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/ Comparison of Sapphire Radeon HD 6670 and GeForce GT 640M Mac
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Comparison of Sapphire Radeon HD 6670 and GeForce GT 640M Mac
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Attribute
GeForce GT 640M Mac
×
Sapphire Radeon HD 6670
×
GPU
Release year (year)
2013
2011
Reference card
-
AMD Radeon HD 6670 800 MHz 1 GB
GPU brand
Nvidia
AMD
GPU name
GK107
Turks XT
Market
Laptop
Desktop
Clock speed (MHz)
745
800
Is dual GPU
-
-
Model
GeForce GT 640M Mac
Sapphire Radeon HD 6670
Memory
Memory (MB)
512
1,024
Memory bandwidth (GB/s)
40
64
Memory bus (bit)
64
128
Memory type
GDDR5
GDDR5
Memory clock speed (MHz)
1,250
1,000
Effective memory clock speed (MHz)
5,000
4,000
Noise and power
TDP (W)
32
66
Load power consumption (W)
-
220
Idle power consumption (W)
-
106
Raw performance
Pixel rate (GPixel/s)
5.96
6.4
Render output processors
8
8
Texture mapping units
32
24
Shading units
384
480
Floating-point performance (GFLOPS)
572
768
Compute units
-
6
Texture rate (GTexel/s)
23.84
19.2
Benchmarks
1
↑
Metro: Last Light
-
30
Particle simulation (mInteraction/s)
69.88
-
T-Rex (Compubench 1.5) (frames/s)
0.56
-
Video composition (frames/s)
11.95
-
Bioshock Infinite
-
33
Face detection (mPixels/s)
6.58
5.23
T-Rex (GFXBench 3.0)
3356.32
3356.86
Manhattan (GFXBench 3.0)
2290.86
2774.23
Bitcoin mining (mHash/s)
12.55
38.55
Sky Diver Factor
-
88.99
Fire Strike Factor
-
10.55
Ocean surface simulation (frames/s)
226.22
-
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