I OC-ed my CPU ( Intel Pentium Dual Core E5300 2,6 GHz) and decided to test it. So I played CoD: Black Ops and get some 35-43-50 FPS and then I again with stock clock 2,6 GHz I get 51 FPS and something like that. It was OC-ed to 3,055 GHz and the fan was on 100% all the time. So why do I get lower FPS with OC-ed CPU then with stock CPU?
Sorry about my English.
Well, you must stress your CPU first with Prime95 for about 30-60 minutes to see whether it's stable or not...
Remember to manually adjust the VCore, do not let BIOS set it to auto.
Also check your cpu temps, make sure it's not an overheating.
I did OC-ed my video card ( 645 MHz GPU/ 450 mem).
CPU: Intel Pentium Dual Core E5300 now again at 2,6
Video Card: Sapphire Radeon HD 4350 512 MB DD2
Mobo: Gigabyte G31M-ES2L
RAM: 2GB DDR2 800 MHz
HDD: 320 GB SATA Hitachi 7200 rpm
some Frontier PSU
and I don`t know anything else .
You're quite right there, with your current specs (especially HD4350), I think your result is about right, got 26-33 fps at 800x600.
Try play at higher resolution (1024x800 or 1280x1024), see how much fps do you get.
If you want to play with better fps you must get a new graphic card (at least HD4670/HD5670 or GT240), I'm pretty sure you can get higher fps, HD4350 is not a gaming card (it's a HTPC card).
GTX460 or HD5750 (faster than GT240/HD5670) needs 450W+ PSU with (trusted brand), you have frontier PSU, I don't know about the details, so I won't run any card higher than GT240 or HD5670 with that PSU...
Yes, technically you can use HD5750 with that PSU, but since that's an unknown brand then I think you'll better with HD5670.
Do not spend more money, HD5670 is more than enough, I guarantee that you'll see a huge performance increase from HD4350 to HD5670.