Home GPU Comparison NVIDIA GeForce GT 555M vs NVIDIA GeForce GT 645M

NVIDIA GeForce GT 555M vs NVIDIA GeForce GT 645M

We compared two Mobile platform GPUs: 2GB VRAM GeForce GT 555M and 2GB VRAM GeForce GT 645M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

NVIDIA GeForce GT 645M 's Advantages
Released 7 months late
240 additional rendering cores
Lower TDP (32W vs 35W)

Score

Benchmark

FP32 (float)
GeForce GT 555M
0.389 TFLOPS
GeForce GT 645M +39%
0.544 TFLOPS
VS

Graphics Card

Mar 2012
Release Date
Oct 2012
GeForce 500M
Generation
GeForce 600M
Mobile
Type
Mobile
PCIe 2.0 x16
Bus Interface
PCIe 3.0 x16

Clock Speeds

-
-
-
-
-
-
900 MHz
Memory Clock
900 MHz

Memory

2GB
Memory Size
2GB
DDR3
Memory Type
DDR3
128bit
Memory Bus
128bit
28.80GB/s
Bandwidth
28.80GB/s

Render Config

-
-
-
2
SM Count
-
144
Shading Units
384
24
TMUs
32
16
ROPs
16
-
-
-
-
-
-
64 KB (per SM)
L1 Cache
16 KB (per SMX)
256 KB
L2 Cache
256 KB
-
-
-

Theoretical Performance

2.700 GPixel/s
Pixel Rate
5.672 GPixel/s
16.20 GTexel/s
Texture Rate
22.69 GTexel/s
-
-
-
388.8 GFLOPS
FP32 (float)
544.5 GFLOPS
32.40 GFLOPS
FP64 (double)
22.69 GFLOPS

Board Design

35W
TDP
32W
-
-
-
No outputs
Outputs
No outputs
-
-
-

Graphics Processor

GF116
GPU Name
GK107
N12E-GE2-A1
GPU Variant
N13P-GS
Fermi 2.0
Architecture
Kepler
TSMC
Foundry
TSMC
40 nm
Process Size
28 nm
1.17 billion
Transistors
1.27 billion
238 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
2.1
CUDA
3.0
5.1
Shader Model
5.1

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