ATI Mobility Radeon HD 4850 Mac Edition vs NVIDIA GeForce 920A
Graphics Processor
| GPU model | M98 | GK208B |
|---|---|---|
| Architecture | TeraScale | Kepler 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 55 nm | 28 nm |
| Number of transistors | 956 million | 1,020 million |
| Die size | 256 mm² | 87 mm² |
| GPU variant | — | N16V-GM |
Mobile graphics
| Release date | Aug 28th, 2009 | Mar 13th, 2015 |
|---|---|---|
| Generation | M9x (Mobility HD 4800) | GeForce 900A |
| Production | End-of-life | Active |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Reviews | 2 in our database | — |
| Predecessor | M8x | GeForce 800A |
| Successor | Manhattan | — |
Clocks
| GPU clock | 503 MHz | 954 MHz |
|---|---|---|
| Memory clock | 850 MHz 1700 Mbps effective | 1001 MHz 2 Gbps effective |
Memory Configuration
| Memory size | 512 MB | 2 GB |
|---|---|---|
| Memory type | GDDR3 | DDR3 |
| Memory bus width | 256 bit | 64 bit |
| Bandwidth | 54.40 GB/s | 16.02 GB/s |
Render Configuration
| Shading units | 800 | 384 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 8 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 16 KB (per SMX) |
| Cache L2 | 256 KB | 512 KB |
| SMX count | — | 2 |
Performance
| Pixel rate | 8.048 GPixel/s | 7.632 GPixel/s |
|---|---|---|
| Texture rate | 20.12 GTexel/s | 30.53 GTexel/s |
| FP32 (float) performance | 804.8 GFLOPS | 732.7 GFLOPS |
| FP64 (double) performance | 161.0 GFLOPS (1:5) | 30.53 GFLOPS (1:24) |
Dimensions & Outputs
| TDP | unknown | 33 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | IGP |
API Support & Features
| DirectX | 10.1 (10_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 3.3 | 4.6 |
| OpenCL | 1.1 | 3.0 |
| Vulkan | — | 1.1 |
| Shader model | 4.1 | 5.1 |
| CUDA | — | 3.5 |
