Radeon HD 6870 X2 vs Radeon HD 7990
Summary
Reasons to consider Radeon HD 6870 X2 |
| 75 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 7990 . |
| Based on an outdated architecture (ATI TeraScale), there are no performance optimizations for current games and applications |
Reasons to consider Radeon HD 7990 |
| This is a much newer product, it might have better long term support. |
| Higher theoretical gaming performance, based on specifications. |
| Supports Direct3D 12 Async Compute |
| Supports ReLive (allows game streaming/recording with minimum performance penalty) |
| Supports Mantle |
| Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications |
HWBench recommends Radeon HD 7990
Based on theoretical specifications.
Core Configuration
| Radeon HD 6870 X2 | | Radeon HD 7990 | |
|---|
| GPU Name | Barts (Barts XT) | vs | Malta () |
| Fab Process | 40 nm | vs | 28 nm |
| Die Size | 255 mm² | vs | 365 mm² |
| Transistors | 1,700 million | vs | 4,313 million |
| Shaders | 1120 | vs | 2048 |
| Compute Units | 14 | vs | 32 |
| Core clock | 900 MHz | vs | 950 MHz |
| ROPs | 32 | vs | 32 |
| TMUs | 56 | vs | 128 |
Memory Configuration
| Radeon HD 6870 X2 | | Radeon HD 7990 | |
|---|
| Memory Type | GDDR5 | vs | GDDR5 |
| Bus Width | 256 bit x2 | vs | 384 bit x2 |
| Memory Speed | 1050 MHz
4200 MHz effective | vs | 1500 MHz
6000 MHz effective |
| Memory Size | 1024 Mb | vs | 3072 Mb |
Additional details
| Radeon HD 6870 X2 | | Radeon HD 7990 | |
|---|
| TDP | 300 watts | vs | 375 watts |
| Release Date | 8 Jul 2011 | vs | 24 Apr 2013 |
Radeon HD 6870 X2
57.60 GP/s
Radeon HD 7990
60.80 GP/s
GigaPixels - higher is better
Radeon HD 6870 X2
100.80 GT/s
Radeon HD 7990
244.00 GT/s
GigaTexels - higher is better
Radeon HD 6870 X2
268.00 GB/s
Radeon HD 7990
576.00 GB/s
GB/s - higher is better
Radeon HD 6870 X2
4032.00 GFLOPs
Radeon HD 7990
7782.00 GFLOPs
GFLOPs - higher is better