SAPPHIRE 100154L Radeon X1800XT SAPPHIRE 100154SR Radeon X1800XT the numbers on the cards clock speed, mem etc are the same. it has some diffrences in the text descriptions at NewEgg.com SAPPHIRE 100154SR Radeon X1800XT :--- sys reqs: PCI Express based PC is required with one X16 lane graphics slot available on the motherboard (PCI-E version) Connection to the system power supply is required. The power supply should have a specialized 12V graphics card power connector 350-Watt power supply or greater recommended Intel Pentium 4/III, AMD Athlon 64/K7/ Athlon XP 256 MB system memory or more for better performance Installation software requires CD-ROM drive DVD playback requires DVD drive Feats: Hydravision 3 HDTV Compatible (YPbPr) SuperAA Shader Model 3.0 Single slot cooling solution FullStream (Video-deblocking) - Real, divX, WM9 the other card SAPPHIRE 100154L Radeon X1800XT sys reqs: PCI Express® based PC is required with one x16 lane graphics slot available on the motherboard. Connection to the system power supply is required (Adapter Included). 450-Watt power supply or greater recommended (assumes fully loaded system) 512MB of System Memory Installation software requires CD-ROM drive DVD playback requires DVD drive and decoder software (not included Feats: Ring Bus Memory Controller Ultra-Threaded Shader Engine Avivo™ Video and Display Platform CrossFire™ Ready dual-link DVI Shader Model 3.0 SuperAA HDTV Compatible (YPbPr any help here is apreceated, i plan to order tonight or tomorrow. i am trying to read off a very bad screen hehe as my current video card is mostl shot.