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GPU Comparison
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon HD 7970 X2
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon HD 7970 X2
VS
NVIDIA GeForce GT 640 Rev. 2
AMD Radeon HD 7970 X2
We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 and 3GB VRAM Radeon HD 7970 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 Rev. 2 's Advantages
Released 9 months late
Lower TDP (49W vs 500W)
AMD Radeon HD 7970 X2 's Advantages
More VRAM (3GB vs 1GB)
Larger VRAM bandwidth (264.0GB/s vs 40.06GB/s)
1664 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640 Rev. 2
0.803 TFLOPS
Radeon HD 7970 X2
+371%
3.789 TFLOPS
GeForce GT 640 Rev. 2
VS
Radeon HD 7970 X2
Graphics Card
May 2013
Release Date
Aug 2012
GeForce 600
Generation
Southern Islands
Desktop
Type
Desktop
PCIe 2.0 x8
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
1252 MHz
Memory Clock
1375 MHz
Memory
1024MB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
64bit
Memory Bus
384bit
40.06GB/s
Bandwidth
264.0GB/s
Render Config
-
SM Count
-
-
Compute Units
32
384
Shading Units
2048
32
TMUs
128
8
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
Theoretical Performance
8.368 GPixel/s
Pixel Rate
29.60 GPixel/s
33.47 GTexel/s
Texture Rate
118.4 GTexel/s
-
FP16 (half)
-
803.3 GFLOPS
FP32 (float)
3.789 TFLOPS
33.47 GFLOPS
FP64 (double)
947.2 GFLOPS
Graphics Processor
GK208
GPU Name
New Zealand
GK208-400-A1
GPU Variant
-
Kepler 2.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.02 billion
Transistors
4.313 billion
87 mm²
Die Size
352 mm²
Board Design
49W
TDP
500W
200 W
Suggested PSU
900 W
1x DVI 1x HDMI 1.4a 1x VGA
Outputs
2x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2
None
Power Connectors
3x 8-pin
Graphics Features
12 (11_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
3.0
OpenCL
1.2
1.1
Vulkan
1.2
3.5
CUDA
-
5.1
Shader Model
5.1
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2
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3
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4
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5
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6
NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce 8400 GS PCI
7
NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce GTX 760 OEM Rebrand
8
NVIDIA GeForce GT 640 Rev. 2 vs ATI Radeon HD 4350 PCIe x1
9
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon RX 6300
10
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon PRO W7700
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