GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
AMD Radeon HD 7990
350%
350%
AMD Radeon HD 6850
29%
29%
AMD Radeon HD 7990 is approximately 321% faster
Technical Specifications
| Specification | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Graphics ProcessorDifferent | Malta x2 | Barts |
| CoresDifferent | 2048 x2 | 960 |
| TMUsDifferent | 128 x2 | 48 |
| ROPsDifferent | 32 x2 | 32 |
| Memory SizeDifferent | 3 GB x2 | 1024 MB |
| Memory Type | GDDR5 | GDDR5 |
| Bus WidthDifferent | 384 bit x2 | 256 bit |
Graphics Processor
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| GPU NameDifferent | Malta | Barts |
| GPU VariantDifferent | Malta XT(215-0849026) | Barts PRO(215-0798006) |
| ArchitectureDifferent | GCN 1.0 | TeraScale 2 |
| Foundry | TSMC | TSMC |
| Process SizeDifferent | 28 nm | 40 nm |
| TransistorsDifferent | 4,313 million | 1,700 million |
| DensityDifferent | 11.8M / mm² | 6.7M / mm² |
| Die SizeDifferent | 365 mm² | 255 mm² |
| Chip PackageDifferent | N/A | HFCBGA-1737 |
Graphics Card
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Release DateDifferent | Apr 24th, 2013 | Oct 21st, 2010 |
| GenerationDifferent | Southern Islands(HD 7900) | Northern Islands(HD 6800) |
| PredecessorDifferent | Northern Islands | Evergreen |
| SuccessorDifferent | Sea Islands | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 999 USD | 179 USD |
| Bus InterfaceDifferent | PCIe 3.0 x16 | PCIe 2.0 x16 |
| ReviewsDifferent | 37 in our database | 105 in our database |
Clock Speeds
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Base ClockDifferent | 950 MHz | N/A |
| Boost ClockDifferent | 1000 MHz | N/A |
| Memory ClockDifferent | 1500 MHz6 Gbps effective | 1000 MHz4 Gbps effective |
| GPU ClockDifferent | N/A | 775 MHz |
Memory
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Memory SizeDifferent | 3 GB | 1024 MB |
| Memory Type | GDDR5 | GDDR5 |
| Memory BusDifferent | 384 bit | 256 bit |
| BandwidthDifferent | 288.0 GB/s | 128.0 GB/s |
Render Config
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Shading UnitsDifferent | 2048 | 960 |
| TMUsDifferent | 128 | 48 |
| ROPs | 32 | 32 |
| Compute UnitsDifferent | 32 | 12 |
| L1 CacheDifferent | 16 KB (per CU) | 8 KB (per CU) |
| L2 CacheDifferent | 768 KB | 512 KB |
Theoretical Performance
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Pixel RateDifferent | 32.00 GPixel/s | 24.80 GPixel/s |
| Texture RateDifferent | 128.0 GTexel/s | 37.20 GTexel/s |
| FP32 (float)Different | 4.096 TFLOPS | 1,488.0 GFLOPS |
| FP64 (double)Different | 1,024.0 GFLOPS (1:4) | N/A |
Board Design
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| Slot Width | Dual-slot | Dual-slot |
| LengthDifferent | 304 mm12 inches | 198 mm7.8 inches |
| HeightDifferent | 106 mm4.2 inches | N/A |
| WidthDifferent | 38 mm1.5 inches | N/A |
| TDPDifferent | 375 W | 127 W |
| Suggested PSUDifferent | 750 W | 300 W |
| OutputsDifferent | 1x DVI4x mini-DisplayPort 1.2 | 2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1 |
| Power ConnectorsDifferent | 2x 8-pin | 1x 6-pin |
| Board NumberDifferent | 109-C47637-00A_02 | 109-C22301-00B |
Graphics Features
| Feature | AMD Radeon HD 7990 | AMD Radeon HD 6850 |
|---|---|---|
| DirectXDifferent | 12 (11_1) | 11.2 (11_0) |
| OpenGLDifferent | 4.6 | 4.4 |
| OpenCLDifferent | 2.1 (1.2) | 1.2 |
| VulkanDifferent | 1.2.175 | N/A |
| Shader ModelDifferent | 6.5 (5.1) | 5.0 |
Comparison Summary
7
Specifications Compared
8
Feature Categories
49
Detailed Features
More Comparisons with AMD Radeon HD 7990
Compare AMD Radeon HD 7990 with other GPUs of similar performance
AMD Radeon HD 7990 vs Radeon RX 590
Radeon RX 590 Performance115%
Radeon RX 590 is 15% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon R9 FURY
Radeon R9 FURY Performance112%
Radeon R9 FURY is 12% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs GeForce GTX 980
GeForce GTX 980 Performance111%
GeForce GTX 980 is 11% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs GeForce GTX 1650 SUPER
GeForce GTX 1650 SUPER Performance110%
GeForce GTX 1650 SUPER is 10% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon RX 6500 XT
Radeon RX 6500 XT Performance109%
Radeon RX 6500 XT is 9% faster than AMD Radeon HD 7990
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AMD Radeon HD 7990 vs Radeon RX 5500 XT
Radeon RX 5500 XT Performance108%
Radeon RX 5500 XT is 8% faster than AMD Radeon HD 7990
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More Comparisons with AMD Radeon HD 6850
Compare AMD Radeon HD 6850 with other GPUs of similar performance
AMD Radeon HD 6850 vs GeForce GTX 470
GeForce GTX 470 Performance116%
GeForce GTX 470 is 16% faster than AMD Radeon HD 6850
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AMD Radeon HD 6850 vs GeForce GTX 650 Ti
GeForce GTX 650 Ti Performance111%
GeForce GTX 650 Ti is 11% faster than AMD Radeon HD 6850
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AMD Radeon HD 6850 vs Radeon HD 5850
Radeon HD 5850 Performance109%
Radeon HD 5850 is 9% faster than AMD Radeon HD 6850
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AMD Radeon HD 6850 vs GeForce GTX 285
GeForce GTX 285 Performance102%
GeForce GTX 285 is 2% faster than AMD Radeon HD 6850
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AMD Radeon HD 6850 vs Radeon HD 6850
Radeon HD 6850 Performance100%
Radeon HD 6850 is 0% slower than AMD Radeon HD 6850
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AMD Radeon HD 6850 vs GeForce GTX 280
GeForce GTX 280 Performance94%
GeForce GTX 280 is 6% slower than AMD Radeon HD 6850
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