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 Posted: Sat, 28th May 2011 23:56 Post subject: GPU Overclocking - 560 ti |
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Making this thread so we don't completely de-rail the battlefield 3 thread. 
| Radicalus wrote: | | tskiller wrote: | | Radicalus wrote: |
I can write a quick guide here myself, overclocking these puppies is easier than ever these days. But before I do, I'd like to ask you two things: what's your experience with overclocking? How good is the airflow in your case? What's the wattage on your PSU? - even a small amount of voltage increase drains a lot more juice, and you need a good PSU, I'd say 550 W at least from a reliable company or 600+ from a cheaper one. |
I'm pretty experienced in CPU overclocking (got my 920 up to 4.5) but I've never done GPU overclocking before. My case airflow is great, got a haf 932. I've got a good quality power supply, enermax, but its only 500 watts. |
OK, since we're off topic here (thanks aeon, didn't notice by myself), make a thread about your 560 in the PC games technical forum, I'll drop by, and post a quick guide right there. I prefer this method to communicating through private messages, as others can drop by this way and give tips (better than mine perhaps) and we'll all be off better for it. |
thanks for the help, Radicalus!
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| Posted: Sun, 29th May 2011 01:03 Post subject: |
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First off, you will need some software, before we get to work.
MSI Afterburner: download the latest Afterburner beta, found here - http://event.msi.com/vga/afterburner/images/MSIAfterburnerSetup220Beta.zip
this is the general OC tool
MSI Kombustor: http://www.geeks3d.com/20110407/download-msi-kombustor-2-0-2/
this is MSI's stress test and benchmark tool - this will be used to test stability
GPU-z: http://www.techpowerup.com/downloads/1978/mirrors.php
this is a very good information utility to keep track of how your GPU is faring.
The basic principle is simple, first off, set a target frequency you want for your GPU, and then try to come as close to it using the smallest amount of voltage increment as possible, all the while keeping the OC stable(no artifacts, no black screens, resets, all that jazz) and keeping the temperatures safe.
A good target frequency for an 560 ti is around 1 GHz. Some people claim they took it as far as 1040 mhz, I couldn't get it past 1020 no matter how high I got the voltage (within reasonable boundaries of course). It very much depends on the individual chip you have, you might be luckier with it, or less so, it's important to note, than you might not even reach 1 GHz, and it's not because you are doing something wrong, it's because you simply might not have gotten lucky with your chip.
So the basic workflow is this: fire up afterburner, dial in your desired OC settings, click apply. Have GPU-z running in the background at all times, it gives you realtime information about everything, whether your core and memory speeds, temperatures, current voltage, all that stuff. Now that you have an OC set, you have to test it, that's what kombustor is for. Run the program, and set it up to your resolution, around 4xmsaa and post-fx, as well as d3d11 for your d3 api. Then use GPU burn in, and let the testing commence. You will notice if it's not a stable OC (artifacts popping up, hard reset, what I said before), you will also see temperatures, I suggest keeping it under 80-82 (in a gaming environment, even at full load, it wouldn't pass 72-74 if in kombustor you get 80-82 - kombustor pushes it to the limit). So, the goal is to find a stable and safe OC using this basic workflow. Important note - to make sure it runs stable, I suggest running kombustor without problems for at least 10 minutes per increment, and 30 minutes - 1 hour with the final OC, before you can be assured it really is stable.
Don't overclock your core clock and your memory clock at the same time. Start with the core clock, make it stable, and only when you're happy with what you have on your core clock should you move on to testing the memory clock.
The first step I advise you to do, is see how high you can go with the core OC without increasing voltage at all. IIRC I got up to around ~960 - some went up to 975 (real nice). You find this maximum, by going up in increments of around 20 MHZ (starting from 920, this it simply has to be able to do without voltage increase), until you have stability problems. Once you have stability problems, decrease by 5 mhz, until you are stable.
Once you find the highest stable core speed without a voltage increment, you should start increasing the voltage. At default, 1012 mvs is the core voltage, and it increases in steps of 12-14 mvs. So, what you do is, you increment your core voltage by one step, and try to find out how high you can get your core clock speed stable, using the method I described above.
I suggest not going above 1100 mvs (at least not without using custom fan speed settings). Also, with each increment of the voltage, remember to check the temperatures, make sure they are below or at highest ~82-83 C at full load in kombustor.
If you reach a stable core speed, that you simply can't push any higher, no matter the voltage you apply, then you have reached the limit you can OC to (or if you reached your desired core speed). At this point, stay at this core clock speed, and try and decrease the voltage to the lowest possible with it being stable. Once you think you have it, test stability in kombustor for at least 30 minutes instead of the usual 10, just to be extra sure
For me, the core speed is 1020 mhz and 1062 is the voltage I used. With these settings, and default fan speed settings, I don't get past 70 C in any game at full load.
Once you nailed your desired core you can start OC-ing your memory. Same method, only, you don't have to set voltages. Make sure you test for stability after each increment of about 30 MHZ, I'd say you can safely start at 2200 MHz, and go from there.
If your card runs too hot, it might downclock itself to stay within safe temperatures, you cal always consult GPU-z to see if anything like that happened, or if your card held the OC in a stable manner. Should you stay around and below 80-82 C in kombustor, this won't happen.
Your PSU. If this happens: you increase your voltage, while tweaking your core clock, and you get a hard reset of your PC, it might be your PSU, not your card, that is holding you back. Usually, when you OC your core too high, it will simply reset to default values, but you won't get a reset. (kombustor will crash though). NOTE: when OC-ing your memory, if you overclock it, you might get har-locks of your computer (and the GPU fan going at 100%) - but it won't reset by itself. So you should be able to notice the difference, and what's causing it.
I think this covers most angles, but here's the deal, this guide is a bit time consuming, there are ways to cut corners, but I wanted it to be extra safe. Yes, if you feel cocky, you can increment by larger steps, or dial in 1 ghz and 1100 mvs straight away, and work your voltages down from there, but that's not as safe. Your choice!
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| Posted: Sun, 29th May 2011 01:10 Post subject: |
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this should be in the PC Hardware section
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Werelds
Special Little Man
Posts: 15098
Location: 0100111001001100
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| Posted: Sun, 29th May 2011 02:19 Post subject: |
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The principles above apply to any graphics card 
Find max core on stock voltage, then for the memory do the same. Test them together, and then start cranking the voltage. If voltage can't fix artifacts anymore, try lowering memory clock; often it's ecc kicking in, and most cards aren't bandwidth limited anyway.
In a nutshell, that is the quickest way to determine a reasonable maximum
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| Posted: Sun, 29th May 2011 03:09 Post subject: |
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Awesome, thanks for the guide! Probably gonna get started on this in the next day or two, I might also hop over to micro center and pick me up a beefier PSU just to be safe.
i7 5820k @ 4.4 || MSI X99S XPOWER AC || Samsung XP941 256GB M.2 SSD || G.SKILL Ripjaws 4x4GB 2666 DDR4 || Gigabyte GTX 970 GAMING-4GD || Dell 2407 || Razer Blakcwidow Ultimate || Logitech G502
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| Posted: Sun, 29th May 2011 22:45 Post subject: |
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Those who want to OC their Reference GTX 570´s, should prepare for explosions. I only suggest overclocking with stock voltage. Reference 570 has so crap VRM chips. Gainward , MSI , ASUS uses custom PCB´s on their GTX 570´s (DCuII, Phantom Etc..), those are safe to overclock.
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