Since my 5 year old geforce 6800GT died yesterday I need a new graphics card. But I'm not sure on which one to get. I've seen this ATI 1GB 4850 for £76 http://www.scan.co.uk/Products/1GB-...DDR3-GPU-625MHz-800-Cores-DL-DVI-I-HDMI-D-Sub Geforce GTS 250 512MB for £80 http://www.scan.co.uk/Products/512M...it-2200-MHz-GDDR3-GPU-738-MHz-HDTV-DVI-Retail But would a 1GB 4850 be better than a 512MB GTS250 at the same price? Or would the 1GB GTS 250 be similar or better than the 4850? I'll be using the likes of CS4 and Steam games like HL2 etc a lot too. I've read mix reports that the ati is way hotter but has slighty more features especially for gaming but the gts has physx, CUDA and may be better for the likes of photoshop and flash and sony vegas. I have a 480W PSU and I can only guess that'll be ok enough to support the cards?