ATI Radeon HD 4670 X2 vs NVIDIA GeForce GT 420M

Edit	ATI Radeon HD 4670 X2 Check Price	NVIDIA GeForce GT 420M Check Price

Table of Contents

Graphics Processor
Graphics Card
Clocks
Memory Configuration
Render Configuration
Performance
Dimensions & Outputs
API Support & Features
Other Features
Mobile graphics

Graphics Processor

GPU model	RV730	GF108
GPU variant	RV730 XT (215-0719047)	N11P-GE-A1
Architecture	TeraScale	Fermi
Foundry	TSMC	TSMC
Manufacturing process	55 nm	40 nm
Number of transistors	514 million	585 million
Die size	146 mm²	116 mm²

Graphics Card

Release date	Sep 10th, 2008	—
Generation	Radeon R700	—
Production	End-of-life	—
Interface	PCIe 2.0 x16	—
Reviews	49 in our database	—
Predecessor	Radeon R600	—
Successor	Evergreen	—

Clocks

GPU clock	750 MHz	500 MHz
Memory clock	700 MHz 1400 Mbps effective	800 MHz 1600 Mbps effective
Shader clock	—	1000 MHz

Memory Configuration

Memory size	512 MB	512 MB
Memory type	GDDR3	DDR3
Memory bus width	128 bit	128 bit
Bandwidth	22.40 GB/s	25.60 GB/s

Render Configuration

Shading units	320	96
TMUs	32	16
ROPs	8	4
Compute units	4	—
Cache L1	16 KB (per CU)	64 KB (per SM)
Cache L2	128 KB	256 KB
SM count	—	2

Performance

Pixel rate	6.000 GPixel/s	2.000 GPixel/s
Texture rate	24.00 GTexel/s	8.000 GTexel/s
FP32 (float) performance	480.0 GFLOPS	192.0 GFLOPS
FP64 (double) performance	—	16.00 GFLOPS (1:12)

Dimensions & Outputs

Slot width	Dual-slot	—
TDP	118 W	23 W
Suggested PSU	300 W	—
Outputs	4x DVI	No outputs
Power connectors	1x 6-pin	—

API Support & Features

DirectX	10.1 (10_1)	12 (11_0)
OpenGL	3.3	4.6
OpenCL	1.1	1.1
Vulkan	—	—
Shader model	4.1	5.1
CUDA	—	2.1

Other Features

Mobile graphics

Release date	—	Sep 3rd, 2010
Generation	—	GeForce 400M
Production	—	End-of-life
Interface	—	PCIe 2.0 x16
Predecessor	—	GeForce 300M
Successor	—	GeForce 500M

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