GPU model | Caicos | R420 |
---|---|---|
GPU variant | Caicos XT (215-0804070) | R420 GL |
Architecture | TeraScale 2 | R400 |
Foundry | TSMC | TSMC |
Manufacturing process | 40 nm | 130 nm |
Number of transistors | 370 million | 160 million |
Die size | 67 mm² | 281 mm² |
Release date | Dec 21st, 2013 | Aug 3rd, 2004 |
---|---|---|
Generation | Volcanic Islands | FireGL |
Production | End-of-life | End-of-life |
Interface | PCIe 2.0 x16 | AGP 8x |
Predecessor | Sea Islands | — |
Successor | Pirate Islands | — |
Launch price | — | 1,099 USD |
Reviews | — | 226 in our database |
GPU clock | 775 MHz | 491 MHz |
---|---|---|
Memory clock | 900 MHz 1800 Mbps effective | 454 MHz 908 Mbps effective |
Memory size | 1024 MB | 256 MB |
---|---|---|
Memory type | DDR3 | GDDR3 |
Memory bus width | 64 bit | 256 bit |
Bandwidth | 14.40 GB/s | 29.06 GB/s |
Shading units | 160 | — |
---|---|---|
TMUs | 8 | 12 |
ROPs | 4 | 12 |
Compute units | 2 | — |
Cache L1 | 8 KB (per CU) | — |
Cache L2 | 128 KB | — |
Pixel shaders | — | 12 |
Vertex shaders | — | 6 |
Pixel rate | 3.100 GPixel/s | 5.892 GPixel/s |
---|---|---|
Texture rate | 6.200 GTexel/s | 5.892 GTexel/s |
FP32 (float) performance | 248.0 GFLOPS | — |
Vertex rate | — | 736.5 MVertices/s |
Slot width | Single-slot | Single-slot |
---|---|---|
Length | 168 mm 6.6 inches | — |
TDP | 35 W | 57 W |
Suggested PSU | 200 W | 250 W |
Outputs | 1x DVI1x HDMI | 2x DVI1x S-Video |
Power connectors | None | 1x Molex |
Board number | C264 | A301-01 |
DirectX | 11.2 (11_0) | 9.0b (9_2) |
---|---|---|
OpenGL | 4.4 | 2.1 |
OpenCL | 1.2 | — |
Vulkan | — | — |
Shader model | 5.0 | — |
Pixel shader | — | 2.0b |
Vertex shader | — | 2.0b |