NVIDIA GeForce GT 755M vs NVIDIA GeForce GT 640M
We compared two Mobile platform GPUs: 2GB VRAM GeForce GT 755M and 2GB VRAM GeForce GT 640M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
NVIDIA GeForce GT 755M 's Advantages
Released 1 years and 3 months late
Larger VRAM bandwidth (86.40GB/s vs 28.80GB/s)
NVIDIA GeForce GT 640M 's Advantages
Lower TDP (32W vs 50W)
Score
Benchmark
FP32 (float)
GeForce GT 755M
+56%
0.753 TFLOPS
GeForce GT 640M
0.48 TFLOPS
3DMark Time Spy
GeForce GT 755M
+59%
534
GeForce GT 640M
334
3DMark Time Spy Extreme
GeForce GT 755M
+31%
198
GeForce GT 640M
151
Graphics Card
Jun 2013
Release Date
Mar 2012
GeForce 700M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
-
-
-
-
-
1350 MHz
Memory Clock
900 MHz
Memory
2GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
128bit
Memory Bus
128bit
86.40GB/s
Bandwidth
28.80GB/s
Render Config
-
-
-
-
-
-
384
Shading Units
384
32
TMUs
32
16
ROPs
16
-
-
-
-
-
-
16 KB (per SMX)
L1 Cache
16 KB (per SMX)
256 KB
L2 Cache
256 KB
-
-
-
Theoretical Performance
7.840 GPixel/s
Pixel Rate
5.000 GPixel/s
31.36 GTexel/s
Texture Rate
20.00 GTexel/s
-
-
-
752.6 GFLOPS
FP32 (float)
480.0 GFLOPS
31.36 GFLOPS
FP64 (double)
20.00 GFLOPS
Board Design
50W
TDP
32W
-
-
-
No outputs
Outputs
No outputs
-
-
-
Graphics Processor
GK107
GPU Name
GK107
GT 755M
GPU Variant
N13P-GS
Kepler
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.27 billion
Transistors
1.27 billion
118 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.1
Vulkan
1.1
3.0
CUDA
3.0
5.1
Shader Model
5.1
