get two "workers" err every time I run it. The rest is fine though.
Since Prime95 can go on testing even when two CPUs are down, I've been able to enjoy good stable results on all the other CPUs.

This lead me to think about the times I used my 920 on Stock cooling when it would easily exceed 80 C and usually be around 85 C on max load. (I used to catch a 90 C every now and then too!). This was without any O/C.

So I'm starting to believe that I may have beaten Mr. CPU4 and Madame CPU5 to death in those earlier, overly hot, 5 full Stock years... Is this possible?


It is entirely possible
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post #20 of 64
Thread Starter 
Quote:
Originally Posted by Stay Puft View Post

It is entirely possible

Well, at least I showed them who's the boss then king.gif

Aren't those folks born out of hyper threading? Maybe I could eliminate this instability by Disabling the Hyper Threading altogether? It would also lower temperatures from what I've read but would it really be worth it?
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