EVGA GeForce GTS 450 FTW 1 GB GDDR5 PCI-Express 2.0 Graphics Card 01G-P3-1458-TR GeForce GTS 450 with 920 MHz core clock PCI Express 2.0 1024 MB 128-bit 0.5ns GDDR5 memory 4100 MHz memory clock and 1840 MHz shader clock NVIDIA 2-way SLI ready