NVIDIA GeForce GT 640 vs NVIDIA GeForce GTX 680 Full Specs

Summary

384 Shaders 900MHz	1,536 Shaders 1.11GHz
2GB DDR328.5GB/s	2GB GDDR5192.3GB/s
Peak·FP32·FP16 691.2 GFLOPS	Peak·FP32·FP16 3.41 TFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 65W	TDP 195W
Power Connectors -	Power Connectors 2x 6-Pin

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

GeForce GT 640691.2 GFLOPSFP32

x1

GeForce GTX 6803.41 TFLOPSFP32

x4.93

Show Top Score

Theoretical Performance

Clock Speed900MHz UC·Boost·OC	Clock Speed1110MHz UC·Base·Boost·OC
Peak OPS 691.2 GFLOPSFP32	Peak OPS 3.41 TFLOPSFP32
FP32 691.2 GFLOPS	FP32 3.41 TFLOPS
FP64 28.8 GFLOPS	FP64 142.1 GFLOPS
Pixel Rate 14.4 GPixel/s	Pixel Rate 35.5 GPixel/s
Texture Rate 28.8 GTexel/s	Texture Rate 142.1 GTexel/s

Core Config

Shaders 384 Shaders	Shaders 1,536 Shaders
TMUs 32 TMUs	TMUs 128 TMUs
ROPs 16 ROPs	ROPs 32 ROPs
SMs 2 SMs	SMs 8 SMs

Clocks

Base Clock -	Base Clock 1.01GHz
Boost Clock 900MHz	Boost Clock 1.11GHz

Cache

L2 Cache 256KB shared

L2 Cache 512KB shared

Memory

2GB DDR3	2GB GDDR5
Memory Bus 128-bit	Memory Bus 256-bit
Memory Speed 1.8GT/s	Memory Speed 6GT/s
Memory Bandwidth 28.5GB/s	Memory Bandwidth 192.3GB/s
ECC No	ECC No

Power & Thermals

TDP 65W

TDP 195W

Video Output

Multi-Monitor 2

Multi-Monitor 3

Ports

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

Encoder

Encoder Model NVENC 1

Encoder Model NVENC 1

Decoder

Decoder Model NVDEC 1

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 256 mm (10.08") Depth 38 mm (1.5")
Cooling Open-Air 1x Fan	Cooling Blower 1x Fan
Power Connectors -	Power Connectors 2x 6-Pin

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 NVE4
Chip Variant -	Chip Variant GK104-200-KD-A2
Market Segment Desktop	Market Segment Desktop
Release Date Jun 5, 2012	Release Date Mar 22, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 28nm	Fabrication Node 28nm
Die Size 118mm²	Die Size 294mm²
Transistor Count 1.3 Billion	Transistor Count 3.5 Billion
Transistor Density 10.76 MTr/mm²	Transistor Density 12.04 MTr/mm²

Images

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