Overclocking my rig - rough gains?

pengjn · June 3, 2016

I built my rig in January in anticipation of Oculus Rift CV1 coming out (probably should've waited but didn't think 1080 Pascal cards would be out until late 2016 but never mind). I've got a 4790k with a Corsair closed loop water cooler and an EVGA 980Ti Hybrid which has a built in in closed loop water cooler. I've just received my CV1 and played a little DCS and i'm surprised by how well my rig is performing but I do get some judder looking to the sides when flying low over Vegas. Will I see much improvement if I OC my CPU and gfx card and if so roughly what sort of % gains are we talking about?

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GeorgeLKMT · June 3, 2016

This might help: http://forums.eagle.ru/showthread.php?t=157374

pengjn · June 3, 2016

This might help: http://forums.eagle.ru/showthread.php?t=157374

Thank you, very useful. My take on it is that I should crank up CPU speed as much as possible but upping the GPU speed won't help much. It also suggests, if I've understood well, that I should've probably bought a 6700 CPU in favour of the cheaper 4790 but a cheaper GPU. DOH!!! Got them the wrong way around.

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dburne · June 3, 2016

You have a cpu that, along with the Corsair cooler, is just begging to be overclocked. It will overclock very nicely for a substantial gain, that is where your performance increase will come from. The difference you see in overclocking the GPU however would be minimal.

I have a 4820k processor along with the Corsair cooler, and it has been running flawlessly for me at 4.50 Ghz. Makes a big difference.

About all you would need to do is up the cpu multiplier.

pengjn · June 3, 2016

You have a cpu that, along with the Corsair cooler, is just begging to be overclocked. It will overclock very nicely for a substantial gain, that is where your performance increase will come from. The difference you see in overclocking the GPU however would be minimal.

I have a 4820k processor along with the Corsair cooler, and it has been running flawlessly for me at 4.50 Ghz. Makes a big difference.
About all you would need to do is up the cpu multiplier.

Cool. I'll give it a go this evening and see how I get along. What benchmarks do you use to see the benefits?

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dburne · June 3, 2016

Cool. I'll give it a go this evening and see how I get along. What benchmarks do you use to see the benefits?

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I myself do not really use a benchmark to test for benefits, I base it more on the performance gains I see in the games I play.

However, I do use a stress test after each change to test for stability at the overclock setting I chose.

I would up it a little at a time, testing in between for stability.

LinX and Prime95 are two good ones for cpu stability testing, I personally use LinX most times.

I would up it a little, run the stress test for about half an hour, if no errors up a little more, etc. Once I reached a comfortable overclock, I would then test it for an hour or two to make sure.

The sweet spot for my 4820K was 4.50 Ghz, anything more at all resulted in throwing errors during the stress test. 4.50 Ghz I can stress it all I want with no errors. Now I could probably have thrown some significant cpu voltage at it to try and get it stable at say 4.6 ghz, but the little gain I would see was not worth it to me.

Malefic Rage · June 4, 2016

As dbrurne said, overclocking your CPU is quite feasible. Especially with a liquid cooler. I've heard of people getting 5Ghz stable. IMO the best way to test stability is the Intelburntest. That completely murders your CPU. If anything is going to test if it is stable, run that for a few hours. You'll know. Use a program called Speccy. It gives you real-time readings of the individual core speeds and temperatures. You essentially want it to stay in the low-mid 70s (Celcius). Going above 80 is bad. It will shorten the life of your CPU and potentially damage it if exposed to that temperature for longer periods. As for your 980Ti. That should be fine.

P.S. I'm envious of your specs. :)

Demon_ · June 4, 2016

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Edited June 8, 2016 by Demon_

BitMaster · June 4, 2016

My gain with oc is roughly 1/3...from 3.8-to-4.8. Yours might be less as you start at 4.4 default Boostclock but you should still gain some more juice to even it out when looking sideways ;)

Honestly, OC'ing the GPU only makes sense if you have a SLOW GPU (you dont ) or if you have a CPU that hits or exceeds towards the 5GHz range.

I do not gain any noticable fps when switching my GPU on-the-fly during in-cockpit from 1350/7000 to 1500/8000. The CPU at 4.8 is NOT fast enough to make use of the faster GPU.

usually my GPU is somewhere beween 38-68%, hardly ever the GPU hits 99% where I say there you woulf need more GPU cycles or better GPU to gain more fps.

With a 980GTX or better...and 1440p...you need a damn fast CPU to produce enough drawcalls

to make the show happen, the GPU is not the bottleneck, it's DCS's way of working with the CPU in conjunction with how DX9/DX11 handle that, still...all CPU dependant first place !