AMD Radeon HD 8490 OEM vs NVIDIA GeForce 7900 GT
Graphics Processor
| GPU model | Caicos | G71 |
|---|---|---|
| GPU variant | Caicos XTX | G71-GT-N-A2 |
| Architecture | TeraScale 2 | Curie |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 90 nm |
| Number of transistors | 370 million | 278 million |
| Die size | 67 mm² | 196 mm² |
Graphics Card
| Release date | Jul 23rd, 2013 | Mar 9th, 2006 |
|---|---|---|
| Generation | Sea Islands | GeForce 7 PCIe |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 1.0 x16 |
| Predecessor | Southern Islands | GeForce 6 PCIe |
| Successor | Volcanic Islands | GeForce 8 |
| Reviews | — | 145 in our database |
Clocks
| GPU clock | 875 MHz | 450 MHz |
|---|---|---|
| Memory clock | 900 MHz 1800 Mbps effective | 660 MHz 1320 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 256 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 14.40 GB/s | 42.24 GB/s |
Render Configuration
| Shading units | 160 | — |
|---|---|---|
| TMUs | 8 | 24 |
| ROPs | 4 | 16 |
| Compute units | 2 | — |
| Cache L1 | 8 KB (per CU) | — |
| Cache L2 | 128 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 3.500 GPixel/s | 7.200 GPixel/s |
|---|---|---|
| Texture rate | 7.000 GTexel/s | 10.80 GTexel/s |
| FP32 (float) performance | 280.0 GFLOPS | — |
| Vertex rate | — | 900.0 MVertices/s |
Dimensions & Outputs
| Slot width | Single-slot | Single-slot |
|---|---|---|
| Length | 168 mm 6.6 inches | — |
| TDP | 35 W | 48 W |
| Suggested PSU | 200 W | 200 W |
| Outputs | 1x DVI1x DisplayPort | 2x DVI1x S-Video |
| Power connectors | None | 1x 6-pin |
| Board number | C369, C553 | P455 |
API Support & Features
| DirectX | 11.2 (11_0) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 4.4 | 2.1 |
| OpenCL | 1.2 | — |
| Vulkan | — | — |
| Shader model | 5.0 | 3.0 |
