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GPU Comparison
NVIDIA GeForce 8400 GS Rev. 2 vs NVIDIA GeForce GT 640
NVIDIA GeForce 8400 GS Rev. 2 vs NVIDIA GeForce GT 640
VS
NVIDIA GeForce 8400 GS Rev. 2
NVIDIA GeForce GT 640
We compared two Desktop platform GPUs: 512MB VRAM GeForce 8400 GS Rev. 2 and 2GB VRAM GeForce GT 640 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce 8400 GS Rev. 2 's Advantages
Lower TDP (25W vs 65W)
NVIDIA GeForce GT 640 's Advantages
Released 4 years and 6 months late
Larger VRAM bandwidth (28.51GB/s vs 6.400GB/s)
376 additional rendering cores
Score
Benchmark
FP32 (float)
GeForce 8400 GS Rev. 2
0.022 TFLOPS
GeForce GT 640
+3050%
0.693 TFLOPS
GeForce 8400 GS Rev. 2
VS
GeForce GT 640
Graphics Card
Dec 2007
Release Date
Jun 2012
GeForce 8
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
-
-
Boost Clock
-
400 MHz
Memory Clock
891 MHz
Memory
512MB
Memory Size
2GB
DDR2
Memory Type
DDR3
64bit
Memory Bus
128bit
6.400GB/s
Bandwidth
28.51GB/s
Render Config
1
SM Count
-
-
Compute Units
-
8
Shading Units
384
4
TMUs
32
4
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
-
L1 Cache
16 KB (per SMX)
16 KB
L2 Cache
256 KB
Theoretical Performance
2.268 GPixel/s
Pixel Rate
7.216 GPixel/s
2.268 GTexel/s
Texture Rate
28.86 GTexel/s
-
FP16 (half)
-
22.40 GFLOPS
FP32 (float)
692.7 GFLOPS
-
FP64 (double)
28.86 GFLOPS
Graphics Processor
G98
GPU Name
GK107
-
GPU Variant
GK107-300-A2
Tesla
Architecture
Kepler
TSMC
Foundry
TSMC
65 nm
Process Size
28 nm
0.21 billion
Transistors
1.27 billion
86 mm²
Die Size
118 mm²
Board Design
25W
TDP
65W
200 W
Suggested PSU
250 W
1x DVI 1x VGA 1x S-Video
Outputs
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
None
Power Connectors
None
Graphics Features
11.1 (10_0)
DirectX
12 (11_0)
3.3
OpenGL
4.6
1.1
OpenCL
3.0
N/A
Vulkan
1.1
1.1
CUDA
3.0
4.0
Shader Model
5.1
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9
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10
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