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~~The GTX 670 Overclocking Master-Guide~~ - Page 44

post #431 of 3357
I have a pair of non-top asus 670s in sli. Should the graph for cpu clock look like that or do I have a problem? This is at stock settings except for the fan profile..

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post #432 of 3357
Quote:
Originally Posted by omega4 View Post

Hello everyone. I'm new here. First, I'd like to thank the author of this post and all the mods for sharing their OC expertise. As a new owner of an EVGA GTX 670 FTW and first time overclocker, I found all your comments very educational.
I attempted my first overclock with my 670 and would appreciate it if any of the OC experts here could please answer the following questions for me:
1. Did I calculate my Kepler Boost correctly? I calculated 91 with the out-of-the-box settings and a 92 after OC.
2. Is my Kepler Boost lower than the average 670 GPU Kepler Boost or is that not an apples-to-apples comparison since EVGA already OC the card above the standard 670 GPU?
3. Are my overclocked Unigine 'Heaven' DX11 Benchmark scores average, above-average, or below-average vs. the average EVGA 670 FTW GPU?
4. Are my OC settings of +50 GPU Clock / +160 Memory Clock.average, above-average, or below-average vs. the average EVGA 670 FTW GPU?
5. Is my EVGA 670 FTW GPU average, above-average, or below-average vs. the average EVGA 670 FTW GPU?
Out of the box, my EVGA 670 FTW GPU has a GPU Clock of 1006 and Boost Clock of 1085. I believe that EVGA overclocks the 670 FTW card as my GPU clock and Boost Clock are higher than a standard out of the box 670 GPU. I believe has a GPU Clock of 965 and a Boost Clock of 1045, correct?

Welcome to OCN smile.gif

1+2) Yes, that looks correct. 91MHz is probably right in the middle in terms of average KB value for all 670's. No, the stock OC doesn't really matter in that calculation. There's reference cards with KB's of like 26MHz, and pre-OC'd cards with 143MHz KB's, for example. Pretty sure that the KB value is encoded into the chip at the factory (e.g. before it's even known what actual model it'll go into), although it can be over-ridden by editing the BIOS.
3) Your Heaven score looks about right for those clocks, yes ... maybe a tad on the low side though but I bet it's because you have that huge stutter about 4/5 of the way through it. A lot of people get a stutter there, but yours is really long. Not sure why that'd happen but I'd try it w/o OC and see if it goes away or at least becomes just a blip. Although that may just the point at which your score is being tabulated ... in which case, not that big a deal ... although it's still kinda long.
4+5) The +50 offset value is basically irrelevant, because of different cards having different KB values. The number that 'matters' is the 1227MHz OC. That's a bit on the low side, as over 1/2 of FTW's in our Stats poll are hitting over 1300. Also I've seen a lot of people getting +500MHz (double pumped speed) on the memory. So I'm sorry to say that compared to most FTW's I've seen, your card seems a bit below average redface.gif

Sometimes cranking up the fan speed will help with stability, let you eek out a bit higher OC. You also should work out a balance between core and memory, as they do seem to affect one another. Sometimes a small downward bump of one will allow the other to go much higher, which can definitely be worthwhile ...

And reference 670's are clocked at 915 base/985 boost if my memory serves. I know it's not 965/1045 as the reference, it's definitely lower ...
Edited by brettjv - 7/16/12 at 10:04am
    
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post #433 of 3357
Quote:
Originally Posted by SeanPoe View Post

That sounds like a memory leak (or fragmented memory) or something similar. Which I've never seen happen in the context of Heaven. Have you tried restarting your computer? What is your GPU memory usage at when you run heaven? Have you ever used MemTest86+ to test your RAM? What happens if you run the card at default clocks, are your scores higher and constant/stable when you do consecutive runs at default clocks?
Quote:
Originally Posted by Lutsk92 View Post

Here are one of my many results:
11u7zog.jpg
I ran Memtest86+ and here what results are:
Walltime = 1:28:00
Cached = 8154M
RsvdMem = 2828K
MemMap = e820
Cache = on
ECC = off
Test = std
Pass = 1
Errors = 237
ECC Errs = 0
Tst = 2
Pass = 0
Failing Address = 0017fb0603c - 6139.0MB
Good = ffffffff
Bad = fffffbff
Err-Bits = 00000400
Count = 1
RAM must be the problem? I need to get them replaced?


