AMD Radeon HD 6770 vs AMD Radeon HD 6990 Full Specs
800 Shaders 850MHz | 3,072 Shaders 830MHz |
1GB GDDR576.8GB/s | 4GB GDDR5320GB/s |
·· 1.36 TFLOPS | ·· 5.1 TFLOPS |
Form Factor PCIe Card | Form Factor PCIe Card |
TDP 108W | TDP 375W |
Power Connectors - 1x 6-Pin | Power Connectors 2x 8-Pin - |
Radeon HD 67701.36 TFLOPSFP32
Radeon HD 69905.1 TFLOPSFP32 (2x 2.55 TFLOPS)Clock Speed ·· | Clock Speed ·· |
Peak OPS 1.36 TFLOPSFP32 | Peak OPS 5.1 TFLOPSFP32 |
FP32 1.36 TFLOPS | FP32 5.1 TFLOPS |
- | FP64 1.27 TFLOPS |
Pixel Rate 13.6 GPixel/s | Pixel Rate 26.6 GPixel/s |
Texture Rate 34 GTexel/s | Texture Rate 79.7 GTexel/s |
Shaders 800 Shaders | Shaders 3,072 Shaders |
TMUs 40 TMUs | TMUs 192 TMUs |
ROPs 16 ROPs | ROPs 64 ROPs |
CUs 10 CUs | CUs 48 CUs |
Boost Clock 850MHz | Boost Clock 830MHz |
L2 Cache 256KB shared | L2 Cache 512KB shared |
1GB GDDR5 | 4GB GDDR5 |
Memory Bus 128-bit | Memory Bus 256-bit |
Memory Speed 4.8GT/s | Memory Speed 5GT/s |
Memory Bandwidth 76.8GB/s | Memory Bandwidth 320GB/s |
ECC No | ECC No |
TDP 108W | TDP 375W |
Multi-Monitor 2 | Multi-Monitor 4 |
1x DisplayPort 1.1 | - |
- | 4x Mini DisplayPort 1.1 |
1x HDMI 1.3 | - |
2x DVI-I Dual-Link | 1x DVI-I Dual-Link |
Decoder Model UVD 2.2 | Decoder Model UVD 3.1 |
Form Factor PCIe Card | Form Factor PCIe Card |
PCIe 2-Slots | PCIe 2-Slots |
Height 111 mm (4.37")Width 198 mm (7.79")Depth 36 mm (1.42") | Height 115 mm (4.53")Width 310 mm (12.2")Depth 40 mm (1.57") |
Cooling Blower 1x Fan | Cooling Blower 1x Fan |
Power Connectors 1x 6-Pin | Power Connectors 2x 8-Pin |
Manufacturer | Manufacturer |
Chip Designer | Chip Designer |
Architecture | Architecture |
Family | Family |
Branding  | Branding  |
Codename Juniper | Codename Cayman |
Chip Variant Juniper Pro | Chip Variant Cayman CE |
Market Segment Desktop | Market Segment Desktop |
Release Date Apr 19, 2011 | Release Date Mar 8, 2011 |
Foundry TSMC | Foundry TSMC |
Fabrication Node 40nm | Fabrication Node 40nm |
Die Size 170mm² | Die Size 389mm² |
Transistor Count 1 Billion | Transistor Count 2.6 Billion |
Transistor Density 6.12 MTr/mm² | Transistor Density 6.79 MTr/mm² |
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