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GPU Comparison
NVIDIA GeForce GT 640 OEM vs NVIDIA T400 4 GB
NVIDIA GeForce GT 640 OEM vs NVIDIA T400 4 GB
VS
NVIDIA GeForce GT 640 OEM
NVIDIA T400 4 GB
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 OEM and 4GB VRAM T400 4 GB to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA T400 4 GB 's Advantages
Released 9 years and 1 months late
Boost Clock1425MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (80.00GB/s vs 28.51GB/s)
Lower TDP (30W vs 50W)
Score
Benchmark
FP32 (float)
GeForce GT 640 OEM
0.612 TFLOPS
T400 4 GB
+78%
1.094 TFLOPS
GeForce GT 640 OEM
VS
T400 4 GB
Graphics Card
Apr 2012
Release Date
May 2021
GeForce 600
Generation
Quadro
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
420 MHz
-
Boost Clock
1425 MHz
891 MHz
Memory Clock
1250 MHz
Memory
2GB
Memory Size
4GB
DDR3
Memory Type
GDDR6
128bit
Memory Bus
64bit
28.51GB/s
Bandwidth
80.00GB/s
Render Config
-
SM Count
6
-
Compute Units
-
384
Shading Units
384
32
TMUs
24
16
ROPs
16
-
Tensor Cores
-
-
RT Cores
-
16 KB (per SMX)
L1 Cache
64 KB (per SM)
256 KB
L2 Cache
1024 KB
Theoretical Performance
6.376 GPixel/s
Pixel Rate
22.80 GPixel/s
25.50 GTexel/s
Texture Rate
34.20 GTexel/s
-
FP16 (half)
2.189 TFLOPS
612.1 GFLOPS
FP32 (float)
1094 GFLOPS
25.50 GFLOPS
FP64 (double)
34.20 GFLOPS
Graphics Processor
GK107
GPU Name
TU117
GK107-320-A2
GPU Variant
-
Kepler
Architecture
Turing
TSMC
Foundry
TSMC
28 nm
Process Size
12 nm
1.27 billion
Transistors
4.7 billion
118 mm²
Die Size
200 mm²
Board Design
50W
TDP
30W
250 W
Suggested PSU
200 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
3x mini-DisplayPort 1.4a
None
Power Connectors
None
Graphics Features
12 (11_0)
DirectX
12 (12_1)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.3
3.0
CUDA
7.5
5.1
Shader Model
6.6
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9
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10
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