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GPU Comparison
NVIDIA GeForce GT 640 vs AMD Radeon HD 8450 OEM
NVIDIA GeForce GT 640 vs AMD Radeon HD 8450 OEM
VS
NVIDIA GeForce GT 640
AMD Radeon HD 8450 OEM
We compared two Desktop platform GPUs: 2GB VRAM GeForce GT 640 and 1024MB VRAM Radeon HD 8450 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 's Advantages
More VRAM (2GB vs 1024GB)
Larger VRAM bandwidth (28.51GB/s vs 10.67GB/s)
224 additional rendering cores
AMD Radeon HD 8450 OEM 's Advantages
Released 7 months late
Lower TDP (18W vs 65W)
Score
Benchmark
FP32 (float)
GeForce GT 640
+246%
0.693 TFLOPS
Radeon HD 8450 OEM
0.2 TFLOPS
GeForce GT 640
VS
Radeon HD 8450 OEM
Graphics Card
Jun 2012
Release Date
Jan 2013
GeForce 600
Generation
Sea Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
891 MHz
Memory Clock
667 MHz
Memory
2GB
Memory Size
1024MB
DDR3
Memory Type
DDR3
128bit
Memory Bus
64bit
28.51GB/s
Bandwidth
10.67GB/s
Render Config
-
Compute Units
2
-
-
-
384
Shading Units
160
32
TMUs
8
16
ROPs
4
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
8 KB (per CU)
256 KB
L2 Cache
128 KB
-
-
-
Theoretical Performance
7.216 GPixel/s
Pixel Rate
2.500 GPixel/s
28.86 GTexel/s
Texture Rate
5.000 GTexel/s
-
-
-
692.7 GFLOPS
FP32 (float)
200.0 GFLOPS
28.86 GFLOPS
FP64 (double)
-
Board Design
65W
TDP
18W
250 W
Suggested PSU
200 W
1x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x DVI 1x HDMI 1.3a 1x VGA
None
Power Connectors
None
Graphics Processor
GK107
GPU Name
Caicos
GK107-300-A2
GPU Variant
Caicos PRO-L
Kepler
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
1.27 billion
Transistors
0.37 billion
118 mm²
Die Size
67 mm²
Graphics Features
12 (11_0)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
3.0
OpenCL
1.2
1.1
Vulkan
N/A
3.0
CUDA
-
5.1
Shader Model
5.0
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