Random Spikes of FPS Drops in games.

iScreamMan

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May 23, 2013
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10,510
So about a month ago I was able to play all my games on my PC fine. I don't have the most amazing setup but it is as follows:

AMD Phenom IIx4 965 Processor 3.40 GHz
8.00 GB RAM
Running Windows 7 Home Professional 64 bit
And I did have 1; Radeon HD 6850 1GB GDDR5 for graphics
My power supply is an Ultra Power Supply if I recall it is 750 watts. Don't think this matters but I'm listing it so people know.

Now for the past week or so I've been getting some weird issue that I haven't been able to figure out what exactly happened. Games that I was playing that I know I can use as an example were League of Legends and Grand Theft Auto 4 + Episodes from Liberty City. They played fine, mostly above 60 fps with some drops of maybe 5 fps here and there but that's normal with my setup.

However I stopped playing the games for a bit and came back and for some reason at certain times the FPS meter will go from 60+ to maybe around 4 or 3. I ignored it the first time but then it started to just keep happening. It doesn't happen too often but it seemed to be when there is a lot of effects and the like going on. It will only last about 3 to maybe 8 seconds too with the program (whichever game it was) spiking in usage on my pc from maybe 30-40 to 70-80. On GTA 4 it happens more frequently.

I ran a program called speed fan to find out my computers temp and speeds while the problem occurred. It doesn't seem that the temperature increases but I understand that it may not be noticeable. I realized that my graphics card fan was running fairly high and I did feel it was time to upgrade my card. So I went ahead and bought a new card; GEFORCE GTX 660 Superclocked; 2GB GDDR5. I figured it would solve my problem but it didn't. I then ran defrag's and just registry cleanups not really expecting everything but just for good measure.

The problem did not stop. Now another game I play is Warframe and I did not ever notice the problem happening on there. So my friends noticed that I had Warframes VSync Option on Auto so it would automatically set it to however my graphics card would set it by default. I then proceeded to try this on League of Legends and it seemed to not occur again on there for the time being. I will continue to keep the option on to further test.

The thing is though, why am I suddenly having to run VSync on games that I didn't before? I am still going to use my GTX 660 since it's just a good upgrade. I have purchased Compressed Air and Thermal Paste to clean up the inside my PC and just waiting for them to arrive. I am unsure if this will help though. I am hopeful, but doubtful too. My PC isn't too old either maybe 2 years max so I figure the thermal paste would be fine but there's no use in not trying.

Basically I'm just looking for more opinions and possibly an idea of what could be wrong. I figure if my Processor is dieing out or something, it wouldn't just be randomly on a game for a few seconds and then go back to being fine.
 

iScreamMan

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May 23, 2013
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Well I hadn't tried one game with VSync yet; went on to change the settings and realized it was on the whole time. Apparently the problem seems to have stopped on League of Legends but on GTA the problem still persists. Tried it while it was off and the problem still did occur. My driver is 305.27. I will try that and see what happens.

I received the thermal paste I ordered today and will go out to buy some compressed air as well and try to clean out the computer to see if any fans are being blocked badly. Thank you for the reply I will let you know how it goes.
 

iScreamMan

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May 23, 2013
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10,510


Yes GTA is a very poorly coded game for PC. The thing is I was playing it fine before-hand and I did update the drivers on my old card. That is just one example I can describe to explain the issue. I did try as you suggested with VSync but that did not work. I am updating drivers I had no idea I was that far behind. Thank you for that. This NVidia Experience is actually a really nice tool.

The problem is just odd. So far it has not occurred on League of Legends since I started using the VSync. However I will try it again later today with the Adaptive VSync option applied as you suggested.
 

iScreamMan

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May 23, 2013
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Well everything seemed fine for a day or two. Now it's started again. I still have yet to clean the interior of my case and would still like to see if there is just some blockage somewhere. Still am not sure if that would fix the issue though.
 

ElMoIsEviL

Distinguished
Have you tried swapping out your power supply for another one? When a power supply is beginning to fail it will often begin to provide unreliable amounts of power. This could cause what it is that you're experiencing.

Another thing could be overheating of the CPU. Have you checked the temperatures?
 

iScreamMan

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May 23, 2013
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10,510


Yes and the temps are normal. However, the spike could be so minimal and not long enough to notice a temperature increase. I do have thermal paste that I will try to replace the old and I will try cleaning out the pc. My power supply may be a problem too but I have no other one to use to test this out. The one I have is good under warranty until 2017 or something so if that's the case then I'll be fine to send it back. But first I must try everything else since I cannot test this.
 

iScreamMan

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May 23, 2013
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10,510
Well I have still not found a solution for my issue.

EDIT:

I have run a program to check voltage. All the voltage is fine on my computer along with temperatures and fan speeds. I am still stumped...