GeForce GT 640 vs Radeon HD 7990
Summary
GeForce GT 640
100%
Radeon HD 7990
846%
Relative performance
Reasons to consider GeForce GT 640 |
| 310 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 7990 . |
| Supports PhysX |
| Supports G-Sync |
| Supports ShadowPlay (allows game streaming/recording with minimum performance penalty) |
| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |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. |
| Around 746% higher average synthetic performance. |
| 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| Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications |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
The Radeon HD 7990 is the better performing card based on the synthetic benchmarks used (1 benchmarks).
Core Configuration
| GeForce GT 640 | | Radeon HD 7990 | |
|---|
| GPU Name | GK107 (GK107-300-A2) | vs | Malta () |
| Fab Process | 28 nm | vs | 28 nm |
| Die Size | 118 mm² | vs | 365 mm² |
| Transistors | 1,270 million | vs | 4,313 million |
| Shaders | 384 | vs | 2048 |
| Compute Units | 2 | vs | 32 |
| Core clock | 902 MHz | vs | 950 MHz |
| ROPs | 16 | vs | 32 |
| TMUs | 32 | vs | 128 |
Memory Configuration
| GeForce GT 640 | | Radeon HD 7990 | |
|---|
| Memory Type | DDR3 | vs | GDDR5 |
| Bus Width | 128 bit | vs | 384 bit x2 |
| Memory Speed | 891 MHz
1782 MHz effective | vs | 1500 MHz
6000 MHz effective |
| Memory Size | 2048 Mb | vs | 3072 Mb |
Additional details
| GeForce GT 640 | | Radeon HD 7990 | |
|---|
| TDP | 65 watts | vs | 375 watts |
| Release Date | 5 Jun 2012 | vs | 24 Apr 2013 |
GeForce GT 640
7.22 GP/s
Radeon HD 7990
60.80 GP/s
GigaPixels - higher is better
GeForce GT 640
28.90 GT/s
Radeon HD 7990
244.00 GT/s
GigaTexels - higher is better
GeForce GT 640
28.50 GB/s
Radeon HD 7990
576.00 GB/s
GB/s - higher is better
GeForce GT 640
692.70 GFLOPs
Radeon HD 7990
7782.00 GFLOPs
GFLOPs - higher is better
GeForce GT 640
2190
Radeon HD 7990
18530
Points (higher is better)