AMD Radeon HD 6990 vs AMD Radeon HD 7790
Graphics Processor
| GPU model | Antilles | Bonaire |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | Bonaire XT (215-0839039) |
| Architecture | TeraScale 3 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 2,640 million | 2,080 million |
| Die size | 389 mm² | 160 mm² |
Graphics Card
| Release date | Mar 8th, 2011 | Mar 22nd, 2013 |
|---|---|---|
| Generation | Northern Islands | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch price | 699 USD | 149 USD |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 47 in our database | 93 in our database |
| Predecessor | Evergreen | Northern Islands |
| Successor | Southern Islands | Sea Islands |
Clocks
| GPU clock | 830 MHz | 1000 MHz |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1500 MHz 6 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 160.0 GB/s | 96.00 GB/s |
Render Configuration
| Shading units | 1536 | 896 |
|---|---|---|
| TMUs | 96 | 56 |
| ROPs | 32 | 16 |
| Compute units | 24 | 14 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 256 KB |
Performance
| Pixel rate | 26.56 GPixel/s | 16.00 GPixel/s |
|---|---|---|
| Texture rate | 79.68 GTexel/s | 56.00 GTexel/s |
| FP32 (float) performance | 2.550 TFLOPS | 1.792 TFLOPS |
| FP64 (double) performance | 637.4 GFLOPS (1:4) | 112.0 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 310 mm 12.2 inches | 183 mm 7.2 inches |
| Width | 115 mm 4.5 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 375 W | 85 W |
| Suggested PSU | 750 W | 250 W |
| Outputs | 1x DVI4x mini-DisplayPort | 1x DVI1x HDMI2x mini-DisplayPort |
| Power connectors | 2x 8-pin | 1x 6-pin |
| Board number | C206-47 | C582 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 6.3 |