I have the exact same problem, but there is nothing wrong with my RAM.
Restarting didn't solve the problem, memory usage is 2032 MB, same problem when run at stock.

note: i crash in heaven @ stock after 2-3 hours with every setting maxed out (my temps never exceed 55 degrees)

thanks SeanPoe for your help & waiting your answer.

System: 3570K @ 4.5 GHz - Asus P8Z77-V pro - 8GB G.skill 2133 MHz - corsair force GT 120 GB SSD - Gigabyte GTX 670 OC
post #434 of 3357
Would it be safe to update the bios of a 670? are there any negative effects?
post #435 of 3357
Thread Starter 
Quote:
Originally Posted by kamalelsherif View Post

I have the exact same problem, but there is nothing wrong with my RAM.
Restarting didn't solve the problem, memory usage is 2032 MB, same problem when run at stock.
note: i crash in heaven @ stock after 2-3 hours with every setting maxed out (my temps never exceed 55 degrees)
thanks SeanPoe for your help & waiting your answer.
System: 3570K @ 4.5 GHz - Asus P8Z77-V pro - 8GB G.skill 2133 MHz - corsair force GT 120 GB SSD - Gigabyte GTX 670 OC

Well, if you tried everything i suggested to Lutsk92 with no success, then maybe try running a GPU RAM test (like this one) and let me know if you get errors at stock clocks. If you do, your only real solution is to downclock your memory until it becomes stable. But personally, i would just RMA it for a replacement if that's the case because it should be stable at stock speeds no mater what.
post #436 of 3357
Thread Starter 
Quote:
Originally Posted by thegh0sts View Post

Would it be safe to update the bios of a 670? are there any negative effects?

Yes, It's potentially safe. Just be sure to use a proper bios and back-up your original. Most manufacturers have a bios update utility, check your manufacturers website for a download.
post #437 of 3357
Hi Sean,

Thanks so much for your guide.

I have a few questions being new to overclocking GPUs

I have a pair of FTW models taht I plan to overclock

My plan is to go over the quick step with each card to understand each OC potential before SLI

My biggest question is at the end, do I run them at its individual offsets or go with the lower of the 2 GPU/mem clock offsets? If it's the latter, what happens when one card has high GPU offset low mem offset and the other card has low mem offset and high offset?

Also some basic questions regarding single card OC:

1. fan curve..it talks about fan speed as low as 10% or as high as 85%..I noticed in Precision X my FTW only ranges from 30-80%. Should my idle and load speed just be at 30% and 80%, respectively then?

2. One of my cards can hit MBF 1270-1280MHz (+120MHz) and memory 1900MHz (+700MHz..not sure how GPU-Z calculated 1900 as stock memory is 1552MHz) under 80% fan speed...once I apply the appropriate fan curve Heaven crashes but the temp is ~60C.

3. Power slider is always maxed out at 145%. Max TDP I've seen is 115%. Is there anyway to allow my card to use more power? I think that's what's trottling my OC beacuse my temp are always never higher than 61/62C.

4. When Heaven crashes it reports a Max TDP of 333%. Is that an error? I saw someone reporting similar problem in page 4-6 of this thread but he was using Afterburner and Precision X at the same time. I have a brand new Seasonic X750 so I doubt it's PSU related.

5. I noticed sometimes during heavier OC runs the power usage can dip and stay at ~80% when it's usually 98-105% which causes huge fps drops...what's causing this? I need to reboot the comp everytime this happens to benchmark properly.
Edited by twitchyzero - 7/17/12 at 12:44pm
     
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post #438 of 3357
Quote:
Originally Posted by brettjv View Post

Welcome to OCN smile.gif
1+2) Yes, that looks correct. 91MHz is probably right in the middle in terms of average KB value for all 670's. No, the stock OC doesn't really matter in that calculation. There's reference cards with KB's of like 26MHz, and pre-OC'd cards with 143MHz KB's, for example. Pretty sure that the KB value is encoded into the chip at the factory (e.g. before it's even known what actual model it'll go into), although it can be over-ridden by editing the BIOS.
3) Your Heaven score looks about right for those clocks, yes ... maybe a tad on the low side though but I bet it's because you have that huge stutter about 4/5 of the way through it. A lot of people get a stutter there, but yours is really long. Not sure why that'd happen but I'd try it w/o OC and see if it goes away or at least becomes just a blip. Although that may just the point at which your score is being tabulated ... in which case, not that big a deal ... although it's still kinda long.
4+5) The +50 offset value is basically irrelevant, because of different cards having different KB values. The number that 'matters' is the 1227MHz OC. That's a bit on the low side, as over 1/2 of FTW's in our Stats poll are hitting over 1300. Also I've seen a lot of people getting +500MHz (double pumped speed) on the memory. So I'm sorry to say that compared to most FTW's I've seen, your card seems a bit below average redface.gif
Sometimes cranking up the fan speed will help with stability, let you eek out a bit higher OC. You also should work out a balance between core and memory, as they do seem to affect one another. Sometimes a small downward bump of one will allow the other to go much higher, which can definitely be worthwhile ...
And reference 670's are clocked at 915 base/985 boost if my memory serves. I know it's not 965/1045 as the reference, it's definitely lower ...

