Radeon HD 7850
The reference Radeon HD 7850 card looks identical to the older Radeon HD 7870 model with one exception: this card has one 6-pin auxiliary power connector instead of two. This is a consequence of the lower TDP of 135W.
Radeon HD 7850 Specifications
| Name | Radeon HD 7850 |
| Core | Pitcairn |
| Process technology (µm) | 0.028 |
| Core frequency | 860 |
| Memory frequency (DDR) | 2400 (4800) |
| Bus and memory type | GDDR5 256-bit |
| Bandwidth (Gb/s) | 153.6 |
| Unified shader blocks | 1024 |
| Frequency of unified shader units | 860 |
| TMU per conveyor | 64 |
| ROP | 32 |
| Shader Model | 5.0 |
| Fill Rate (Mpix/s) | 27520 |
| Fill Rate (Mtex/s) | 55040 |
| DirectX | 11.0 |
| Memory | 2048 |
| Interface | PCI-E 3.0 x16 |
The Radeon HD 7850 uses a stripped down version of the Pitcairn GPU, removing four compute units for a total of 1024 stream processors and 64 texture units. The core frequency is 860 MHz.