GeForce GT 640 vs Radeon HD 7770 GHz Edition
Summary
Reasons to consider GeForce GT 640 |
| 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| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |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 7770 GHz Edition |
| Around 90% 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| Based on an outdated architecture (AMD GCN), there may be no performance optimizations for current games and applications |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 7770 GHz Edition
The Radeon HD 7770 GHz Edition is the better performing card based on the synthetic benchmarks used (1 benchmarks).
Core Configuration
| GeForce GT 640 | | Radeon HD 7770 GHz Edition | |
|---|
| GPU Name | GK107 (GK107-300-A2) | vs | Cape Verde (Cape Verde XT) |
| Fab Process | 28 nm | vs | 28 nm |
| Die Size | 118 mm² | vs | 123 mm² |
| Transistors | 1,270 million | vs | 1,500 million |
| Shaders | 384 | vs | 640 |
| Compute Units | 2 | vs | 10 |
| Core clock | 902 MHz | vs | 1000 MHz |
| ROPs | 16 | vs | 16 |
| TMUs | 32 | vs | 40 |
Memory Configuration
| GeForce GT 640 | | Radeon HD 7770 GHz Edition | |
|---|
| Memory Type | DDR3 | vs | GDDR5 |
| Bus Width | 128 bit | vs | 128 bit |
| Memory Speed | 891 MHz
1782 MHz effective | vs | 1125 MHz
4500 MHz effective |
| Memory Size | 2048 Mb | vs | 1024 Mb |
Additional details
| GeForce GT 640 | | Radeon HD 7770 GHz Edition | |
|---|
| TDP | 65 watts | vs | 80 watts |
| Release Date | 5 Jun 2012 | vs | 15 Feb 2012 |
GigaPixels - higher is better
GigaTexels - higher is better
GFLOPs - higher is better
Points (higher is better)