NVIDIA GeForce GTX 660 Rev. 2 vs NVIDIA GeForce GT 640M Mac Edition

Comparative analysis of NVIDIA GeForce GTX 660 Rev. 2 and NVIDIA GeForce GT 640M Mac Edition videocards for all known characteristics in the following categories: Essentials, Technical info, Video outputs and ports, Compatibility, dimensions and requirements, API support, Memory. Benchmark videocards performance analysis: CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).

 

Differences

Reasons to consider the NVIDIA GeForce GTX 660 Rev. 2

  • Videocard is newer: launch date 1 year(s) 7 month(s) later
  • Around 32% higher core clock speed: 980 MHz vs 745 MHz
  • 3.5x more texture fill rate: 82.56 GTexel / s vs 23.84 GTexel / s
  • 2.5x more pipelines: 960 vs 384
  • 3.5x better floating-point performance: 1,981 gflops vs 572.2 gflops
  • 4x more maximum memory size: 2 GB vs 512 MB
  • Around 20% higher memory clock speed: 6008 MHz vs 5000 MHz
  • 6x better performance in CompuBench 1.5 Desktop - Face Detection (mPixels/s): 39.216 vs 6.577
  • 2.1x better performance in CompuBench 1.5 Desktop - T-Rex (Frames/s): 1.173 vs 0.559
Specifications (specs)
Launch date 13 September 2014 vs 3 February 2013
Core clock speed 980 MHz vs 745 MHz
Texture fill rate 82.56 GTexel / s vs 23.84 GTexel / s
Pipelines 960 vs 384
Floating-point performance 1,981 gflops vs 572.2 gflops
Maximum memory size 2 GB vs 512 MB
Memory clock speed 6008 MHz vs 5000 MHz
Benchmarks
CompuBench 1.5 Desktop - Face Detection (mPixels/s) 39.216 vs 6.577
CompuBench 1.5 Desktop - T-Rex (Frames/s) 1.173 vs 0.559

Reasons to consider the NVIDIA GeForce GT 640M Mac Edition

  • 4.4x lower typical power consumption: 32 Watt vs 140 Watt
Thermal Design Power (TDP) 32 Watt vs 140 Watt

Compare benchmarks

GPU 1: NVIDIA GeForce GTX 660 Rev. 2
GPU 2: NVIDIA GeForce GT 640M Mac Edition

CompuBench 1.5 Desktop - Face Detection (mPixels/s)
GPU 1
GPU 2
39.216
6.577
CompuBench 1.5 Desktop - T-Rex (Frames/s)
GPU 1
GPU 2
1.173
0.559
Name NVIDIA GeForce GTX 660 Rev. 2 NVIDIA GeForce GT 640M Mac Edition
CompuBench 1.5 Desktop - Face Detection (mPixels/s) 39.216 6.577
CompuBench 1.5 Desktop - T-Rex (Frames/s) 1.173 0.559
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s) 226.218
CompuBench 1.5 Desktop - Video Composition (Frames/s) 11.947
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s) 12.554
GFXBench 4.0 - Car Chase Offscreen (Frames) 1706
GFXBench 4.0 - Manhattan (Frames) 2983
GFXBench 4.0 - T-Rex (Frames) 5586
GFXBench 4.0 - Car Chase Offscreen (Fps) 28.9
GFXBench 4.0 - Manhattan (Fps) 48.1
GFXBench 4.0 - T-Rex (Fps) 99.8

Compare specifications (specs)

NVIDIA GeForce GTX 660 Rev. 2 NVIDIA GeForce GT 640M Mac Edition

Essentials

Architecture Kepler Kepler
Code name GK104 GK107
Launch date 13 September 2014 3 February 2013
Place in performance rating 1513 1514
Type Desktop Desktop

Technical info

Boost clock speed 1032 MHz
Core clock speed 980 MHz 745 MHz
Floating-point performance 1,981 gflops 572.2 gflops
Manufacturing process technology 28 nm 28 nm
Pipelines 960 384
Texture fill rate 82.56 GTexel / s 23.84 GTexel / s
Thermal Design Power (TDP) 140 Watt 32 Watt
Transistor count 3,540 million 1,270 million

Video outputs and ports

Display Connectors 2x DVI, 1x HDMI, 1x DisplayPort No outputs

Compatibility, dimensions and requirements

Interface PCIe 3.0 x16 PCIe 3.0 x16
Length 241 mm
Supplementary power connectors 1x 6-pin

API support

DirectX 12.0 (11_0) 12.0 (11_0)
OpenGL 4.6 4.6

Memory

Maximum RAM amount 2 GB 512 MB
Memory bandwidth 144.2 GB / s 40 GB / s
Memory bus width 192 Bit 64 Bit
Memory clock speed 6008 MHz 5000 MHz
Memory type GDDR5 GDDR5