AMD Radeon R9 280 vs AMD Radeon R9 285X
Graphics Processor
GPU model | Tahiti | Tonga |
---|---|---|
GPU variant | Tahiti PRO3 (215-0821330) | Tonga XT |
Architecture | GCN 1.0 | GCN 3.0 |
Foundry | TSMC | TSMC |
Manufacturing process | 28 nm | 28 nm |
Number of transistors | 4,313 million | 5,000 million |
Die size | 352 mm² | 366 mm² |
Graphics Card
Release date | Mar 4th, 2014 | Never Released |
---|---|---|
Generation | Volcanic Islands | Volcanic Islands |
Production | End-of-life | End-of-life |
Launch price | 279 USD | — |
Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
Reviews | 35 in our database | — |
Predecessor | Sea Islands | Sea Islands |
Successor | Pirate Islands | Pirate Islands |
Clocks
Base clock | 827 MHz | — |
---|---|---|
Boost clock | 933 MHz | — |
Memory clock | 1250 MHz 5 Gbps effective | 1375 MHz 5.5 Gbps effective |
GPU clock | — | 1002 MHz |
Memory Configuration
Memory size | 3 GB | 3 GB |
---|---|---|
Memory type | GDDR5 | GDDR5 |
Memory bus width | 384 bit | 384 bit |
Bandwidth | 240.0 GB/s | 264.0 GB/s |
Render Configuration
Shading units | 1792 | 2048 |
---|---|---|
TMUs | 112 | 128 |
ROPs | 32 | 32 |
Compute units | 28 | 32 |
Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
Cache L2 | 768 KB | 768 KB |
Performance
Pixel rate | 29.86 GPixel/s | 32.06 GPixel/s |
---|---|---|
Texture rate | 104.5 GTexel/s | 128.3 GTexel/s |
FP32 (float) performance | 3.344 TFLOPS | 4.104 TFLOPS |
FP64 (double) performance | 836.0 GFLOPS (1:4) | — |
Dimensions & Outputs
Slot width | Dual-slot | Dual-slot |
---|---|---|
Length | 275 mm 10.8 inches | 267 mm 10.5 inches |
Width | 109 mm 4.3 inches | — |
Height | 36 mm 1.4 inches | — |
TDP | 200 W | 200 W |
Suggested PSU | 550 W | 550 W |
Outputs | 1x DVI2x HDMI1x DisplayPort | 2x DVI1x HDMI1x DisplayPort |
Power connectors | 1x 6-pin + 1x 8-pin | 1x 6-pin + 1x 8-pin |
Board number | C386 | C765 |
API Support & Features
DirectX | 12 (11_1) | 12 (12_0) |
---|---|---|
OpenGL | 4.6 | 4.6 |
OpenCL | 1.2 | 2.0 |
Vulkan | 1.2 | 1.2 |
Shader model | 5.1 | 6.3 |