NVIDIA GeForce GTX 860M vs NVIDIA GeForce GT 645M
We compared two Mobile platform GPUs: 4GB VRAM GeForce GTX 860M 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 GTX 860M 's Advantages
Released 1 years and 3 months late
Boost Clock1085MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (80.19GB/s vs 28.80GB/s)
256 additional rendering cores
NVIDIA GeForce GT 645M 's Advantages
Lower TDP (32W vs 75W)
Score
Benchmark
FP32 (float)
GeForce GTX 860M
+155%
1.389 TFLOPS
GeForce GT 645M
0.544 TFLOPS
3DMark Time Spy
GeForce GTX 860M
+220%
1149
GeForce GT 645M
358
Graphics Card
Jan 2014
Release Date
Oct 2012
GeForce 800M
Generation
GeForce 600M
Mobile
Type
Mobile
MXM-B (3.0)
Bus Interface
PCIe 3.0 x16
Clock Speeds
1020 MHz
Base Clock
-
1085 MHz
Boost Clock
-
1253 MHz
Memory Clock
900 MHz
Memory
4GB
Memory Size
2GB
GDDR5
Memory Type
DDR3
128bit
Memory Bus
128bit
80.19GB/s
Bandwidth
28.80GB/s
Render Config
-
-
-
-
-
-
640
Shading Units
384
40
TMUs
32
16
ROPs
16
-
-
-
-
-
-
64 KB (per SMM)
L1 Cache
16 KB (per SMX)
2 MB
L2 Cache
256 KB
-
-
-
Theoretical Performance
17.36 GPixel/s
Pixel Rate
5.672 GPixel/s
43.40 GTexel/s
Texture Rate
22.69 GTexel/s
-
-
-
1389 GFLOPS
FP32 (float)
544.5 GFLOPS
43.40 GFLOPS
FP64 (double)
22.69 GFLOPS
Board Design
75W
TDP
32W
-
-
-
No outputs
Outputs
No outputs
None
Power Connectors
-
Graphics Processor
GM107
GPU Name
GK107
N15P-GX-A1
GPU Variant
N13P-GS
Maxwell
Architecture
Kepler
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
1.87 billion
Transistors
1.27 billion
148 mm²
Die Size
118 mm²
Graphics Features
12 (11_0)
DirectX
12 (11_0)
4.6
OpenGL
4.6
3.0
OpenCL
3.0
1.3
Vulkan
1.1
5.0
CUDA
3.0
5.1
Shader Model
5.1
