ATI Radeon HD 3850 X3 vs NVIDIA GeForce 800A

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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	RV670	GF119
GPU variant	RV670 PRO (215-0708003)	—
Architecture	TeraScale	Fermi 2.0
Foundry	TSMC	TSMC
Manufacturing process	55 nm	40 nm
Number of transistors	666 million	292 million
Die size	192 mm²	79 mm²

Graphics Card

Release date	Never Released	—
Generation	Radeon R600	—
Production	End-of-life	—
Interface	PCIe 2.0 x16	—
Predecessor	Radeon R500 PCIe	—
Successor	Radeon R700	—

Clocks

GPU clock	669 MHz	475 MHz
Memory clock	850 MHz 1700 Mbps effective	900 MHz 1800 Mbps effective
Shader clock	—	950 MHz

Memory Configuration

Memory size	512 MB	1024 MB
Memory type	GDDR3	DDR3
Memory bus width	256 bit	64 bit
Bandwidth	54.40 GB/s	14.40 GB/s

Render Configuration

Shading units	320	48
TMUs	16	8
ROPs	16	4
Compute units	4	—
Cache L2	256 KB	128 KB
SM count	—	1
Cache L1	—	64 KB (per SM)

Performance

Pixel rate	10.70 GPixel/s	950.0 MPixel/s
Texture rate	10.70 GTexel/s	3.800 GTexel/s
FP32 (float) performance	428.2 GFLOPS	91.20 GFLOPS
FP64 (double) performance	—	7.600 GFLOPS (1:12)

Dimensions & Outputs

Slot width	Dual-slot	—
Length	292 mm 11.5 inches	—
TDP	145 W	15 W
Suggested PSU	300 W	—
Outputs	4x DVI	No outputs
Power connectors	1x 8-pin	—

API Support & Features

DirectX	10.1 (10_1)	12 (11_0)
OpenGL	3.3 (full) 4.0 (partial)	4.6
OpenCL	—	1.1
Vulkan	—	—
Shader model	4.1	5.1
CUDA	—	2.1

Other Features

Mobile graphics

Release date	—	Mar 17th, 2014
Generation	—	GeForce 800A
Production	—	End-of-life
Interface	—	PCIe 2.0 x16
Predecessor	—	GeForce 700A
Successor	—	GeForce 900A

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