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Haswell Overclocking Guide [With Statistics] - Page 994

post #9931 of 19603
Thread Starter 
Quote:
Originally Posted by Jetskyer View Post


Thanks for the fast response!

Username: Jetskyer
CPU Model: i5 4760k
Core Multiplier: 100
CPU VID: 1.44
Vcore: 1.45
Uncore Multiplier: 38
Uncore Voltage: 1.2
Cooling Solution: custom liquid (MIPS IceForce HF)
Stability Test: Prime95
Batch Number: where can I find the batch-number?
Ram Speed: 1600 (haven't looked into that yet)
Ram Voltage: 1.5
Input Voltage: 2.10
LLC Setting: 7
Motherboard: Asus Maximus VI Gene

The 80 degrees was with prime95, both small and large fft's

1.44v and Prime at 80C? Your temps are great! I got 73C with Small FFT 27.9 Prime @ 1.25v. Everything about your overclock seems good. The only things left are small... As you're already stable on 1.44v with 2.1v Vrin, the OC is basically all set... You could try upping that uncore just a little bit, you might be able to net a higher uncore without touching the uncore voltage. Or you could even go 1.25v Uncore voltage and up that uncore to maybe x42, x43.

How long did you run Prime?

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post #9932 of 19603
Quote:
Originally Posted by peakclimber View Post

I'm not familiar with MSI's bios, but C3 should also give a chance for Vcore to drop. Just tried it on my Asus board: Core C3 enabled, C6/7 Disabled. Package C state set to C3. According to RealTemp, while in a idle desktop state (no programs running besides normal background stuff), it was about 96% in core c3 state and 83% in package C2 state. (Curious it never made it to C3 at package ... I wonder if Haswell has package C3 or just C2 and then jumps to C6/7?). Vcore, whose running value is normally 1.344v, was "down volting" to a low of 0.736v. I should also mention when I do normally have C6/7 enabled, Vcore can "down volt" to a much lower value. Likely that is the case because more of the CPU is turned off when in C6/7. Package does go to C7 state in that case.
(Actually I noticed it also only goes to package C2 in that case. Investigating why....)

Also, a quick google shows someone else talking about a C7 chopping issue with a MSI board you might want to check out...

http://forums.anandtech.com/showthread.php?t=2367719

I see what you're saying. I have all C states enabled on my Asrock and have seen volt readings as low as .7-.8 range. I'm not looking for anything that low, just not wanting to run a fixed value 24/7. I appreciate the link. I'll read that more in depth. You bring up a good point about BIOS. When I installed this board I immediately upgraded to the latest BIOS.... which was probably a bad idea. This board comes with a BIOS switch so maybe I'll give the original a shot.
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post #9933 of 19603
Quote:
Originally Posted by Cyro999 View Post

JJFIVEOH, sounds to me like you are entering the states fine but reading VID instead of Vcore? 100% sure you're using right sensors?

At the moment I've been using the Intel XTU that graphs the CPU core voltage. When I use the adaptive setting in BIOS the graph does show a fluctuation in voltage. In override mode and C states enabled, the graph is completely flat.
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post #9934 of 19603
Quote:
Originally Posted by JJFIVEOH View Post

At the moment I've been using the Intel XTU that graphs the CPU core voltage. When I use the adaptive setting in BIOS the graph does show a fluctuation in voltage. In override mode and C states enabled, the graph is completely flat.

It may just be showing VID. Check cpu-z 1.64.0 (not later) and hwinfo (i'm not up to date on what software shows actual vcore for which boards, but these two seem pretty solid bet)
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post #9935 of 19603
Quote:
Originally Posted by Cyro999 View Post

It may just be showing VID. Check cpu-z 1.64.0 (not later) and hwinfo (i'm not up to date on what software shows actual vcore for which boards, but these two seem pretty solid bet)

Just downloaded Intel XTU and gave it a try. Cyro you look to be correct, XTU shows a constant Vcore (basically my VID value) while cpu-z shows the lower voltage one expects with manual mode and C states enabled.
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post #9936 of 19603
Quote:
Originally Posted by Cyro999 View Post

It may just be showing VID. Check cpu-z 1.64.0 (not later) and hwinfo (i'm not up to date on what software shows actual vcore for which boards, but these two seem pretty solid bet)

On MSI boards the latest versions of cpu-z work fine for reading vcore.
Quote:
Originally Posted by peakclimber View Post

Just downloaded Intel XTU and gave it a try. Cyro you look to be correct, XTU shows a constant Vcore (basically my VID value) while cpu-z shows the lower voltage one expects with manual mode and C states enabled.

The benchmark is more stressful than the stress test, the stress test will run for hours at voltage that will crash the benchmark in seconds.
    
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post #9937 of 19603
Quote:
Originally Posted by FtW 420 View Post

The benchmark is more stressful than the stress test, the stress test will run for hours at voltage that will crash the benchmark in seconds.

Just gave the benchmark a try: 1157 marks. Looking at records for other 4770k's on water, my score is nothing to scream about but not too bad (would rank 56 with highest at 1314 marks running at 5.1Ghz ... mine is at 4.5Ghz).
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post #9938 of 19603
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post


On MSI boards the latest versions of cpu-z work fine for reading vcore.
The benchmark is more stressful than the stress test, the stress test will run for hours at voltage that will crash the benchmark in seconds.

Can you loop the benchmark? IIRC there wasn't a way, I had to press run benchmark over and over.

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post #9939 of 19603
Quote:
Originally Posted by Cyro999 View Post

It may just be showing VID. Check cpu-z 1.64.0 (not later) and hwinfo (i'm not up to date on what software shows actual vcore for which boards, but these two seem pretty solid bet)

Quote:
Originally Posted by peakclimber View Post

Just downloaded Intel XTU and gave it a try. Cyro you look to be correct, XTU shows a constant Vcore (basically my VID value) while cpu-z shows the lower voltage one expects with manual mode and C states enabled.

Quote:
Originally Posted by FtW 420 View Post

On MSI boards the latest versions of cpu-z work fine for reading vcore.
The benchmark is more stressful than the stress test, the stress test will run for hours at voltage that will crash the benchmark in seconds.

So if I'm understanding this correctly, XTU monitors VID and CPU-Z monitors VCore. That's why when using adaptive mode the graph fluctuates ans when using fixed with C states enabled, the graph still remains flat.

Theoretically if Vcore is lowering then all I have to do is figure out why I'm getting the skipping problem and then I'll be able to OC back to 4.5-4.6 like I wanted. I might not even need to figure out why C6/C7 causes the skipping because I may already have voltage drop using C3. Hmmmm.......
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post #9940 of 19603
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Originally Posted by Darkwizzie View Post

Can you loop the benchmark? IIRC there wasn't a way, I had to press run benchmark over and over.

There isn't a way to loop it, when stress testing the 4670k I just used the XTU bench to find the vcore that it needed for stability to finish 1 run, then ran 20 loops of x264 & 10 runs of IBT max memory after that.
Then lowered vcore to where xtu bench failed instantly, IBT also failed & x264 failed on the 1st run pass 2. The XTU stress test ran for 3 hours & passed fine there.
    
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