FPS lag every few minutes

May 20, 2011 at 09:39:54
Specs: Windows Vista
For the past week or so, EVERY game that I play seems to have FPS lag for a few seconds or minutes, then returns back to normal then lags again.

These are new and old games, games which have never lagged before.

I've checked my CPU temperature and it's fine, I've closed every single process down that I was running apart from the game, done Virus scans, opened the computer up and blew out all the dust, cleaned the fans and still, every game lags.

Whether it's Fallout 3, Age of Empires II, it doesn't matter they all lag.

My specs are as follows: -

Microsoft Windows Vista 32-bit
3.00 GB RAM
Intel Core 2 Duo E6550 @ 2.33 GHz
NVIDIA GeForce 9500 GT

I've updated all the drivers, I've had this desktop now for about 4 years and never had this problem before, games that I could play without a problem 2 years ago and now having problems.

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May 20, 2011 at 11:33:26
Virus scans often miss malware/spyware. Try installing & running Malwarebyte's Anti-Malware:


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May 20, 2011 at 14:46:19
How large is the power supply?

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May 20, 2011 at 14:52:11
No idea how large the PSU is, it's a Compaq Presario SR5139UK Desktop PC

Defiently not a virus problem, I've scanned with Kaspersky, Malware and Xsoftspe


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Related Solutions

May 20, 2011 at 15:30:52
it's a 300w supply. I'd wager after 4 years it's not even that. You might look into something newer and find an unexpected performance improvement.

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May 20, 2011 at 17:17:34
Upgrading the PSU will NOT improve performance.

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May 20, 2011 at 20:56:39
Do disk clean up and defrag.

How are you monitoring temperatures? What temperatures? Use Speedfan and monitor CPU core, 'other' (chipset, etc), and even GPU temperature.

You have to be a little bit crazy to keep you from going insane.

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July 27, 2011 at 04:20:07
I know its not usually the sort of thing many people have spare, but if you happen to have a spare IDE/SATA hard drive, make a hard drive image (google for freewares to do this) and transfer it to the other hardrive, boot up your PC with the new HDD and test, if it works you have a hard drive hardware fault.

The easier and more logical way of doing things would be to run a Disk Defrag first and foremost, use Performance Monitor (perfmon.msc) and set up counters to monitor all hard disk activity, schedule it to run for a set duration while you play your games. Then return to the monitor and analyse the results, especially for HDD read/write rates, if you see spikes that are non consistent then theres definately a problem somewhere, my conclusion to this would simply be a re-installation of everything, if gaming is your only use for a PC of course, otherwise I would wait for another response if you have too many files to mess about with backing up etc.

Edit: The spikes could also be caused by virus/malware, as it indicates additional processes along a line of one constant process, causing the jumps

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