My graphics card is an ati radeon HD 4850. On the ati site it says they recommend 450w power supply, but I looked up my pc model number and it says my pc has 350w power supply. The card was built into my pc because I had it custom built on the hp site and I've been playing games with no problems for over a year now. How come the card works just fine if I supposedly have less than the recommended power supply? I'm looking at upgrading to the nvidia gtx 560. It also recommends 450w. Could I use that card on my pc if I had no problems with the hd 4850?
My specs are
HP Pavilion Elite e9300z
Processor: AMD Phenom(tm) II X4 965 Processor 3.40 GHz
Installed memory (RAM): 6.00 GB
System Type: 64-bit Operating System
Hardrive: 640 GB
Current GPU: ATI Radeon HD4850
Have you opened up your case and really looked to see if it is? It is likely that HP new that the card you are using now required it and made the mods back then or you would have been having a lot problems plus HP didn't want to be on the hook.