ATI Radeon HD 3870 AGP vs NVIDIA GeForce 7800 GTX 512
Graphics Processor
| GPU model | RV670 | G70 |
|---|---|---|
| GPU variant | RV670 XT (215-0708005) | GF-7800-U-A2 |
| Architecture | TeraScale | Curie |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 110 nm |
| Number of transistors | 666 million | 302 million |
| Die size | 192 mm² | 333 mm² |
Graphics Card
| Release date | Never Released | Nov 14th, 2005 |
|---|---|---|
| Generation | Radeon R600 | GeForce 7 PCIe |
| Production | End-of-life | End-of-life |
| Interface | AGP 8x | PCIe 1.0 x16 |
| Reviews | 80 in our database | 206 in our database |
| Predecessor | Radeon R500 PCIe | GeForce 6 PCIe |
| Successor | Radeon R700 | GeForce 8 |
| Launch price | — | 649 USD |
Clocks
| GPU clock | 777 MHz | 500 MHz |
|---|---|---|
| Memory clock | 1126 MHz 2.3 Gbps effective | 800 MHz 1600 Mbps effective |
Memory Configuration
| Memory size | 512 MB | 512 MB |
|---|---|---|
| Memory type | GDDR4 | GDDR3 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 72.06 GB/s | 51.20 GB/s |
Render Configuration
| Shading units | 320 | — |
|---|---|---|
| TMUs | 16 | 24 |
| ROPs | 16 | 16 |
| Compute units | 4 | — |
| Cache L2 | 256 KB | — |
| Pixel shaders | — | 24 |
| Vertex shaders | — | 8 |
Performance
| Pixel rate | 12.43 GPixel/s | 8.000 GPixel/s |
|---|---|---|
| Texture rate | 12.43 GTexel/s | 12.00 GTexel/s |
| FP32 (float) performance | 497.3 GFLOPS | — |
| FP64 (double) performance | 99.46 GFLOPS (1:5) | — |
| Vertex rate | — | 1.000 GVertices/s |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 241 mm 9.5 inches | 228 mm 9 inches |
| TDP | 106 W | 108 W |
| Suggested PSU | 300 W | 300 W |
| Outputs | 2x DVI1x S-Video | 2x DVI1x S-Video |
| Power connectors | 1x 8-pin | — |
| Board number | — | P348 |
| Width | — | 111 mm 4.4 inches |
| Height | — | 38 mm 1.5 inches |
API Support & Features
| DirectX | 10.1 (10_1) | 9.0c (9_3) |
|---|---|---|
| OpenGL | 3.3 (full) 4.0 (partial) | 2.1 |
| OpenCL | — | — |
| Vulkan | — | — |
| Shader model | 4.1 | 3.0 |
