NVIDIA GeForce GT 640 OEM Rebrand vs NVIDIA GeForce G100 OEM
We compared two Desktop platform GPUs: 1536MB VRAM GeForce GT 640 OEM Rebrand and 256MB VRAM GeForce G100 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 640 OEM Rebrand 's Advantages
Released 3 years and 1 months late
More VRAM (1536GB vs 256GB)
Larger VRAM bandwidth (38.40GB/s vs 6.400GB/s)
136 additional rendering cores
NVIDIA GeForce G100 OEM 's Advantages
Lower TDP (35W vs 75W)
Score
Benchmark
FP32 (float)
GeForce GT 640 OEM Rebrand
+1876%
0.415 TFLOPS
GeForce G100 OEM
0.021 TFLOPS
Graphics Card
Apr 2012
Release Date
Mar 2009
GeForce 600
Generation
GeForce 100
Desktop
Type
Desktop
PCIe 2.0 x16
Bus Interface
PCIe 2.0 x16
Clock Speeds
-
-
-
-
-
-
800 MHz
Memory Clock
400 MHz
Memory
1536MB
Memory Size
256MB
DDR3
Memory Type
DDR2
192bit
Memory Bus
64bit
38.40GB/s
Bandwidth
6.400GB/s
Render Config
-
-
-
3
SM Count
1
144
Shading Units
8
24
TMUs
4
24
ROPs
4
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
-
384 KB
L2 Cache
16 KB
-
-
-
Theoretical Performance
4.320 GPixel/s
Pixel Rate
2.160 GPixel/s
17.28 GTexel/s
Texture Rate
2.160 GTexel/s
-
-
-
414.7 GFLOPS
FP32 (float)
20.80 GFLOPS
34.56 GFLOPS
FP64 (double)
-
Board Design
75W
TDP
35W
250 W
Suggested PSU
200 W
2x DVI
1x mini-HDMI 1.3a
Outputs
1x DVI
1x S-Video
None
Power Connectors
None
Graphics Processor
GF116
GPU Name
G98
GF116-150-A1
GPU Variant
G98-309-U2
Fermi 2.0
Architecture
Tesla
TSMC
Foundry
TSMC
40 nm
Process Size
65 nm
1.17 billion
Transistors
0.21 billion
238 mm²
Die Size
86 mm²
Graphics Features
12 (11_0)
DirectX
11.1 (10_0)
4.6
OpenGL
3.3
1.1
OpenCL
1.1
N/A
Vulkan
N/A
2.1
CUDA
1.1
5.1
Shader Model
4.0
