GPU Comparison
Side-by-side comparison of specifications and performance
Performance Comparison
NVIDIA GeForce GTX 660
52%
52%
AMD Radeon HD 7990
220%
220%
AMD Radeon HD 7990 is approximately 168% faster
Technical Specifications
| Specification | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Graphics ProcessorDifferent | GK106 | Malta x2 |
| CoresDifferent | 960 | 2048 x2 |
| TMUsDifferent | 80 | 128 x2 |
| ROPsDifferent | 24 | 32 x2 |
| Memory SizeDifferent | 2 GB | 3 GB x2 |
| Memory Type | GDDR5 | GDDR5 |
| Bus WidthDifferent | 192 bit | 384 bit x2 |
Graphics Processor
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| GPU NameDifferent | GK106 | Malta |
| GPU VariantDifferent | GK106-400-A1 | Malta XT(215-0849026) |
| ArchitectureDifferent | Kepler | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Process Size | 28 nm | 28 nm |
| TransistorsDifferent | 2,540 million | 4,313 million |
| DensityDifferent | 11.5M / mm² | 11.8M / mm² |
| Die SizeDifferent | 221 mm² | 365 mm² |
| Chip PackageDifferent | BGA-1425 | N/A |
Graphics Card
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Release DateDifferent | Sep 6th, 2012 | Apr 24th, 2013 |
| GenerationDifferent | GeForce 600 | Southern Islands(HD 7900) |
| PredecessorDifferent | GeForce 500 | Northern Islands |
| SuccessorDifferent | GeForce 700 | Sea Islands |
| Production | End-of-life | End-of-life |
| Launch PriceDifferent | 229 USD | 999 USD |
| Bus Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| ReviewsDifferent | 77 in our database | 37 in our database |
Clock Speeds
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Base ClockDifferent | 980 MHz | 950 MHz |
| Boost ClockDifferent | 1032 MHz | 1000 MHz |
| Memory ClockDifferent | 1502 MHz6 Gbps effective | 1500 MHz6 Gbps effective |
Memory
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Memory SizeDifferent | 2 GB | 3 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory BusDifferent | 192 bit | 384 bit |
| BandwidthDifferent | 144.2 GB/s | 288.0 GB/s |
Render Config
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Shading UnitsDifferent | 960 | 2048 |
| TMUsDifferent | 80 | 128 |
| ROPsDifferent | 24 | 32 |
| SMX CountDifferent | 5 | N/A |
| L1 CacheDifferent | 16 KB (per SMX) | 16 KB (per CU) |
| L2 CacheDifferent | 384 KB | 768 KB |
| Compute UnitsDifferent | N/A | 32 |
Theoretical Performance
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Pixel RateDifferent | 20.64 GPixel/s | 32.00 GPixel/s |
| Texture RateDifferent | 82.56 GTexel/s | 128.0 GTexel/s |
| FP32 (float)Different | 1.981 TFLOPS | 4.096 TFLOPS |
| FP64 (double)Different | 82.56 GFLOPS (1:24) | 1,024.0 GFLOPS (1:4) |
Board Design
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| Slot Width | Dual-slot | Dual-slot |
| LengthDifferent | 241 mm9.5 inches | 304 mm12 inches |
| TDPDifferent | 140 W | 375 W |
| Suggested PSUDifferent | 300 W | 750 W |
| OutputsDifferent | 2x DVI1x HDMI 1.4a1x DisplayPort 1.2 | 1x DVI4x mini-DisplayPort 1.2 |
| Power ConnectorsDifferent | 1x 6-pin | 2x 8-pin |
| Board NumberDifferent | P2030 SKU 0 | 109-C47637-00A_02 |
| HeightDifferent | N/A | 106 mm4.2 inches |
| WidthDifferent | N/A | 38 mm1.5 inches |
Graphics Features
| Feature | NVIDIA GeForce GTX 660 | AMD Radeon HD 7990 |
|---|---|---|
| DirectXDifferent | 12 (11_0) | 12 (11_1) |
| OpenGL | 4.6 | 4.6 |
| OpenCLDifferent | 3.0 | 2.1 (1.2) |
| Vulkan | 1.2.175 | 1.2.175 |
| CUDADifferent | 3.0 | N/A |
| Shader Model | 6.5 (5.1) | 6.5 (5.1) |
Comparison Summary
7
Specifications Compared
8
Feature Categories
50
Detailed Features
More Comparisons with NVIDIA GeForce GTX 660
Compare NVIDIA GeForce GTX 660 with other GPUs of similar performance
NVIDIA GeForce GTX 660 vs Radeon HD 5970
Radeon HD 5970 Performance117%
Radeon HD 5970 is 17% faster than NVIDIA GeForce GTX 660
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NVIDIA GeForce GTX 660 vs GeForce GTX 1630
GeForce GTX 1630 Performance117%
GeForce GTX 1630 is 17% faster than NVIDIA GeForce GTX 660
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NVIDIA GeForce GTX 660 vs GeForce GTX 1050
GeForce GTX 1050 Performance115%
GeForce GTX 1050 is 15% faster than NVIDIA GeForce GTX 660
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NVIDIA GeForce GTX 660 vs GeForce GTX 760
GeForce GTX 760 Performance114%
GeForce GTX 760 is 14% faster than NVIDIA GeForce GTX 660
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NVIDIA GeForce GTX 660 vs GeForce GTX 580
GeForce GTX 580 Performance114%
GeForce GTX 580 is 14% faster than NVIDIA GeForce GTX 660
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NVIDIA GeForce GTX 660 vs GeForce GTX 660 Ti
GeForce GTX 660 Ti Performance113%
GeForce GTX 660 Ti is 13% faster than NVIDIA GeForce GTX 660
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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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