GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
AMD Radeon HD 7770 GHz Edition
104%
104%
AMD Radeon HD 6990
257%
257%
AMD Radeon HD 6990 is approximately 153% faster
Technical Specifications
| Specification | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Graphics ProcessorDifferent | Cape Verde | Antilles x2 |
| CoresDifferent | 640 | 1536 x2 |
| TMUsDifferent | 40 | 96 x2 |
| ROPsDifferent | 16 | 32 x2 |
| Memory SizeDifferent | 1024 MB | 2 GB x2 |
| Memory Type | GDDR5 | GDDR5 |
| Bus WidthDifferent | 128 bit | 256 bit x2 |
Graphics Processor
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| GPU NameDifferent | Cape Verde | Antilles |
| GPU VariantDifferent | Cape Verde XT(215-0825117) | Antilles XT(215-0807027) |
| ArchitectureDifferent | GCN 1.0 | TeraScale 3 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 1,500 million | 2,640 million |
| DensityDifferent | 12.2M / mm² | 6.8M / mm² |
| Die SizeDifferent | 123 mm² | 389 mm² |
| Chip PackageDifferent | FCBGA-962 | N/A |
Graphics Card
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Release DateDifferent | Feb 15th, 2012 | Mar 8th, 2011 |
| GenerationDifferent | Southern Islands(HD 7700) | Northern Islands(HD 6900) |
| PredecessorDifferent | Northern Islands | Evergreen |
| SuccessorDifferent | Sea Islands | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 159 USD | 699 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 97 in our database | 47 in our database |
Clock Speeds
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| GPU ClockDifferent | 1000 MHz | 830 MHz |
| Memory ClockDifferent | 1125 MHz4.5 Gbps effective | 1250 MHz5 Gbps effective |
Memory
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Memory SizeDifferent | 1024 MB | 2 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory BusDifferent | 128 bit | 256 bit |
| BandwidthDifferent | 72.00 GB/s | 160.0 GB/s |
Render Config
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Shading UnitsDifferent | 640 | 1536 |
| TMUsDifferent | 40 | 96 |
| ROPsDifferent | 16 | 32 |
| Compute UnitsDifferent | 10 | 24 |
| L1 CacheDifferent | 16 KB (per CU) | 8 KB (per CU) |
| L2 CacheDifferent | 256 KB | 512 KB |
Theoretical Performance
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Pixel RateDifferent | 16.00 GPixel/s | 26.56 GPixel/s |
| Texture RateDifferent | 40.00 GTexel/s | 79.68 GTexel/s |
| FP32 (float)Different | 1,280.0 GFLOPS | 2.550 TFLOPS |
| FP64 (double)Different | 80.00 GFLOPS (1:16) | 637.4 GFLOPS (1:4) |
Board Design
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| Slot Width | Dual-slot | Dual-slot |
| LengthDifferent | 210 mm8.3 inches | 310 mm12.2 inches |
| TDPDifferent | 80 W | 375 W |
| Suggested PSUDifferent | 250 W | 750 W |
| OutputsDifferent | 1x DVI1x HDMI 1.4a2x mini-DisplayPort 1.2 | 1x DVI4x mini-DisplayPort 1.2 |
| Power ConnectorsDifferent | 1x 6-pin | 2x 8-pin |
| Board NumberDifferent | 109-C44157-00C, C468 | 109-C20647-00 |
| HeightDifferent | N/A | 115 mm4.5 inches |
| WidthDifferent | N/A | 40 mm1.6 inches |
Graphics Features
| Feature | AMD Radeon HD 7770 GHz Edition | AMD Radeon HD 6990 |
|---|---|---|
| DirectXDifferent | 12 (11_1) | 11.2 (11_0) |
| OpenGLDifferent | 4.6 | 4.4 |
| OpenCLDifferent | 2.1 (1.2) | 1.2 |
| VulkanDifferent | 1.2.170 | N/A |
| Shader ModelDifferent | 6.5 (5.1) | 5.0 |
Comparison Summary
7
Specifications Compared
8
Feature Categories
47
Detailed Features
More Comparisons with AMD Radeon HD 7770 GHz Edition
Compare AMD Radeon HD 7770 GHz Edition with other GPUs of similar performance
AMD Radeon HD 7770 GHz Edition vs GeForce GTX 650 Ti
GeForce GTX 650 Ti Performance119%
GeForce GTX 650 Ti is 19% faster than AMD Radeon HD 7770 GHz Edition
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AMD Radeon HD 7770 GHz Edition vs Radeon HD 5850
Radeon HD 5850 Performance117%
Radeon HD 5850 is 17% faster than AMD Radeon HD 7770 GHz Edition
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AMD Radeon HD 7770 GHz Edition vs GeForce GTX 285
GeForce GTX 285 Performance109%
GeForce GTX 285 is 9% faster than AMD Radeon HD 7770 GHz Edition
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AMD Radeon HD 7770 GHz Edition vs Radeon HD 6850
Radeon HD 6850 Performance107%
Radeon HD 6850 is 7% faster than AMD Radeon HD 7770 GHz Edition
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AMD Radeon HD 7770 GHz Edition vs GeForce GTX 280
GeForce GTX 280 Performance100%
GeForce GTX 280 is 0% slower than AMD Radeon HD 7770 GHz Edition
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AMD Radeon HD 7770 GHz Edition vs Radeon HD 7770 GHz Edition
Radeon HD 7770 GHz Edition Performance100%
Radeon HD 7770 GHz Edition is 0% slower than AMD Radeon HD 7770 GHz Edition
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More Comparisons with AMD Radeon HD 6990
Compare AMD Radeon HD 6990 with other GPUs of similar performance
AMD Radeon HD 6990 vs GeForce GTX 1650
GeForce GTX 1650 Performance119%
GeForce GTX 1650 is 19% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon RX 6400
Radeon RX 6400 Performance117%
Radeon RX 6400 is 17% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Arc A380
Arc A380 Performance115%
Arc A380 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 780
GeForce GTX 780 Performance115%
GeForce GTX 780 is 15% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs Radeon HD 7970 GHz Edition
Radeon HD 7970 GHz Edition Performance104%
Radeon HD 7970 GHz Edition is 4% faster than AMD Radeon HD 6990
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AMD Radeon HD 6990 vs GeForce GTX 590
GeForce GTX 590 Performance104%
GeForce GTX 590 is 4% faster than AMD Radeon HD 6990
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