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GPU Comparison
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon Sky 700
NVIDIA GeForce GT 640 Rev. 2 vs AMD Radeon Sky 700
VS
NVIDIA GeForce GT 640 Rev. 2
AMD Radeon Sky 700
We compared two Desktop platform GPUs: 1024MB VRAM GeForce GT 640 Rev. 2 and 6GB VRAM Radeon Sky 700 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
Lower TDP (49W vs 225W)
AMD Radeon Sky 700 's Advantages
More VRAM (6GB vs 1GB)
Larger VRAM bandwidth (264.0GB/s vs 40.06GB/s)
1408 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce GT 640 Rev. 2
0.803 TFLOPS
Radeon Sky 700
+301%
3.226 TFLOPS
GeForce GT 640 Rev. 2
VS
Radeon Sky 700
Graphics Card
May 2013
Release Date
Mar 2013
GeForce 600
Generation
Radeon Sky
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
6GB
GDDR5
Memory Type
GDDR5
64bit
Memory Bus
384bit
40.06GB/s
Bandwidth
264.0GB/s
Render Config
-
SM Count
-
-
Compute Units
28
384
Shading Units
1792
32
TMUs
112
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
28.80 GPixel/s
33.47 GTexel/s
Texture Rate
100.8 GTexel/s
-
FP16 (half)
-
803.3 GFLOPS
FP32 (float)
3.226 TFLOPS
33.47 GFLOPS
FP64 (double)
806.4 GFLOPS
Graphics Processor
GK208
GPU Name
Tahiti
GK208-400-A1
GPU Variant
Tahiti PRO GL
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
225W
200 W
Suggested PSU
550 W
1x DVI 1x HDMI 1.4a 1x VGA
Outputs
1x DisplayPort 1.2
None
Power Connectors
1x 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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4
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6
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7
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8
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9
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10
NVIDIA GeForce GT 640 Rev. 2 vs NVIDIA GeForce RTX 4070 SUPER
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