AMD Radeon HD 6990 vs NVIDIA GeForce GT 420 OEM
Graphics Processor
| GPU model | Antilles | GF108 |
|---|---|---|
| GPU variant | Antilles XT (215-0807027) | GF108-200-A1 |
| Architecture | TeraScale 3 | Fermi |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 40 nm |
| Number of transistors | 2,640 million | 585 million |
| Die size | 389 mm² | 116 mm² |
Graphics Card
| Release date | Mar 8th, 2011 | Sep 3rd, 2010 |
|---|---|---|
| Generation | Northern Islands | GeForce 400 |
| Production | End-of-life | End-of-life |
| Launch price | 699 USD | — |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 47 in our database | — |
| Predecessor | Evergreen | GeForce 200 |
| Successor | Southern Islands | GeForce 500 |
Clocks
| GPU clock | 830 MHz | 700 MHz |
|---|---|---|
| Memory clock | 1250 MHz 5 Gbps effective | 900 MHz 1800 Mbps effective |
| Shader clock | — | 1400 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | GDDR5 | DDR3 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 160.0 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 1536 | 48 |
|---|---|---|
| TMUs | 96 | 4 |
| ROPs | 32 | 4 |
| Compute units | 24 | — |
| Cache L1 | 8 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 512 KB | 256 KB |
| SM count | — | 1 |
Performance
| Pixel rate | 26.56 GPixel/s | 1.400 GPixel/s |
|---|---|---|
| Texture rate | 79.68 GTexel/s | 2.800 GTexel/s |
| FP32 (float) performance | 2.550 TFLOPS | 134.4 GFLOPS |
| FP64 (double) performance | 637.4 GFLOPS (1:4) | 11.20 GFLOPS (1:12) |
Dimensions & Outputs
| Slot width | Dual-slot | Single-slot |
|---|---|---|
| Length | 310 mm 12.2 inches | 145 mm 5.7 inches |
| Width | 115 mm 4.5 inches | — |
| Height | 40 mm 1.6 inches | — |
| TDP | 375 W | 50 W |
| Suggested PSU | 750 W | 250 W |
| Outputs | 1x DVI4x mini-DisplayPort | 1x DVI1x HDMI1x VGA |
| Power connectors | 2x 8-pin | None |
| Board number | C206-47 | P1071 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | — | — |
| Shader model | 5.0 | 5.1 |
| CUDA | — | 2.1 |
