GeForce GT 640 vs GeForce GTX 645 OEM
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| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |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 GeForce GTX 645 OEM |
| This is a much newer product, it might have better long term support. |
| Higher theoretical gaming performance, based on specifications. |
| 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| Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications |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 GTX 645 OEM
Based on theoretical specifications.
Core Configuration
| GeForce GT 640 | | GeForce GTX 645 OEM | |
|---|
| GPU Name | GK107 (GK107-300-A2) | vs | GK106 () |
| Fab Process | 28 nm | vs | 28 nm |
| Die Size | 118 mm² | vs | 221 mm² |
| Transistors | 1,270 million | vs | 2,540 million |
| Shaders | 384 | vs | 576 |
| Compute Units | 2 | vs | 3 |
| Core clock | 902 MHz | vs | 824 MHz |
| ROPs | 16 | vs | 16 |
| TMUs | 32 | vs | 48 |
Memory Configuration
| GeForce GT 640 | | GeForce GTX 645 OEM | |
|---|
| Memory Type | DDR3 | vs | GDDR5 |
| Bus Width | 128 bit | vs | 128 bit |
| Memory Speed | 891 MHz
1782 MHz effective | vs | 1000 MHz
4000 MHz effective |
| Memory Size | 2048 Mb | vs | 1024 Mb |
Additional details
| GeForce GT 640 | | GeForce GTX 645 OEM | |
|---|
| TDP | 65 watts | vs | 65 watts |
| Release Date | 5 Jun 2012 | vs | 22 Apr 2013 |
GeForce GT 640
7.22 GP/s
GeForce GTX 645 OEM
9.89 GP/s
GigaPixels - higher is better
GeForce GT 640
28.90 GT/s
GeForce GTX 645 OEM
39.60 GT/s
GigaTexels - higher is better
GeForce GT 640
28.50 GB/s
GeForce GTX 645 OEM
64.00 GB/s
GB/s - higher is better
GeForce GT 640
692.70 GFLOPs
GeForce GTX 645 OEM
949.20 GFLOPs
GFLOPs - higher is better