NVIDIA GeForce GT 640 GF116 vs NVIDIA GeForce GTX 660 GK104 Full Specs

Summary

144 Shaders 720MHz	1,152 Shaders 899MHz
2GB DDR342.8GB/s	2GB GDDR5139.2GB/s
Peak·FP32·FP16 414.7 GFLOPS	Peak·FP32·FP16 2.07 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 75W	TDP 130W
Power Connectors -	Power Connectors 1x 6-Pin

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

GeForce GT 640 GF116414.7 GFLOPSFP32

x1

GeForce GTX 660 GK1042.07 TFLOPSFP32

x4.99

Show Top Score

Theoretical Performance

Clock Speed720MHz UC·Boost·OC	Clock Speed899MHz UC·Base·Boost·OC
Peak OPS 414.7 GFLOPSFP32	Peak OPS 2.07 TFLOPSFP32
FP32 414.7 GFLOPS	FP32 2.07 TFLOPS
FP64 34.56 GFLOPS	FP64 86.3 GFLOPS
Pixel Rate 34.6 GPixel/s	Pixel Rate 21.6 GPixel/s
Texture Rate 34.6 GTexel/s	Texture Rate 86.3 GTexel/s

Core Config

Shaders 144 Shaders	Shaders 1,152 Shaders
TMUs 24 TMUs	TMUs 96 TMUs
ROPs 24 ROPs	ROPs 24 ROPs
SMs 3 SMs	SMs 6 SMs

Clocks

Base Clock -	Base Clock 824MHz
Boost Clock 720MHz	Boost Clock 899MHz
Shader Clock 1.44GHz	Shader Clock -

Cache

L2 Cache 384KB shared

L2 Cache 512KB shared

Memory

2GB DDR3	2GB GDDR5
Memory Bus 192-bit	Memory Bus 192-bit
Memory Speed 1.8GT/s	Memory Speed 5.8GT/s
Memory Bandwidth 42.8GB/s	Memory Bandwidth 139.2GB/s

Power & Thermals

TDP 75W

TDP 130W

Video Output

Multi-Monitor 2

Multi-Monitor 3

Ports

-	1x DisplayPort 1.2
-	1x HDMI 1.4
1x HDMI 1.3	-
-	1x DVI-D Dual-Link
1x DVI-I Dual-Link	1x DVI-I Dual-Link
1x VGA	-

Encoder

-	Encoder Model NVENC 1

Decoder

Decoder Model VP4

Decoder Model NVDEC 1

Card

Form Factor PCIe Card	Form Factor PCIe Card
PCIe 1.5-Slots	PCIe 2-Slots
Height 111 mm (4.37") Width 145 mm (5.71") Depth 30 mm (1.18")	Height 111 mm (4.37") Width 241 mm (9.49") Depth 38 mm (1.5")
Cooling Open-Air 1x Fan	Cooling Blower 1x Fan
Power Connectors -	Power Connectors 1x 6-Pin

Chip

Manufacturer NVIDIA	Manufacturer NVIDIA
Chip Designer NVIDIA	Chip Designer NVIDIA
Architecture Fermi	Architecture Kepler
Family GeForce 600	Family GeForce 600
Branding	Branding
Codename NVCF	Codename NVE4
Chip Variant -	Chip Variant GK104-200-KD-A2
Market Segment Desktop	Market Segment Desktop
Release Date Apr 24, 2012	Release Date Aug 22, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 40nm	Fabrication Node 28nm
Die Size 238mm²	Die Size 294mm²
Transistor Count 1.2 Billion	Transistor Count 3.5 Billion
Transistor Density 4.92 MTr/mm²	Transistor Density 12.04 MTr/mm²

Images

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Competitors

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