AMD Radeon HD 8770 OEM vs ATI Radeon HD 4770
Graphics Processor
| GPU model | Bonaire | RV740 |
|---|---|---|
| GPU variant | Bonaire XT (215-0839039) | RV740 XT (215-0727019) |
| Architecture | GCN 2.0 | TeraScale |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 2,080 million | 826 million |
| Die size | 160 mm² | 137 mm² |
Graphics Card
| Release date | Sep 2nd, 2013 | Apr 28th, 2009 |
|---|---|---|
| Generation | Sea Islands | Radeon R700 |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 2.0 x16 |
| Predecessor | Southern Islands | Radeon R600 |
| Successor | Volcanic Islands | Evergreen |
| Launch price | — | 109 USD |
| Reviews | — | 82 in our database |
Clocks
| GPU clock | 1050 MHz | 750 MHz |
|---|---|---|
| Memory clock | 1500 MHz 6 Gbps effective | 800 MHz 3.2 Gbps effective |
Memory Configuration
| Memory size | 1024 MB | 512 MB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 96.00 GB/s | 51.20 GB/s |
Render Configuration
| Shading units | 896 | 640 |
|---|---|---|
| TMUs | 56 | 32 |
| ROPs | 16 | 16 |
| Compute units | 14 | 8 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 128 KB |
Performance
| Pixel rate | 16.80 GPixel/s | 12.00 GPixel/s |
|---|---|---|
| Texture rate | 58.80 GTexel/s | 24.00 GTexel/s |
| FP32 (float) performance | 1.882 TFLOPS | 960.0 GFLOPS |
| FP64 (double) performance | 117.6 GFLOPS (1:16) | 192.0 GFLOPS (1:5) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 183 mm 7.2 inches | 203 mm 8 inches |
| TDP | 85 W | 80 W |
| Suggested PSU | 250 W | 250 W |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | 2x DVI1x S-Video |
| Power connectors | 1x 6-pin | 1x 6-pin |
| Board number | — | B743 |
API Support & Features
| DirectX | 12 (12_0) | 10.1 (10_1) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 2.0 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 6.3 | 4.1 |
