ATI Mobility Radeon HD 4830 vs ATI Mobility Radeon HD 4850 Mac Edition
Graphics Processor
| GPU model | M97 | M98 |
|---|---|---|
| Architecture | TeraScale | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 55 nm |
| Number of transistors | 826 million | 956 million |
| Die size | 137 mm² | 256 mm² |
Mobile graphics
| Release date | Mar 3rd, 2009 | Aug 28th, 2009 |
|---|---|---|
| Generation | M9x (Mobility HD 4800) | M9x (Mobility HD 4800) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 2.0 x16 |
| Reviews | 2 in our database | 2 in our database |
| Predecessor | M8x | M8x |
| Successor | Manhattan | Manhattan |
Clocks
| GPU clock | 550 MHz | 503 MHz |
|---|---|---|
| Memory clock | 700 MHz 2.8 Gbps effective | 850 MHz 1700 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 512 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR3 |
| Memory bus width | 128 bit | 256 bit |
| Bandwidth | 44.80 GB/s | 54.40 GB/s |
Render Configuration
| Shading units | 640 | 800 |
|---|---|---|
| TMUs | 32 | 40 |
| ROPs | 16 | 16 |
| Compute units | 8 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 128 KB | 256 KB |
Performance
| Pixel rate | 8.800 GPixel/s | 8.048 GPixel/s |
|---|---|---|
| Texture rate | 17.60 GTexel/s | 20.12 GTexel/s |
| FP32 (float) performance | 704.0 GFLOPS | 804.8 GFLOPS |
| FP64 (double) performance | 140.8 GFLOPS (1:5) | 161.0 GFLOPS (1:5) |
Dimensions & Outputs
| TDP | unknown | unknown |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 10.1 (10_1) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 3.3 | 3.3 |
| OpenCL | 1.1 | 1.1 |
| Vulkan | — | — |
| Shader model | 4.1 | 4.1 |
