NVIDIA GeForce GTX 490 vs NVIDIA GeForce GT 640
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 490 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 GTX 490 's Advantages
Larger VRAM bandwidth (164.0GB/s vs 28.51GB/s)
96 additional rendering cores
NVIDIA GeForce GT 640 's Advantages
More VRAM (2GB vs 1536GB)
Lower TDP (65W vs 365W)
Score
Benchmark
FP32 (float)
GeForce GTX 490
+68%
1.166 TFLOPS
GeForce GT 640
0.693 TFLOPS
Graphics Card
Unknown
Release Date
Jun 2012
GeForce 400
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
854 MHz
Memory Clock
891 MHz
Memory
1536MB
Memory Size
2GB
GDDR5
Memory Type
DDR3
384bit
Memory Bus
128bit
164.0GB/s
Bandwidth
28.51GB/s
Render Config
-
-
-
15
SM Count
-
480
Shading Units
384
60
TMUs
32
48
ROPs
16
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
16 KB (per SMX)
768 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
18.24 GPixel/s
Pixel Rate
7.216 GPixel/s
36.48 GTexel/s
Texture Rate
28.86 GTexel/s
-
-
-
1166 GFLOPS
FP32 (float)
692.7 GFLOPS
145.8 GFLOPS
FP64 (double)
28.86 GFLOPS
Board Design
365W
TDP
65W
750 W
Suggested PSU
250 W
3x DVI
1x mini-DisplayPort
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
2x 8-pin
Power Connectors
None
Graphics Processor
GF100
GPU Name
GK107
GF100-375-A3
GPU Variant
GK107-300-A2
Fermi
Architecture
Kepler
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
3.1 billion
Transistors
1.27 billion
529 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.1
OpenCL
3.0
N/A
Vulkan
1.1
2.0
CUDA
3.0
5.1
Shader Model
5.1
