GeForce GTX 645 OEM vs GeForce GTX 745 OEM

GeForce GTX 645 OEM
Memory: 1024Mb GDDR5DESKTOP
Release date: 22 Apr 2013
GeForce GTX 645 OEM
GeForce GTX 745 OEM
Memory: 4096Mb DDR3DESKTOP
Release date: 18 Feb 2014
GeForce GTX 745 OEM

Summary

Reasons to consider GeForce GTX 645 OEM

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Based on an outdated architecture (Nvidia Kepler), there are less performance optimizations for current games and applications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 745 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Based on an outdated architecture (Nvidia Maxwell), there may be no performance optimizations for current games and applications

No clear winner declared

We have no data to declare a winner at this time.


Specifications

Core Configuration

GeForce GTX 645 OEMGeForce GTX 745 OEM
GPU NameGK106 ()vsGM107 (GM107-300-A2)
Fab Process28 nmvs28 nm
Die Size221 mm²vs148 mm²
Transistors2,540 millionvs1,870 million
Shaders576vs384
Compute Units3vs3
Core clock824 MHzvs1033 MHz
ROPs16vs16
TMUs48vs24

Memory Configuration

GeForce GTX 645 OEMGeForce GTX 745 OEM
Memory TypeGDDR5vsDDR3
Bus Width128 bitvs128 bit
Memory Speed1000 MHz
4000 MHz effective
vs900 MHz
1800 MHz effective
Memory Size1024 Mbvs4096 Mb

Additional details

GeForce GTX 645 OEMGeForce GTX 745 OEM
TDP65 wattsvs55 watts
Release Date22 Apr 2013vs18 Feb 2014

Raw Performance comparison

Pixel Rate

  • GeForce GTX 645 OEM
    9.89 GP/s
  • GeForce GTX 745 OEM
    16.50 GP/s

GigaPixels - higher is better

Texel Rate

  • GeForce GTX 645 OEM
    39.60 GT/s
  • GeForce GTX 745 OEM
    24.80 GT/s

GigaTexels - higher is better

Memory bandwidth

  • GeForce GTX 645 OEM
    64.00 GB/s
  • GeForce GTX 745 OEM
    28.80 GB/s

GB/s - higher is better

Single precision performance

  • GeForce GTX 645 OEM
    949.20 GFLOPs
  • GeForce GTX 745 OEM
    793.30 GFLOPs

GFLOPs - higher is better