I agree, but giving options incase the OP prefers nvidia for some reason. Sapphire has some of the best support when it comes to ati gpu's as well.^ I'd take the Sapphire 4850, considering it's ~$25 cheaper after rebates... :/
Just be aware that after market graphics cards have minumum power requirements. Not only total power needed but the amps on the 12v rail for the card to run correctly.
A 300w E-Machines power supply will not run these after market cards. If you buy a new card, you will have to invest in a new power supply also.
Take your pick, all are rougly equal in real world performance:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102824
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131162
http://www.newegg.com/Product/Product.aspx?Item=N82E16814134094
A gts250/9800gtx+ outperforms a 4850 slightly. A 4850 is same as a 9800gtx.
But in all honestly, an awesome video card isn't gonna help you game on a socket 478 setup. The CPU is WAY to much of a bottleneck. I did an experiment with a pentium 4, on a socket 775 setup, the P4 had hyper threading enabled, 2mb cache, and was overclocked to 4.5 ghz (yes 4.5ghz) and it was STILL a HUGE bottleneck playing call of duty world at war. I was also gaming at 1920x1080, higher resolution puts less stress on the CPU and more on the GPU. I could only get like 20-30 FPS. Popped back in my E7200 at 3.8ghz and bam back to 90+ FPS.
65nm VS 55nm makes no difference in performance, only heat/efficiency and maybe overclockability.
A 9800gtx has a stock core clock of 675mhz, a gtx+/gts250 has 738mhz.
Well, folding will be a complete nil factor when the GPU3 client comes out as it uses openCL, and physx isnt really supported on alot of games. Main reason i suggest the 4850 is the fact it is $20 less once you factor in rebates.
So if they are pretty even, why not suggest the Nvidia card? If he ever gets into folding, or any game that uses PhysX there's huge advantages to the gts 250. There is no advantage of the 4850 over the gts250 at all, so why not get the card that has the ''possible'' advantage?
OpenCL will be as good as Cuda? Not sure about that.
Yes, a lot of games, but once again my statement still stands.
Also, I never trust mail in rebates. EVGA is the only one I ever got back, and that took like 3 months IIRC for $15...big whoop.
A gts250/9800gtx+ outperforms a 4850 slightly. A 4850 is same as a 9800gtx.
But in all honestly, an awesome video card isn't gonna help you game on a socket 478 setup. The CPU is WAY to much of a bottleneck. I did an experiment with a pentium 4, on a socket 775 setup, the P4 had hyper threading enabled, 2mb cache, and was overclocked to 4.5 ghz (yes 4.5ghz) and it was STILL a HUGE bottleneck playing call of duty world at war. I was also gaming at 1920x1080, higher resolution puts less stress on the CPU and more on the GPU. I could only get like 20-30 FPS. Popped back in my E7200 at 3.8ghz and bam back to 90+ FPS.
Yeah, there's no way you're getting much of an improvement with a GPU upgrade on that CPU. You see, as 87dtna showed before: Upgrading to a Core2 Duo will help a lot more than upgrading to a $100 video card on a celeron single-core. Here's what you should do: Get a cheap $50 LGA775 mobo, put a cheap Pentium or Celeron Dual-core in it, and see if your rig is fast enough. Most likely, once you upgrade those components, your rig will be faster on your Geforce 6600 than it would have been with your celeron single-core and a GTS250. One thing to always remember: your video card is by no means the only component that matters in gaming.I would get the gts250, when overclocked IMO it will outperform the 4850 overclocked.
Overclocking the celeron won't do anything. Like I said, one of the best Pentium 4's at 4.5ghz with hyper threading wasn't strong enough to play COD world at war. Your celeron is what, 1ghz? And no hyper threading...it doesn't stand a chance.
I agree, but giving options incase the OP prefers nvidia for some reason. Sapphire has some of the best support when it comes to ati gpu's as well.
Yup, here are a few cheaper options for a psu:
http://www.svc.com/ocz600gxssli-b.html
http://www.directron.com/s61epsb.html <--well worth the $50, one of the best power supplies you can get at the 600W mark.
http://www.directron.com/ocz600mxspb.html
http://www.directron.com/reocz500sxsb.html