EVGA 01G-P3-1182-AR GeForce GTX 285 FTW Edition 1GB 512-bit DDR3 PCI Express 2.0 x16 SLI
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102839
or
SAPPHIRE Atomic Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire (GPU at 1000 MHz w/ Vapor-X technology)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130483
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102839
or
SAPPHIRE Atomic Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire (GPU at 1000 MHz w/ Vapor-X technology)
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130483