NVIDIA GeForce GTX 490 vs NVIDIA GeForce GT 640 OEM Rebrand
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GTX 490 and 1536MB VRAM GeForce GT 640 OEM Rebrand 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 38.40GB/s)
336 additional rendering cores
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Lower TDP (75W vs 365W)
Score
Benchmark
FP32 (float)
GeForce GTX 490
+180%
1.166 TFLOPS
GeForce GT 640 OEM Rebrand
0.415 TFLOPS
Graphics Card
Unknown
Release Date
Apr 2012
GeForce 400
Generation
GeForce 600
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
854 MHz
Memory Clock
800 MHz
Memory
1536MB
Memory Size
1536MB
GDDR5
Memory Type
DDR3
384bit
Memory Bus
192bit
164.0GB/s
Bandwidth
38.40GB/s
Render Config
-
-
-
15
SM Count
3
480
Shading Units
144
60
TMUs
24
48
ROPs
24
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
64 KB (per SM)
768 KB
L2 Cache
384 KB
-
-
-
Theoretical Performance
18.24 GPixel/s
Pixel Rate
4.320 GPixel/s
36.48 GTexel/s
Texture Rate
17.28 GTexel/s
-
-
-
1166 GFLOPS
FP32 (float)
414.7 GFLOPS
145.8 GFLOPS
FP64 (double)
34.56 GFLOPS
Board Design
365W
TDP
75W
750 W
Suggested PSU
250 W
3x DVI
1x mini-DisplayPort
Outputs
2x DVI
1x mini-HDMI 1.3a
2x 8-pin
Power Connectors
None
Graphics Processor
GF100
GPU Name
GF116
GF100-375-A3
GPU Variant
GF116-150-A1
Fermi
Architecture
Fermi 2.0
TSMC
Foundry
TSMC
40 nm
Process Size
40 nm
3.1 billion
Transistors
1.17 billion
529 mm²
Die Size
238 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
1.1
OpenCL
1.1
N/A
Vulkan
N/A
2.0
CUDA
2.1
5.1
Shader Model
5.1
