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GPU Comparison
NVIDIA GeForce GT 640 vs ATI Radeon HD 3450
NVIDIA GeForce GT 640 vs ATI Radeon HD 3450
VS
NVIDIA GeForce GT 640
ATI Radeon HD 3450
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 256MB VRAM Radeon HD 3450 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 's Advantages
Released 4 years and 6 months late
More VRAM (2GB vs 256GB)
Larger VRAM bandwidth (28.51GB/s vs 8.000GB/s)
344 additional rendering cores
ATI Radeon HD 3450 's Advantages
Lower TDP (25W vs 65W)
Score
Benchmark
FP32 (float)
GeForce GT 640
+1343%
0.693 TFLOPS
Radeon HD 3450
0.048 TFLOPS
GeForce GT 640
VS
Radeon HD 3450
Graphics Card
Jun 2012
Release Date
Dec 2007
GeForce 600
Generation
Radeon R600
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
891 MHz
Memory Clock
500 MHz
Memory
2GB
Memory Size
256MB
DDR3
Memory Type
DDR2
128bit
Memory Bus
64bit
28.51GB/s
Bandwidth
8.000GB/s
Render Config
-
Compute Units
2
-
-
-
384
Shading Units
40
32
TMUs
4
16
ROPs
4
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
-
256 KB
L2 Cache
64 KB
-
-
-
Theoretical Performance
7.216 GPixel/s
Pixel Rate
2.400 GPixel/s
28.86 GTexel/s
Texture Rate
2.400 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
48.00 GFLOPS
28.86 GFLOPS
FP64 (double)
-
Board Design
65W
TDP
25W
250 W
Suggested PSU
200 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x VGA 1x S-Video
None
Power Connectors
None
Graphics Processor
GK107
GPU Name
RV620
GK107-300-A2
GPU Variant
RV620 LE
Kepler
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
1.27 billion
Transistors
0.181 billion
118 mm²
Die Size
67 mm²
Graphics Features
12 (11_0)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3
3.0
OpenCL
N/A
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
4.1
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