GeForce GTX 555 OEM vs GeForce GT 640

GeForce GTX 555 OEM
Memory: 1024Mb GDDR5DESKTOP
Release date: 14 May 2011
GeForce GTX 555 OEM
GeForce GT 640
Memory: 2048Mb DDR3DESKTOP
Release date: 5 Jun 2012
GeForce GT 640

Summary

Reasons to consider GeForce GTX 555 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Based on an outdated architecture (Nvidia Fermi), there are no performance optimizations for current games and applications.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

85 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the GeForce GTX 555 OEM .
This is a much newer product, it might have better long term support.
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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications.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 555 OEM

HWBench recommends GeForce GTX 555 OEM

Based on theoretical specifications.



Specifications

Core Configuration

GeForce GTX 555 OEMGeForce GT 640
GPU NameGF114 ()vsGK107 (GK107-300-A2)
Fab Process40 nmvs28 nm
Die Size332 mm²vs118 mm²
Transistors1,950 millionvs1,270 million
Shaders288vs384
Compute Units6vs2
Core clock736 MHzvs902 MHz
ROPs24vs16
TMUs48vs32

Memory Configuration

GeForce GTX 555 OEMGeForce GT 640
Memory TypeGDDR5vsDDR3
Bus Width192 bitvs128 bit
Memory Speed957 MHz
3828 MHz effective
vs891 MHz
1782 MHz effective
Memory Size1024 Mbvs2048 Mb

Additional details

GeForce GTX 555 OEMGeForce GT 640
TDP150 wattsvs65 watts
Release Date14 May 2011vs5 Jun 2012

Raw Performance comparison

Pixel Rate

  • GeForce GTX 555 OEM
    8.83 GP/s
  • GeForce GT 640
    7.22 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GTX 555 OEM
    35.30 GT/s
  • GeForce GT 640
    28.90 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GTX 555 OEM
    91.90 GB/s
  • GeForce GT 640
    28.50 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GTX 555 OEM
    847.90 GFLOPs
  • GeForce GT 640
    692.70 GFLOPs

GFLOPs - higher is better