NVIDIA GeForce GT 545 1GB vs NVIDIA GeForce GT 640 1GB Full Specs

Summary

144 Shaders 870MHz	384 Shaders 797MHz
1GB GDDR564GB/s	1GB DDR328.5GB/s
Peak·FP32·FP16 501.1 GFLOPS	Peak·FP32·FP16 612.1 GFLOPS
Form Factor PCIe Card	Form Factor PCIe Card
TDP 105W	TDP 50W

Highlights

Peak OPS

Peak OPS FP32 FP64 Memory Bandwidth TDP

GeForce GT 545 1GB501.1 GFLOPSFP32

x1

GeForce GT 640 1GB612.1 GFLOPSFP32

x1.22

Show Top Score

Theoretical Performance

Clock Speed870MHz UC·Boost·OC	Clock Speed797MHz UC·Boost·OC
Peak OPS 501.1 GFLOPSFP32	Peak OPS 612.1 GFLOPSFP32
FP32 501.1 GFLOPS	FP32 612.1 GFLOPS
FP64 41.76 GFLOPS	FP64 25.5 GFLOPS
Pixel Rate 27.8 GPixel/s	Pixel Rate 12.8 GPixel/s
Texture Rate 41.8 GTexel/s	Texture Rate 25.5 GTexel/s

Core Config

Shaders 144 Shaders	Shaders 384 Shaders
TMUs 24 TMUs	TMUs 32 TMUs
ROPs 16 ROPs	ROPs 16 ROPs
SMs 3 SMs	SMs 2 SMs

Clocks

Boost Clock 870MHz	Boost Clock 797MHz
Shader Clock 1.74GHz	Shader Clock -

Cache

L2 Cache 384KB shared

L2 Cache 256KB shared

Memory

1GB GDDR5	1GB DDR3
Memory Bus 128-bit	Memory Bus 128-bit
Memory Speed 4GT/s	Memory Speed 1.8GT/s
Memory Bandwidth 64GB/s	Memory Bandwidth 28.5GB/s
ECC No	ECC No

Power & Thermals

TDP 105W

TDP 50W

Video Output

Multi-Monitor 2

Multi-Monitor 2

Ports

-	1x HDMI 1.4
1x HDMI 1.3	-
1x DVI-I Dual-Link	1x DVI-I Dual-Link
1x VGA	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-Slots	PCIe 1.5-Slots
Height 111 mm (4.37") Width 160 mm (6.3") Depth 20 mm (0.79")	Height 111 mm (4.37") Width 145 mm (5.71") Depth 30 mm (1.18")
Cooling Blower 1x Fan	Cooling Open-Air 1x Fan

Chip

Manufacturer NVIDIA	Manufacturer NVIDIA
Chip Designer NVIDIA	Chip Designer NVIDIA
Architecture Fermi	Architecture Kepler
Family GeForce 500	Family GeForce 600
Branding	Branding
Codename NVCF	Codename NVE7
Market Segment Desktop	Market Segment Desktop
Release Date May 14, 2011	Release Date Apr 24, 2012

Fabrication

Foundry TSMC	Foundry TSMC
Fabrication Node 40nm	Fabrication Node 28nm
Die Size 238mm²	Die Size 118mm²
Transistor Count 1.2 Billion	Transistor Count 1.3 Billion
Transistor Density 4.92 MTr/mm²	Transistor Density 10.76 MTr/mm²

Images

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Competitors

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