GPU Overclocking Help

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CoolKiller

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Mar 24, 2014
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Hi,

I recently purchased an GPU an im planning on overclocking it with MSI Afterburner
The GPU is an Gigabyte GTX 750 TI
My question is how far can i overclock my memory and do i need to overvolt anything?
Im kinda new to overclocking

Thanks!
 
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bicycle_repair_man

bicycle_repair_man

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Jan 10, 2014
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As a general rule of thumb, you shouldn't overclock a GPU beyond 20% of its stock speeds unless you have a water cooling loop. You can make voltage adjustments to help keep the temperature down, but it isn't worth the trouble. You could be testing for hours just to gain a few extra megahertz.

You may also want to download MSI Kombuster, which is a GPU stress test program. This will ensure that the overclock is stable when the GPU is pushed to 100% load.
 
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ROCKSTARhjk

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@bicycle repair man said it, well do not stress test, because when playing games ur gpu wont be used 100% and using aftificial loads to test gpu will destroy things,maybe ur gpu will die or the psu will, if it is something like seasonic x1250 or corsair ax1200i then u can try stress testing because they will make sure the gpu gets the power required as u overclock ur gpu u will see results on ur own, if it is pushed too far ur screen will go blank so u will automatically get an idea, well my advice.do not push it above 25%, even at 25% use 100% fan speed to keep the temps down, or u will end up crying
 
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bicycle_repair_man

bicycle_repair_man

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I have to disagree there. When you overclock any component it's important to test it as worst case scenario, which is always 100% load. Overclocking is NEVER an exact science and testing is absolutely essential to ensure system stability.



That's probably true, but how can you be sure? It varies from game to game and what settings you play at. There are too many variables at work to simply dismiss testing.



This is a common belief, but it isn't true. The whole point of testing is to ensure that this kind of thing doesn't happen. What exactly is the difference between an artificial load and a "real" one?



If the GPU voltage is left on automatic, the PSU will attempt to deliver the required power. This is true of any PSU, not just high-end ones with wattages that are unnecessarily high.

Testing is ABSOLUTELY CRITICAL for any sort of overclock. You'd be a fool to push something beyond its capabilities and not test it.
 
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ROCKSTARhjk

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well i am so sure that it will never be used 100% because i run dual R9 290 with and without crossfire enabled and guess what, it barely reaches 85% load on 4k

This just made me laugh; the whole point of testing is to ensure that this kind of thing doesn't happen. What exactly is the difference between an artificial load and a "real" one?
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LOL, are u a noob ?? artificial means something u will not encounter each and everyday furmark kombuster and unigine are artificial because u dont run them for 4 or 5 hours straight each and everyday
talking about real loads battle field 4 at 4k is a real load watchdogs at 4k is a real load
and i think u dont do much research before talking amd and nvidia released a statement that their cards aren't meant to be brutally murdered using these "synthetic benchmark utilities"
If the GPU voltage is left on automatic, the PSU will attempt to deliver the required power. This is true of any PSU, not just high-end ones with wattages that are unnecessarily high
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, the PSU will attempt to deliver the required power
attempt, not guaranteed, this is what kills the psu
i challenge this that u prove me that on a psu that is producing 35 amps and has 600 watts can run an overclocked r9 290 on furmark for straight 3 or 4 hours if u prove this to me that in such circumstances the psu wont die i will pay u thousand dollars
and the thing u said at the beginning stress test well, stress testing a cpu is ok because it does not require a ton of current to run
while talking about a gpu,( a chip that does parallel processing) u are at a much greater risk of blowing up the psu, i am not talking voltage i am talking power current required and the power consumption, the psu will fall short of it because load produced by these benchmark utilites is unstable, for an instance it is 100% and in the next it can fall down to 40 or 50 % again 100% is a huge spike and this increases the risk that the psu might not be able to keep up with the power requirement of the card, and MR.NOOB if ur graphics overclock is unstable then forget seeing anything on ur screen becuase it will go blank, u dont need to stress test a gpu and u can ask that from any it pro
 
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bicycle_repair_man

bicycle_repair_man

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Question my opinions if you want, but don't insult my intelligence. I'm certainly not a "noob", as you put it.

We're not talking about your high-end R9 290, we're talking about a mid-lower end GTX 750 Ti. Put that GPU in the same circumstance as yours and the load certainly won't be 85%.

The point I'm making is that anyone who overclocks should test what they've done to ensure that the PC remains stable. Do it in-game, use Furmark, Kombuster, whatever you want, just make sure you place a large load on the GPU to test for stability. I agree that a suitable PSU is required, but that's something you check before you start to overclock and nor had the topic reached that stage. You should also know that a PSU with 35A is producing closer to 400W providing it's of good quality.

OP, apologies for the hijacked thread. I'll reiterate what I said in that you generally shouldn't exceed a 20% overclock of the current speeds (core and memory) without a water loop. It varies across the board so don't be surprised if your results end up higher or lower.

I cannot emphasize just how important it is to test the overclock. You don't need to run it for hours on end; ten minutes will suffice. Just make sure the load is high and the temperature remains within an acceptable level. If you notice any instability or if the temperature gets too high, you should lower the overclock. It's all about trial and error.
 
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ROCKSTARhjk

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Jun 16, 2014
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so what u are trying to say is benchmark, "STRESS TEST" MEANS HOW LONG AT EXTREME LOAD THAT THE GPU DIES, STOP SUGGESTING WRONG THINGS TO PEOPLE BICYCLE REPAIR MAN, STRESS TEST IS TO KILL THE GPU OR CPU, BENCHMARK IS TO OBSERVE THE PERFORMANCE, U ARE OUGHT TO STATE BENCHMARK NOT STRESS TEST BECAUSE U ARE ADVISING HIM TO KILL HIS COMPUTER
 
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