AMD Radeon HD 6490 vs AMD Radeon HD 6990 Full Specs
320 Shaders 550MHz | 3,072 Shaders 830MHz |
1GB DDR216GB/s | 4GB GDDR5320GB/s |
·· 352 GFLOPS | ·· 5.1 TFLOPS |
Form Factor PCIe Card | Form Factor PCIe Card |
TDP 55W | TDP 375W |
Power Connectors - | Power Connectors 2x 8-Pin |
Clock Speed ·· | Clock Speed ·· |
Peak OPS 352 GFLOPSFP32 | Peak OPS 5.1 TFLOPSFP32 |
FP32 352 GFLOPS | FP32 5.1 TFLOPS |
- | FP64 1.27 TFLOPS |
Pixel Rate 4.4 GPixel/s | Pixel Rate 26.6 GPixel/s |
Texture Rate 8.8 GTexel/s | Texture Rate 79.7 GTexel/s |
Shaders 320 Shaders | Shaders 3,072 Shaders |
TMUs 16 TMUs | TMUs 192 TMUs |
ROPs 8 ROPs | ROPs 64 ROPs |
CUs 4 CUs | CUs 48 CUs |
Boost Clock 550MHz | Boost Clock 830MHz |
L2 Cache 256KB shared | L2 Cache 512KB shared |
1GB DDR2 | 4GB GDDR5 |
Memory Bus 128-bit | Memory Bus 256-bit |
Memory Speed 1GT/s | Memory Speed 5GT/s |
Memory Bandwidth 16GB/s | Memory Bandwidth 320GB/s |
ECC No | ECC No |
TDP 55W | TDP 375W |
Multi-Monitor 2 | Multi-Monitor 4 |
- 1x HDMI 1.3 1x DVI-I Dual-Link 1x VGA | 4x Mini DisplayPort 1.1 - 1x DVI-I Dual-Link - |
Decoder Model UVD 3.0 | Decoder Model UVD 3.1 |
Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) | Codec MPEG-1 MPEG-2 MPEG-4 VC-1 AVC (H.264) |
Form Factor PCIe Card | Form Factor PCIe Card |
PCIe 1-Slots | PCIe 2-Slots |
- | Height 115 mm (4.53")Width 310 mm (12.2")Depth 40 mm (1.57") |
Cooling Open-Air 1x Fan | Cooling Blower 1x Fan |
Power Connectors - | Power Connectors 2x 8-Pin |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename Redwood | Codename Cayman |
Chip Variant Redwood LE | Chip Variant Cayman CE |
Market Segment Desktop | Market Segment Desktop |
Release Date Jul 4, 2011 | Release Date Mar 8, 2011 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 40nm | Fabrication Node 40nm |
Die Size 104mm² | Die Size 389mm² |
Transistor Count 627 Million | Transistor Count 2.6 Billion |
Transistor Density 6.03 MTr/mm² | Transistor Density 6.79 MTr/mm² |