AMD Radeon HD 6450 vs AMD Radeon HD 7850
Graphics Processor
| GPU model | Caicos | Pitcairn |
|---|---|---|
| GPU variant | Caicos PRO | Pitcairn PRO (215-0828062) |
| Architecture | TeraScale 2 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 370 million | 2,800 million |
| Die size | 67 mm² | 212 mm² |
Graphics Card
| Release date | Apr 7th, 2011 | Mar 5th, 2012 |
|---|---|---|
| Generation | Northern Islands | Southern Islands |
| Production | End-of-life | End-of-life |
| Launch price | 55 USD | 249 USD |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x16 |
| Reviews | 14 in our database | 71 in our database |
| Predecessor | Evergreen | Northern Islands |
| Successor | Southern Islands | Sea Islands |
Clocks
| GPU clock | 625 MHz | 860 MHz |
|---|---|---|
| Memory clock | 800 MHz 3.2 Gbps effective | 1200 MHz 4.8 Gbps effective |
Memory Configuration
| Memory size | 512 MB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 25.60 GB/s | 153.6 GB/s |
Render Configuration
| Shading units | 160 | 1024 |
|---|---|---|
| TMUs | 8 | 64 |
| ROPs | 4 | 32 |
| Compute units | 2 | 16 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 128 KB | 512 KB |
Performance
| Pixel rate | 2.500 GPixel/s | 27.52 GPixel/s |
|---|---|---|
| Texture rate | 5.000 GTexel/s | 55.04 GTexel/s |
| FP32 (float) performance | 200.0 GFLOPS | 1.761 TFLOPS |
| FP64 (double) performance | — | 110.1 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Single-slot | Dual-slot |
|---|---|---|
| Length | 168 mm 6.6 inches | 210 mm 8.3 inches |
| TDP | 18 W | 130 W |
| Suggested PSU | 200 W | 300 W |
| Outputs | 1x DVI1x HDMI1x VGA | 1x DVI1x HDMI2x mini-DisplayPort |
| Power connectors | None | 1x 6-pin |
| Board number | C264 | C401-47 |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 5.1 |
