Radeon HD 2900 XT 1Gb GDDR4
A variation of the Radeon HD 2900 XT with 1 gigabyte of DDR-4 memory on board. In games at that time, video memory volumes over 512 MB simply could not be used even at extreme resolutions with full-screen anti-aliasing enabled.
Increasing the memory frequency from 1650 to 2000 MHz could also do little with a 512-bit access bus, especially since the main factor hindering the R600's performance was by no means the memory subsystem. As a result, the ATI Radeon HD 2900 XT 1GB outperformed its predecessor with 512 MB GDDR3 memory by 4...5% at best, and more often than not showed almost the same performance.
Specifications ATI Radeon HD 2900 XT 1Gb GDDR4
| Name | Radeon HD 2900 XT 1Gb GDDR4 |
| Core | R600 |
| Process technology (µm) | 0.08 |
| Transistors (million) | 720 |
| Core frequency | 740 |
| Memory frequency (DDR) | 1000 (2000) |
| Bus and memory type | GDDR4 512bit |
| Bandwidth (Gb/s) | 128 |
| Unified shader blocks | 320 |
| Frequency of unified shader units | 740 |
| TMU per conveyor | 16 (total) |
| ROP | 16 |
| textures per clock | 16 |
| textures per pass | 16 |
| Shader Model | 4.0 |
| Fill Rate (Mpix/s) | 11840 |
| Fill Rate (Mtex/s) | 11840 |
| DirectX | 10.0 |
| Anti-Aliasing (Max) | MS-24x |
| Anisotropic Filtering (Max) | 16x Quality |
| Memory | 1024 |
| Interface | PCI-E |
| RAMDAC | 2x400 |
NFS Carbon
