NVIDIA GeForce GT 640M Mac vs NVIDIA GeForce GTX 660M Full Specs

Summary

384 Shaders 625MHz	384 Shaders 835MHz
524MB GDDR564GB/s	2GB GDDR580GB/s
Peak·FP32·FP16 480 GFLOPS	Peak·FP32·FP16 641.3 GFLOPS
Form Factor Soldered	Form Factor Soldered
TDP 32W	TDP 50W

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

GeForce GT 640M Mac480 GFLOPSFP32

x1

GeForce GTX 660M641.3 GFLOPSFP32

x1.34

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Theoretical Performance

Clock Speed625MHz UC·Boost·OC	Clock Speed835MHz UC·Boost·OC
Peak OPS 480 GFLOPSFP32	Peak OPS 641.3 GFLOPSFP32
FP32 480 GFLOPS	FP32 641.3 GFLOPS
FP64 20 GFLOPS	FP64 26.72 GFLOPS
Pixel Rate 10 GPixel/s	Pixel Rate 13.4 GPixel/s
Texture Rate 20 GTexel/s	Texture Rate 26.7 GTexel/s

Core Config

Shaders 384 Shaders	Shaders 384 Shaders
TMUs 32 TMUs	TMUs 32 TMUs
ROPs 16 ROPs	ROPs 16 ROPs
SMs 2 SMs	SMs 2 SMs

Clocks

Boost Clock 625MHz

Boost Clock 835MHz

Cache

L2 Cache 256KB shared

L2 Cache 256KB shared

Memory

524MB GDDR5	2GB GDDR5
Memory Bus 128-bit	Memory Bus 128-bit
Memory Speed 4GT/s	Memory Speed 5GT/s
Memory Bandwidth 64GB/s	Memory Bandwidth 80GB/s

Power & Thermals

TDP 32W

TDP 50W

Video Output

Multi-Monitor 3

Multi-Monitor 2

Encoder

Encoder Model NVENC 1

Encoder Model NVENC 1

Decoder

Decoder Model NVDEC 1

Decoder Model NVDEC 1

Card

Form Factor Soldered

Form Factor Soldered

Chip

Manufacturer NVIDIA	Manufacturer NVIDIA
Chip Designer NVIDIA	Chip Designer NVIDIA
Architecture Kepler	Architecture Kepler
Family GeForce 600	Family GeForce 600
Branding	Branding
Codename NVE7	Codename NVE7
Market Segment Laptop	Market Segment Laptop
Release Date Mar 22, 2012	Release Date Mar 22, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 28nm	Fabrication Node 28nm
Die Size 118mm²	Die Size 118mm²
Transistor Count 1.3 Billion	Transistor Count 1.3 Billion
Transistor Density 10.76 MTr/mm²	Transistor Density 10.76 MTr/mm²

Images

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Used In

Laptops -	Laptops Blade 17(Late 2012)
All-in-Ones iMac 21.5(Late 2012)	All-in-Ones -

Competitors

NVIDIAGeForce GT 640M Mac vs GPU AMDRadeon 860M 3000MHz NVIDIAGeForce GT 640M Mac vs GPU NVIDIAGeForce RTX 5050 Laptop 80W NVIDIAGeForce GT 640M Mac vs GPU NVIDIAGeForce RTX 5050 Laptop 60W Show 12 more

NVIDIAGeForce GTX 660M vs GPU AMDRadeon 860M 3000MHz NVIDIAGeForce GTX 660M vs GPU NVIDIAGeForce RTX 5050 Laptop 80W NVIDIAGeForce GTX 660M vs GPU NVIDIAGeForce RTX 5050 Laptop 60W Show 12 more