Graphics Processor GPU Name Barts GPU Variant Barts PRO (215-0798006) Architecture TeraScale 2 Foundry TSMC Process Size 40 nm Transistors 1,700 million Density 6.7M / mm² Die Size 255 mm² Chip Package HFCBGA-1737 Graphics Card Release Date Oct 21st, 2010 Apr 1st, 2011 Generation Northern Islands (HD 6800) Predecessor Evergreen Successor Southern Islands Production End-of-life Bus Interface PCIe 2.0 x16 Clock Speeds GPU Clock 775 MHz 790 MHz (+2%) Memory Clock 1000 MHz 4 Gbps effective Memory Memory Size 1024 MB Memory Type GDDR5 Memory Bus 256 bit Bandwidth 128.0 GB/s Render Config Shading Units 960 TMUs 48 ROPs 32 Compute Units 12 L1 Cache 8 KB (per CU) L2 Cache 512 KB Theoretical Performance Pixel Rate 24.80 GPixel/s 25.28 GPixel/s Texture Rate 37.20 GTexel/s 37.92 GTexel/s FP32 (float) 1,488 GFLOPS 1.517 TFLOPS Board Design Slot Width Dual-slot Length 198 mm 260 mm 7.8 inches 10.2 inches TDP 127 W Suggested PSU 300 W Outputs 2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1 2x DVI 1x HDMI 1.3a 1x DisplayPort 1.1 Power Connectors 1x 6-pin Board Number 109-C22301-00B