Hmm, well Iv got already one Dell desktop PC GX 270, bought it a few years ago and fitted on it ATI radeon HD 2400 PRO 512 MB DDR3 AGP 8x and it works perfect with stock PSU and 2 gb of dual channel Kingmax RAMM.
I was able to play Crysis on medium settings and World of Warcraft runs smooth with 50-80 fps while in free roam and 20-30 fps while in 25-40 man dungeons/raids. (maxed out settings with AA/Shadows/sun shafts disabled)
My old GX 270 specs re:
CPU: Pentium 4 HT 2,8 GHZ
RAMM: 2 GB Kingmax dual channel DDR1
HDD: 1 TB CaviarGP SATA
GPU: ATI Radeon HD 2400 PRO 512 MB DDR3 AGP 8x
Now got this GX 620 for a very cheap price of 150 Euro with integrated 256 x600 ati grapshics and 128 MB in slot x600 SE card.
But its kinda slow and crap so was looking to get a better graphics maybe 8800 GT or HD 4350 or maybe HD 5450 card into the PC without upgrading the PSU. Those are all very cheap GPUs.... dont really know which one to get.
I dont really need and special graphics or High end graphics, just looking for a good card to be able to run movies, some of the never games and world of warcraft on it with atleast 30 FPS....