GeForce GT 640 OEM vs GeForce GTX 770

GeForce GT 640 OEM
Memory: 2048Mb DDR3DESKTOP
Release date: 24 Apr 2012
GeForce GT 640 OEM
GeForce GTX 770
Memory: 2048Mb GDDR5DESKTOP
Release date: 30 May 2013
GeForce GTX 770
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Summary

Reasons to consider GeForce GT 640 OEM

180 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 770 .
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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications.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 770

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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications.

GeForce GTX 770

HWBench recommends GeForce GTX 770

Based on theoretical specifications.


Specifications

Core Configuration

GeForce GT 640 OEMGeForce GTX 770
GPU NameGK107 (GK107-300-A2)vsGK104 (GK104-425-A2)
Fab Process28 nmvs28 nm
Die Size118 mm²vs294 mm²
Transistors1,270 millionvs3,540 million
Shaders384vs1536
Compute Units2vs8
Core clock797 MHzvs1046 MHz
ROPs16vs32
TMUs32vs128

Memory Configuration

GeForce GT 640 OEMGeForce GTX 770
Memory TypeDDR3vsGDDR5
Bus Width128 bitvs256 bit
Memory Speed891 MHz
1782 MHz effective
vs1753 MHz
7012 MHz effective
Memory Size2048 Mbvs2048 Mb

Additional details

GeForce GT 640 OEMGeForce GTX 770
TDP50 wattsvs230 watts
Release Date24 Apr 2012vs30 May 2013

Raw Performance comparison

Pixel Rate

  • GeForce GT 640 OEM
    6.38 GP/s
  • GeForce GTX 770
    33.50 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GT 640 OEM
    25.50 GT/s
  • GeForce GTX 770
    134.00 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GT 640 OEM
    28.50 GB/s
  • GeForce GTX 770
    224.00 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GT 640 OEM
    612.10 GFLOPs
  • GeForce GTX 770
    3213.00 GFLOPs

GFLOPs - higher is better