ATI Mobility Radeon HD 4870 vs NVIDIA GeForce GTX 275
Graphics Processor
| GPU model | M98 | GT200B |
|---|---|---|
| GPU variant | M98 XT (216-0732023) | G200-105-B3 |
| Architecture | TeraScale | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 55 nm |
| Number of transistors | 956 million | 1,400 million |
| Die size | 256 mm² | 470 mm² |
Mobile graphics
| Release date | Jan 9th, 2009 | — |
|---|---|---|
| Generation | M9x (Mobility HD 4800) | — |
| Production | End-of-life | — |
| Interface | PCIe 2.0 x16 | — |
| Reviews | 2 in our database | — |
| Predecessor | M8x | — |
| Successor | Manhattan | — |
Clocks
| GPU clock | 550 MHz | 633 MHz |
|---|---|---|
| Memory clock | 888 MHz 1776 Mbps effective | 1134 MHz 2.3 Gbps effective |
| Shader clock | — | 1404 MHz |
Memory Configuration
| Memory size | 512 MB | 896 MB |
|---|---|---|
| Memory type | GDDR3 | GDDR3 |
| Memory bus width | 256 bit | 448 bit |
| Bandwidth | 56.83 GB/s | 127.0 GB/s |
Render Configuration
| Shading units | 800 | 240 |
|---|---|---|
| TMUs | 40 | 80 |
| ROPs | 16 | 28 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | — |
| Cache L2 | 256 KB | 224 KB |
| SM count | — | 30 |
Performance
| Pixel rate | 8.800 GPixel/s | 17.72 GPixel/s |
|---|---|---|
| Texture rate | 22.00 GTexel/s | 50.64 GTexel/s |
| FP32 (float) performance | 880.0 GFLOPS | 673.9 GFLOPS |
| FP64 (double) performance | 176.0 GFLOPS (1:5) | 84.24 GFLOPS (1:8) |
Dimensions & Outputs
| TDP | unknown | 219 W |
|---|---|---|
| Outputs | No outputs | 2x DVI |
| Slot width | — | Dual-slot |
| Length | — | 267 mm 10.5 inches |
| Suggested PSU | — | 550 W |
| Power connectors | — | 2x 6-pin |
| Board number | — | P897 |
API Support & Features
| DirectX | 10.1 (10_1) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.0 |
| CUDA | — | 1.3 |
Other Features
Graphics Card
| Release date | — | Jan 15th, 2009 |
|---|---|---|
| Generation | — | GeForce 200 |
| Production | — | End-of-life |
| Launch price | — | 249 USD |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 61 in our database |
| Predecessor | — | GeForce 9 |
| Successor | — | GeForce 400 |
