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GPU Comparison
NVIDIA GeForce GT 640 vs AMD Radeon HD 6850
NVIDIA GeForce GT 640 vs AMD Radeon HD 6850
VS
NVIDIA GeForce GT 640
AMD Radeon HD 6850
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM Radeon HD 6850 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 's Advantages
Released 1 years and 8 months late
More VRAM (2GB vs 1024GB)
Lower TDP (65W vs 127W)
AMD Radeon HD 6850 's Advantages
Larger VRAM bandwidth (128.0GB/s vs 28.51GB/s)
576 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640
0.693 TFLOPS
Radeon HD 6850
+114%
1.488 TFLOPS
GeForce GT 640
VS
Radeon HD 6850
Graphics Card
Jun 2012
Release Date
Oct 2010
GeForce 600
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
891 MHz
Memory Clock
1000 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
128bit
Memory Bus
256bit
28.51GB/s
Bandwidth
128.0GB/s
Render Config
-
Compute Units
12
-
-
-
384
Shading Units
960
32
TMUs
48
16
ROPs
32
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
512 KB
-
-
-
Theoretical Performance
7.216 GPixel/s
Pixel Rate
24.80 GPixel/s
28.86 GTexel/s
Texture Rate
37.20 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
1488 GFLOPS
28.86 GFLOPS
FP64 (double)
-
Board Design
65W
TDP
127W
250 W
Suggested PSU
300 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
None
Power Connectors
1x 6-pin
Graphics Processor
GK107
GPU Name
Barts
GK107-300-A2
GPU Variant
Barts PRO (215-0798006)
Kepler
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.27 billion
Transistors
1.7 billion
118 mm²
Die Size
255 mm²
Graphics Features
12 (11_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
3.0
OpenCL
1.2
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
5.0
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