AMD Radeon HD 7970 vs AMD Radeon HD 8990 OEM
Graphics Processor
| GPU model | Tahiti | Malta |
|---|---|---|
| GPU variant | Tahiti XT (215-0821060) | Malta XT (215-0849026) |
| Architecture | GCN 1.0 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 4,313 million | 4,313 million |
| Die size | 352 mm² | 365 mm² |
Graphics Card
| Release date | Dec 22nd, 2011 | Apr 24th, 2013 |
|---|---|---|
| Generation | Southern Islands | Sea Islands |
| Production | End-of-life | End-of-life |
| Launch price | 549 USD | — |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x16 |
| Reviews | 191 in our database | — |
| gpu.details.availability | Jan 9th, 2012 | — |
| Predecessor | Northern Islands | Southern Islands |
| Successor | Sea Islands | Volcanic Islands |
Clocks
| GPU clock | 925 MHz | — |
|---|---|---|
| Memory clock | 1375 MHz 5.5 Gbps effective | 1500 MHz 6 Gbps effective |
| Base clock | — | 950 MHz |
| Boost clock | — | 1000 MHz |
Memory Configuration
| Memory size | 3 GB | 3 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 384 bit | 384 bit |
| Bandwidth | 264.0 GB/s | 288.0 GB/s |
Render Configuration
| Shading units | 2048 | 2048 |
|---|---|---|
| TMUs | 128 | 128 |
| ROPs | 32 | 32 |
| Compute units | 32 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 768 KB | 768 KB |
Performance
| Pixel rate | 29.60 GPixel/s | 32.00 GPixel/s |
|---|---|---|
| Texture rate | 118.4 GTexel/s | 128.0 GTexel/s |
| FP32 (float) performance | 3.789 TFLOPS | 4.096 TFLOPS |
| FP64 (double) performance | 947.2 GFLOPS (1:4) | 1,024 GFLOPS (1:4) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| Length | 275 mm 10.8 inches | 307 mm 12.1 inches |
| Width | 111 mm 4.4 inches | — |
| Height | 38 mm 1.5 inches | — |
| TDP | 250 W | 375 W |
| Suggested PSU | 600 W | 750 W |
| Outputs | 1x DVI1x HDMI2x mini-DisplayPort | 1x DVI4x mini-DisplayPort |
| Power connectors | 1x 6-pin + 1x 8-pin | 2x 8-pin |
| Board number | C386-37 | — |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 5.1 |
