GeForce GT 645 OEM vs GeForce GT 640
Summary
Reasons to consider GeForce GT 645 OEM |
| Higher theoretical gaming performance, based on specifications. |
| Supports PhysX |
| Based on an outdated architecture (Nvidia Fermi), there are no performance optimizations for current games and applications |
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| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |
HWBench recommends GeForce GT 645 OEM
Based on theoretical specifications.
Core Configuration
| GeForce GT 645 OEM | | GeForce GT 640 | |
|---|
| GPU Name | GF114 () | vs | GK107 (GK107-300-A2) |
| Fab Process | 40 nm | vs | 28 nm |
| Die Size | 332 mm² | vs | 118 mm² |
| Transistors | 1,950 million | vs | 1,270 million |
| Shaders | 288 | vs | 384 |
| Compute Units | 6 | vs | 2 |
| Core clock | 776 MHz | vs | 902 MHz |
| ROPs | 24 | vs | 16 |
| TMUs | 48 | vs | 32 |
Memory Configuration
| GeForce GT 645 OEM | | GeForce GT 640 | |
|---|
| Memory Type | GDDR5 | vs | DDR3 |
| Bus Width | 192 bit | vs | 128 bit |
| Memory Speed | 957 MHz
3828 MHz effective | vs | 891 MHz
1782 MHz effective |
| Memory Size | 1024 Mb | vs | 2048 Mb |
Additional details
| GeForce GT 645 OEM | | GeForce GT 640 | |
|---|
| TDP | 102 watts | vs | 65 watts |
| Release Date | 24 Apr 2012 | vs | 5 Jun 2012 |
GeForce GT 645 OEM
9.31 GP/s
GeForce GT 640
7.22 GP/s
GigaPixels - higher is better
GeForce GT 645 OEM
37.20 GT/s
GeForce GT 640
28.90 GT/s
GigaTexels - higher is better
GeForce GT 645 OEM
91.90 GB/s
GeForce GT 640
28.50 GB/s
GB/s - higher is better
GeForce GT 645 OEM
894.00 GFLOPs
GeForce GT 640
692.70 GFLOPs
GFLOPs - higher is better