PC Hardware forum


GTX 660 FPS in Games slowly depletes untill snails pace - HE

by iBobotastic / April 29, 2013 3:00 PM PDT

I have a EVGA Gtx 660. My processor is (sadly), an Amd a8 Black apu. My power supply is a corsair 430 watt. Before anyone says that my processor was meant to be in dual mode with the radeon 6670, I already know. Anyways, in games, they start out mostly great, with like 60 or more fps, then it slowly depletes until I'm running at like 15-30 frames. My suspicion is my power supply, could also be my processor, could you guys help? Also some games appear to be very stuttery and yet they still maintain a good frame rate.

I wanted to share these screenshots of gameplay and clock speeds as well as framerate.

Here is cod waw at the very start of the game. http://gyazo.com/e6596d72f33258f47a3c1d00664269e1 , 71 fps, cpu was acting normal. and the gpu was at normal speeds as well.

Fast forward ten minutes. http://gyazo.com/da97bfbd326b341ee677d8be70ac6dd0. 37 fps, and 300 mhz?

and here we are at 15 mins: http://gyazo.com/b5279b09c0353f531e0ed407cea43f38 17 fps

Also, it seemed to do fine under stress tests. http://gyazo.com/1de1ea6343c679033690379728bbff13 I just dont understand it. Will be doing driver updates and such now, will get back to you.

Can someone please help me? Thanks

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Here I get the opposite effect.
by R. Proffitt Forum moderator / April 29, 2013 4:16 PM PDT

I do not have your PC but as I play a game the textures and such are cached in the GPU's video memory and the speed goes up slightly.

However I run a pretty tight ship. I never use any registry optimizer (snake oil) or fell for the memory free game.

It's possible something is warming up and throttling but I can't see your PC. Did you try the usual cover off, point a fan at it test?

And why the skimpy PSU?

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Overheating tested - No good
by iBobotastic / April 30, 2013 9:19 AM PDT

I just tested putting a fan in front of it. It stayed very cool, but games still decided to run on very low framerates. It also looks like it went up to a reasonable clock speed though (1000 Mhz). Still, not good framerates, it must be my power supply. Heres a picture also, right now I have it tested with the molex adapter, no change...


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All I needed was the PSU model CX430.
by R. Proffitt Forum moderator / April 30, 2013 10:16 AM PDT
http://www.hardwaresecrets.com/article/Corsair-CX430-Power-Supply-Review/1200/7 was nice to read it really did stand up to full load. HOWEVER IT IS A SPLIT RAIL PSU with about 15A available per rail.

Usually an overloaded rail will manifest itself with issues with reboots or GPU odd artifacts. This is not your complaint.

http://www.tomshardware.com/reviews/geforce-gtx-660-geforce-gtx-650-benchmark,3297-16.html notes there is some confusion which GPU is actually use in a GTX 660.

However http://www.tomshardware.com/reviews/geforce-gtx-660-geforce-gtx-650-benchmark,3297-23.html is downright scary as we see over 200 Watts difference from idle to under load. 15A is only 180 Watts so you should question the PC's designer why they are pushing the power supply so hard. This usually results in pain in a few months.

Nothing stands out here. It is possible you are trying maximum resolution dual displays or such but from the first look, it's not the card's fault.
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Buying new PSU I guess
by iBobotastic / April 30, 2013 2:04 PM PDT

Will be ordering new PSU tonight, hope its the right decision.

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It's only an issue, I can't say it's the problem.
by R. Proffitt Forum moderator / April 30, 2013 2:27 PM PDT
In reply to: Buying new PSU I guess

It's just pushing it. Something's off but the reason isn't in the clues so far.

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