Thank you sir for sharing your insights on my GPU. I really appreciate the information that you've shared with me, as well as your generosity of spirit and time. Thank you very much again!
post #439 of 3357
Thread Starter 
Quote:
Originally Posted by twitchyzero View Post

Hi Sean,
Thanks so much for your guide.
I have a few questions being new to overclocking GPUs
I have a pair of FTW models taht I plan to overclock
My plan is to go over the quick step with each card to understand each OC potential before SLI
My biggest question is at the end, do I run them at its individual offsets or go with the lower of the 2 GPU/mem clock offsets? If it's the latter, what happens when one card has high GPU offset low mem offset and the other card has low mem offset and high offset?
Since you're planing on taking the time to overclock both cards individually anyways, then it would be best to uncheck the 'SYNC' box on the main-page of Precision-X, and keep both cards at their respective maximum overclock. All that's going to happen is the card with the faster overclock will run at a lower load (instead of 100% usage, it will be at 90-95% usage). You won't see a huge performance difference doing it this way (since your FPS will be limited by the lower-clocked GPU) but it can help out your minimum FPS in some cases. Also, if you swap the better performing card to the first slot in your SLI-array, then you will see a small performance boost too (less than 1%).
Quote:
Also some basic questions regarding single card OC:
1. fan curve..it talks about fan speed as low as 10% or as high as 85%..I noticed in Precision X my FTW only ranges from 30-80%. Should my idle and load speed just be at 30% and 80%, respectively then?
Yes, that's exactly what you'll need to do.
Quote:
2. One of my cards can hit MBF 1270-1280MHz (+120MHz) and memory 1900MHz (+700MHz..not sure how GPU-Z calculated 1900 as stock memory is 1552MHz) under 80% fan speed...once I apply the appropriate fan curve Heaven crashes but the temp is ~60C.
How long did you run Heaven at 80% fan speed with those same settings? My guess is it just wasn't stable at those settings and it was just a coincidence that it crashed with the altered fan settings. Try running Heaven in a loop for about 2 hours at 80% fan speed and see if it doesn't crash.
Quote:
3. Power slider is always maxed out at 145%. Max TDP I've seen is 115%. Is there anyway to allow my card to use more power? I think that's what's trottling my OC beacuse my temp are always never higher than 61/62C.
Nope, you can't increase the amount of power your card uses aside from just maxing out the power slider. If your power target is set to 145% and you're only seeing 115%, then i really doubt you're being throttled by power. You only get throttled for going too high, not for being too low. Did you check the graphs to see if you're indeed being throttled?
Quote:
4. When Heaven crashes it reports a Max TDP of 333%. Is that an error? I saw someone reporting similar problem in page 4-6 of this thread but he was using Afterburner and Precision X at the same time. I have a brand new Seasonic X750 so I doubt it's PSU related.
Definitely sounds like an error to me. I would recommend closing all other GPU monitoring tools (like GPU-Z, aferburner, motherboard programs, etc) because if you have more than one open it can cause mis-readings and crashes.
Quote:
5. I noticed sometimes during heavier OC runs the power usage can dip and stay at ~80% when it's usually 98-105% which causes huge fps drops...what's causing this? I need to reboot the comp everytime this happens to benchmark properly.
I don't know exactly what causes this. It's something to do with the card being locked into 2D mode when it should be in 3D mode. I've only seen it happen in Heaven. I know that alt-tabbing out of Heaven will cause this, but aside from that, it just seems to randomly happen. Whenever it happens, just restart your computer and try again.
Edited by SeanPoe - 7/17/12 at 5:04pm
post #440 of 3357
Got my second evga gtx 670 ftw today.

Here is sli result,

http://3dmark.com/3dm11/3909096
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