[Anon3mous1]

Alright, so this is my first serious overclock and I'm a bit confused.

I've been slowly stepping up the clock multiplier, stress testing with 10x Intel Burn Test at Very High stress level and gradually stepping up v-core voltage when I encounter instability. At the moment I'm sitting on 46x multiplier with a v-core of 1.37V and as far as I can tell it's pretty stable - Intel burn test x20 at Very high, System Stability test AIDA64 for 20 minutes, a few hours of gaming (I haven't done a full 24hr burn test yet so I'm not 100% sure it's stable, but I want to be sure I have a safe voltage before I do that). Temperatures sit at around [email protected] and [email protected]% with occasional spikes to 87C.
Idle:

Loaded:

Temperatures:



Anyway, after some research, people seem to be saying that 1.3V is nigh impossible with closed loop cooling solutions, but I'm doing 1.37 without any problems. 1.37 also seems to be quite a high voltage for the core speed I'm getting, but any lower and I run into instability... My confusion is compounded by the fact that AIDA64 is reading the voltage as 1.016V which is far too low for the temps I'm getting.


Can someone shed some light on this for me?

 

[BeastRider]

I've never used AIDA but seeing HWMonitor and CPU-Z it looks like your voltage is at 1.372 just as it says. Also if you're using IBT then expect your temps to be WAY WAY higher than they would be during everyday use meaning you still have quite a bit of headroom temperature wise unless you're weary of increasing your voltage any higher. I used PRIME95 to check OC stability but really the best way is to check for WHEA warnings in your event viewer and playing games to make sure your CPU doesn't crash. Also keep in mind that there are other voltages you can tweak to help stability without increasing CPU voltage, mainly decreasing PLL. At least it helped with me, granted I'm using a different chip all together.

Hope this helps. Cheers.

 

[Anon3mous1]

Quote:

Originally Posted by BeastRider

I've never used AIDA but seeing HWMonitor and CPU-Z it looks like your voltage is at 1.372 just as it says. Also if you're using IBT then expect your temps to be WAY WAY higher than they would be during everyday use meaning you still have quite a bit of headroom temperature wise unless you're weary of increasing your voltage any higher. I used PRIME95 to check OC stability but really the best way is to check for WHEA warnings in your event viewer and playing games to make sure your CPU doesn't crash. Also keep in mind that there are other voltages you can tweak to help stability without increasing CPU voltage, mainly decreasing PLL. At least it helped with me, granted I'm using a different chip all together.

Hope this helps. Cheers.

Thanks for the swift reply. What specifically should I be looking for in the event viewer? Also, my question was more specific to this chip, most guides seem to suggest 1.25V as the thermally limited max voltage without de-lidding the processor. Either my chip is performing thermally way above it's bin or something fishy is going on...

Also what's the difference between v-core and VID? I set v-core to 1.372 but vcore is at 1.018V and VID is at 1.372.

 

[BeastRider]

Quote:

Originally Posted by Anon3mous1

Thanks for the swift reply. What specifically should I be looking for in the event viewer? Also, my question was more specific to this chip, most guides seem to suggest 1.25V as the thermally limited max voltage without de-lidding the processor. Either my chip is performing thermally way above it's bin or something fishy is going on...

Also what's the difference between v-core and VID? I set v-core to 1.372 but vcore is at 1.018V and VID is at 1.372.

You should check under the System tab for any WHEA log warnings. They should say something like "Windows detected an error with a core and fixed it" or something like that. When this happens that means you need to add more voltage to the CPU. There are times when stress testing is successful but you'll get a ton of WHEA warning which will lead to games crashing and things like that. Each processor is different so there is really no way to give a certain "max voltage" aside from what is indicated by Intel which is usually 1.5v and you will never really reach that since your temps will be too high before getting anywhere near 1.5v. You're max voltage will be the most voltage you can use within acceptable temperatures. 1.37v @ mid 80 degrees like you have now sounds like your max voltage/temperature limit since going any higher would overheat your processor.

1.372v is your real voltage as indicated in CPU-Z and HWMonitor. Try this thread to help answer your question regarding VID vs vcore. http://www.overclock.net/t/1152902/vid-vs-vcore

 

[ep45-ds3l]

AVX instructions enabled? Your GFLOPS should be way higher than that..

 

[Anon3mous1]

Quote:

Originally Posted by BeastRider

You should check under the System tab for any WHEA log warnings. They should say something like "Windows detected an error with a core and fixed it" or something like that. When this happens that means you need to add more voltage to the CPU. There are times when stress testing is successful but you'll get a ton of WHEA warning which will lead to games crashing and things like that. Each processor is different so there is really no way to give a certain "max voltage" aside from what is indicated by Intel which is usually 1.5v and you will never really reach that since your temps will be too high before getting anywhere near 1.5v. You're max voltage will be the most voltage you can use within acceptable temperatures. 1.37v @ mid 80 degrees like you have now sounds like your max voltage/temperature limit since going any higher would overheat your processor.

1.372v is your real voltage as indicated in CPU-Z and HWMonitor. Try this thread to help answer your question regarding VID vs vcore. http://www.overclock.net/t/1152902/vid-vs-vcore

Thanks, I'll work on the fine tuning now

Any tips on where to start with the fine tuning?
Quote:

Originally Posted by ep45-ds3l

AVX instructions enabled? Your GFLOPS should be way higher than that..

How do I check? I got [email protected] GHz and not [email protected] so it seems to be scaling properly...

 

[ep45-ds3l]

Are you running SP1 on your win 7 install? Also when stress testing please use manual vcore until you have reached stability at the speed you are trying to obtain.

