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GPU Comparison
NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon HD 6870 X2
NVIDIA GeForce GT 640 OEM Rebrand vs AMD Radeon HD 6870 X2
VS
NVIDIA GeForce GT 640 OEM Rebrand
AMD Radeon HD 6870 X2
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 9 months late
More VRAM (1536GB vs 1024GB)
Lower TDP (75W vs 300W)
AMD Radeon HD 6870 X2 's Advantages
Larger VRAM bandwidth (134.4GB/s vs 38.40GB/s)
976 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Radeon HD 6870 X2
+385%
2.016 TFLOPS
GeForce GT 640 OEM Rebrand
VS
Radeon HD 6870 X2
Graphics Card
Apr 2012
Release Date
Jul 2011
GeForce 600
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
800 MHz
Memory Clock
1050 MHz
Memory
1536MB
Memory Size
1024MB
DDR3
Memory Type
GDDR5
192bit
Memory Bus
256bit
38.40GB/s
Bandwidth
134.4GB/s
Render Config
3
SM Count
-
-
Compute Units
14
144
Shading Units
1120
24
TMUs
56
24
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
64 KB (per SM)
L1 Cache
8 KB (per CU)
384 KB
L2 Cache
512 KB
Theoretical Performance
4.320 GPixel/s
Pixel Rate
28.80 GPixel/s
17.28 GTexel/s
Texture Rate
50.40 GTexel/s
-
FP16 (half)
-
414.7 GFLOPS
FP32 (float)
2.016 TFLOPS
34.56 GFLOPS
FP64 (double)
-
Graphics Processor
GF116
GPU Name
Barts
GF116-150-A1
GPU Variant
Barts XT (215-0798000)
Fermi 2.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
1.17 billion
Transistors
1.7 billion
238 mm²
Die Size
255 mm²
Board Design
75W
TDP
300W
250 W
Suggested PSU
700 W
2x DVI 1x mini-HDMI 1.3a
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
None
Power Connectors
-
Graphics Features
12 (11_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.1
OpenCL
1.2
N/A
Vulkan
N/A
2.1
CUDA
-
5.1
Shader Model
5.0
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