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CPU and GPU Usage dropping to 0% during gaming.

post #1 of 5
Thread Starter 
I have a couple ideas about what may be the issue, but I wanted some second opinions. I've recently built a new computer, and while gaming I've noticed reoccurring lag spikes where all graphics stop, but sound continues. During these spikes, both my GPU and CPU drop down to 0% usage, then gradually start going back up. Both GPU and CPU are overclocked, all drivers and mobo BIOS are up to date. Here is some of the experimentation I've done.

GPU & CPU OCed: Repeated lag spikes, usually about every 10 seconds.
GPU OCed, CPU stock: Intermittent lag spikes, spaced further apart.
GPU and CPU stock: No lag spikes, but frame rates will not get anywhere near my 120hz refresh rate.

Regardless of overclocking or not, all of my temps are stable below 70C at full load. No benchmarks show the same symptoms, these lag spikes only happen during actual gaming. Games I've tested include: Hawken, Warframe, and Dragon Age II.

I have a feeling the problem may be in my PSU. It's a Corsair RM650, which should be enough according to the PSU calculators, but those do not take into account GPU overclocking, only CPU.

CPU: i5-3670k @ 4.2GHz/1.2 vCore
GPU: Asus GTX 770 DirectCU II @ 1230MHz Core/8224MHz Memory
RAM: 8GB Corsair Dominator 1866MHz (2x4GB)
HDD: 120GB Samsung 830 (only used for games)
PSU: Corsair RM850
Mobo: Asus Maximus VI Formula
post #2 of 5
Reviews list max power consumption 213-220 watts for GPU, you do not list CPU Cooler, case or other parts. Assuming 180 watts total with CPU, still 400 watts. A 650 PSU working properly would have no problems. Possibilities are a "hot spot" in case caused by dead air or a poor connection come to mind.
Can you try the card in another computer?
post #3 of 5
Thread Starter 
Quote:
Originally Posted by brasslad View Post

Reviews list max power consumption 213-220 watts for GPU, you do not list CPU Cooler, case or other parts. Assuming 180 watts total with CPU, still 400 watts. A 650 PSU working properly would have no problems. Possibilities are a "hot spot" in case caused by dead air or a poor connection come to mind.
Can you try the card in another computer?

I do not have another case I can use. Both the GPU and CPU overclocks were stress tested overnight with no issues however, so I don't think the cooling is a problem. I'm using a Corsair C70 case and a H100i CPU cooler.
post #4 of 5
This sounds maybe memory or storage related to me.

is it possible you can prime95 with 90% memory coverage to see how that goes.

and then for storage, I guess unplugging whatever else you arent using to see how it goes.

You should aslo add your computer via rigbuilder and tack it in your signature, knowing what all youve got can be helpful.
post #5 of 5
Have you disabled all of the power saving features in the BIOS and NVCP?

With it only happening while overclocking, maybe something becomes unstable or freezes up for a moment while things scale down for power savings or something.

If not, give it a try. There are usually a lot, spread out in different areas of the BIOS, but you can probably find them quite easily.
Check CPU-Z when you boot up, and if it reports anything than the expected OC settings, there might be one left on you missed.
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