 

[skyn3t]

Quote:

Originally Posted by ep45-ds3l

AVX instructions enabled? Your GFLOPS should be way higher than that..

the only way to get those high Gflops if he disable HT

with HT on you only get 50% on that because HT is 8 threads so you know what i mean now

 

[Anon3mous1]

Quote:

Originally Posted by skyn3t

the only way to get those high Gflops if he disable HT

with HT on you only get 50% on that because HT is 8 threads so you know what i mean now

So if I disable HT my total GFLOPS will increase and video rendering performance?

 

[ep45-ds3l]

Okay.. but umm that seems really low to me?? My 3770k @4.8ghz/HT on

 

[Anon3mous1]

Quote:

Originally Posted by ep45-ds3l

Okay.. but umm that seems really low to me?? My 3770k @4.8ghz/HT on

I'll retry the test at standard and see if that changes the result - what's your Ram speed?

 

[ep45-ds3l]

Ram is 1600mhz.. Just ran the test on standard to finish a couple quick runs and show my avg GFLOPS. I'm pretty sure your 4770k should be around 100GFLOPS or so at stock speed..

The only thing I can think of is if you didn't update Win 7 to SP1 some AVX instructions won't work on the bench test or maybe you have HT disabled in your BIOS?

1.37 Vcore on a 4770k should make a very hot CPU.

http://www.overclock.net/t/1411077/haswell-overclocking-thread

 

[skyn3t]

Quote:

Originally Posted by Anon3mous1

So if I disable HT my total GFLOPS will increase and video rendering performance?

off course not it only get divide by the amount of core

 

[Anon3mous1]

Quote:

Originally Posted by ep45-ds3l

Ram is 1600mhz.. Just ran the test on standard to finish a couple quick runs and show my avg GFLOPS. I'm pretty sure your 4770k should be around 100GFLOPS or so at stock speed..

The only thing I can think of is if you didn't update Win 7 to SP1 some AVX instructions won't work on the bench test or maybe you have HT disabled in your BIOS?

1.37 Vcore on a 4770k should make a very hot CPU.

http://www.overclock.net/t/1411077/haswell-overclocking-thread

Dropped it back to [email protected] for stability - still only 60GFLOPS:

Quote:

1.37 Vcore on a 4770k should make a very hot CPU.

I know right? but I'm only getting mid 80's with a Crossair H110 cooler. Doesn't seem right... Could the temperature sensors be faulty? I'm not getting any throttling and TJ max is set to 100C.

 

[skyn3t]

Quote:

Originally Posted by Anon3mous1

Dropped it back to [email protected] for stability - still only 60GFLOPS:

I know right? but I'm only getting mid 80's with a Crossair H110 cooler. Doesn't seem right... Could the temperature sensors be faulty? I'm not getting any throttling and TJ max is set to 100C.

If you disable HT you going to get the +100's

 

[BeastRider]

Quote:

Originally Posted by Anon3mous1

Thanks, I'll work on the fine tuning now

Any tips on where to start with the fine tuning?

After you've made sure that your stable using stress testing tools, head to event viewer under system logs and look for the WHEA warnings I told you about. You should not see any of them otherwise you'll get issues like games crashing etc. After you've gotten rid of those WHEA warnings (usually by increasing voltage but I feel you're at the ceiling right now) then start running games and playing for a while, if you can game for 2 hours + I'd consider that stable. If you can't get the WHEA warning out of the way then you might have to consider lowering your OC by x1 multiplier sadly, unless you're okay with your CPU crashing once in a while. If you have no more WHEA warning but you find your games crashing, what I did was lower my PLL a tick until the crashing stopped, it's known to help with high overclocks.
Quote:

Originally Posted by Anon3mous1

Dropped it back to [email protected] for stability - still only 60GFLOPS:

I know right? but I'm only getting mid 80's with a Crossair H110 cooler. Doesn't seem right... Could the temperature sensors be faulty? I'm not getting any throttling and TJ max is set to 100C.

You could have struck gold with your CPU, I don't know of many Haswell based CPUs hitting 4.6 with your temps. Usually 4.4 is what I'd say the average is.

 

[ep45-ds3l]

You should absolutely be over 100 gflops with HT on. Ugh..

 

[Anon3mous1]

Quote:

Originally Posted by ep45-ds3l

The only thing I can think of is if you didn't update Win 7 to SP1 some AVX instructions won't work on the bench test or maybe you have HT disabled in your BIOS?

Ahh, that's probably it, I just did a fresh install as this is new hardware, I'll make sure it's up date now.

 

[Forceman]

Quote:

Originally Posted by Anon3mous1

Dropped it back to [email protected] for stability - still only 60GFLOPS:

I know right? but I'm only getting mid 80's with a Crossair H110 cooler. Doesn't seem right... Could the temperature sensors be faulty? I'm not getting any throttling and TJ max is set to 100C.

Get AVX turned on and you won't be in the mid-80s any longer, you'll be in the mid-90s or higher.
Quote:

Originally Posted by skyn3t

If you disable HT you going to get the +100's

IBT handles Hyperthreading without a problem - you should be getting 120+ (with very high selected) at 4.6 even with HT turned on. HT off does give you higher GFlops, but it isn't doubled in IBT the way it is in the Intel Linpack script.

For example, 4770K @ 4.4 with HT on:

 

[Anon3mous1]

Quote:

Originally Posted by Forceman

Get AVX turned on and you won't be in the mid-80s any longer, you'll be in the mid-90s or higher.

I can't find a setting for AVX in the UEFI... Might it be called something else?