GeForce GTX 680 Mac Edition vs GeForce GT 640 Rev. 2
We compared two Desktop platform GPUs: 2GB VRAM GeForce GTX 680 Mac Edition and 1024MB VRAM GeForce GT 640 Rev. 2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce GTX 680 Mac Edition 's Advantages
Boost Clock1058MHz
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (192.3GB/s vs 40.06GB/s)
1152 additional rendering cores
GeForce GT 640 Rev. 2 's Advantages
Lower TDP (49W vs 195W)
Score
Benchmark
FP32 (float)
GeForce GTX 680 Mac Edition
+304%
3250
GeForce GT 640 Rev. 2
803
Graphics Card
Apr 2013
Release Date
May 2013
GeForce 600
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x8
Clock Speeds
1006 MHz
Base Clock
-
1058 MHz
Boost Clock
-
1502 MHz
Memory Clock
1252 MHz
Memory
2GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
64bit
192.3GB/s
Bandwidth
40.06GB/s
Render Config
1536
Shading Units
384
128
TMUs
32
32
ROPs
8
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
512 KB
L2 Cache
512 KB
Theoretical Performance
33.86 GPixel/s
Pixel Rate
8.368 GPixel/s
135.4 GTexel/s
Texture Rate
33.47 GTexel/s
3.250 TFLOPS
FP32 (float)
803.3 GFLOPS
135.4 GFLOPS
FP64 (double)
33.47 GFLOPS
Board Design
195W
TDP
49W
450 W
Suggested PSU
200 W
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
Outputs
1x DVI
1x HDMI 1.4a
1x VGA
2x 6-pin
Power Connectors
None
Graphics Processor
GK104
GPU Name
GK208
GK104-400-A2
GPU Variant
GK208-400-A1
Kepler
Architecture
Kepler 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
3.54 billion
Transistors
1.02 billion
294 mm²
Die Size
87 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.0
CUDA
3.5
5.1
Shader Model
5.1
