ATI Radeon HD 3850 X2 vs NVIDIA GeForce 620M

Table of Contents

Graphics Processor

GPU model RV670 GF117
GPU variant RV670 PRO (215-0708003) N13P-GLP
Architecture TeraScale Fermi 2.0
Foundry TSMC TSMC
Manufacturing process 55 nm 28 nm
Number of transistors 666 million 585 million
Die size 192 mm² 116 mm²

Graphics Card

Release date Apr 4th, 2008
Generation Radeon R600
Production End-of-life
Launch price 349 USD
Interface PCIe 2.0 x16
Reviews 1 in our database
Predecessor Radeon R500 PCIe
Successor Radeon R700

Clocks

GPU clock 669 MHz 625 MHz
Memory clock 828 MHz 1656 Mbps effective 900 MHz 1800 Mbps effective
Shader clock 1250 MHz

Memory Configuration

Memory size 512 MB 1024 MB
Memory type GDDR3 DDR3
Memory bus width 256 bit 64 bit
Bandwidth 52.99 GB/s 14.40 GB/s

Render Configuration

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

Performance

Pixel rate 10.70 GPixel/s 2.500 GPixel/s
Texture rate 10.70 GTexel/s 10.00 GTexel/s
FP32 (float) performance 428.2 GFLOPS 240.0 GFLOPS
FP64 (double) performance 85.63 GFLOPS (1:5) 20.00 GFLOPS (1:12)

Dimensions & Outputs

Slot width Dual-slot
Length 267 mm 10.5 inches
TDP 140 W 15 W
Suggested PSU 300 W
Outputs 2x DVI1x S-Video No outputs

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 22nd, 2012
Generation GeForce 600M
Production End-of-life
Interface PCIe 2.0 x16
Predecessor GeForce 500M
Successor GeForce 700M

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