GeForce GT 640 OEM Rebrand vs Radeon HD 7970 GHz Edition

GeForce GT 640 OEM Rebrand
Memory: 1536Mb DDR3DESKTOP
Release date: 24 Apr 2012
GeForce GT 640 OEM Rebrand
Radeon HD 7970 GHz Edition
Memory: 3072Mb GDDR5DESKTOP
Release date: 22 Jun 2012
Radeon HD 7970 GHz Edition
You are comparing OEM or variant versions of at least one VGA. Did you mean GeForce GT 640 vs Radeon HD 7970 GHz Edition instead?

Summary

Reasons to consider GeForce GT 640 OEM Rebrand

225 watts lower power draw. This might be a strong point if your current power supply is not enough to handle the Radeon HD 7970 GHz Edition .
Supports PhysX.
Based on an outdated architecture (Nvidia Fermi), there are no performance optimizations for current games and applications.

Reasons to consider Radeon HD 7970 GHz Edition

Higher theoretical gaming performance, based on specifications.
Supports Direct3D 12 Async Compute.
Supports ReLive (allows game streaming/recording with minimum performance penalty).
Supports Mantle.

Radeon HD 7970 GHz Edition

HWBench recommends Radeon HD 7970 GHz Edition

Based on theoretical specifications.


Specifications

Core Configuration

GeForce GT 640 OEM RebrandRadeon HD 7970 GHz Edition
GPU NameGF116 (GF116-150-A1)vsTahiti (Tahiti XT2)
Fab Process40 nmvs28 nm
Die Size238 mm²vs352 mm²
Transistors1,170 millionvs4,313 million
Shaders144vs2048
Compute Units3vs32
Core clock720 MHzvs1000 MHz
ROPs24vs32
TMUs24vs128

Memory Configuration

GeForce GT 640 OEM RebrandRadeon HD 7970 GHz Edition
Memory TypeDDR3vsGDDR5
Bus Width192 bitvs384 bit
Memory Speed800 MHz
1600 MHz effective
vs1500 MHz
6000 MHz effective
Memory Size1536 Mbvs3072 Mb

Additional details

GeForce GT 640 OEM RebrandRadeon HD 7970 GHz Edition
TDP75 wattsvs300 watts
Release Date24 Apr 2012vs22 Jun 2012

Raw Performance comparison

Pixel Rate

  • GeForce GT 640 OEM Rebrand
    4.32 GP/s
  • Radeon HD 7970 GHz Edition
    32.00 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GT 640 OEM Rebrand
    17.30 GT/s
  • Radeon HD 7970 GHz Edition
    128.00 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GT 640 OEM Rebrand
    38.40 GB/s
  • Radeon HD 7970 GHz Edition
    288.00 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GT 640 OEM Rebrand
    414.70 GFLOPs
  • Radeon HD 7970 GHz Edition
    4096.00 GFLOPs

GFLOPs - higher is better