AMD Radeon HD 6990 vs NVIDIA GRID K520Q
Graphics Processor
| GPU model | Antilles | GK104 |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | — |
| Architecture | TeraScale 3 | Kepler |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 2,640 million | 3,540 million |
| Die size | 389 mm² | 294 mm² |
Graphics Card
| Release date | Mar 8th, 2011 | Jul 2nd, 2014 |
|---|---|---|
| Generation | Northern Islands | GRID |
| Production | End-of-life | End-of-life |
| Launch price | 699 USD | 3,599 USD |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 47 in our database | — |
| Predecessor | Evergreen | — |
| Successor | Southern Islands | — |
Clocks
| GPU clock | 830 MHz | 745 MHz |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 1250 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 160.0 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 1536 | 1536 |
|---|---|---|
| TMUs | 96 | 128 |
| ROPs | 32 | 32 |
| Compute units | 24 | — |
| Cache L1 | 8 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 512 KB | 512 KB |
| SMX count | — | 8 |
Performance
| Pixel rate | 26.56 GPixel/s | 23.84 GPixel/s |
|---|---|---|
| Texture rate | 79.68 GTexel/s | 95.36 GTexel/s |
| FP32 (float) performance | 2.550 TFLOPS | 2.289 TFLOPS |
| FP64 (double) performance | 637.4 GFLOPS (1:4) | 95.36 GFLOPS (1:24) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 310 mm 12.2 inches | 267 mm 10.5 inches |
| Width | 115 mm 4.5 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 375 W | 225 W |
| Suggested PSU | 750 W | 550 W |
| Outputs | 1x DVI4x mini-DisplayPort | No outputs |
| Power connectors | 2x 8-pin | — |
| Board number | C206-47 | — |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 3.0 |
