ATI Radeon HD 3850 vs NVIDIA GeForce GT 420M

Table of Contents

Graphics Processor

GPU model RV670 GF108
GPU variant RV670 PRO (215-0708003) N11P-GE-A1
Architecture TeraScale Fermi
Foundry TSMC TSMC
Manufacturing process 55 nm 40 nm
Number of transistors 666 million 585 million
Die size 192 mm² 116 mm²

Graphics Card

Release date Nov 19th, 2007
Generation Radeon R600
Production End-of-life
Launch price 179 USD
Interface PCIe 2.0 x16
Reviews 71 in our database
Predecessor Radeon R500 PCIe
Successor Radeon R700

Clocks

GPU clock 668 MHz 500 MHz
Memory clock 830 MHz 1660 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 256 bit 128 bit
Bandwidth 53.12 GB/s 25.60 GB/s

Render Configuration

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

Performance

Pixel rate 10.69 GPixel/s 2.000 GPixel/s
Texture rate 10.69 GTexel/s 8.000 GTexel/s
FP32 (float) performance 427.5 GFLOPS 192.0 GFLOPS
FP64 (double) performance 85.50 GFLOPS (1:5) 16.00 GFLOPS (1:12)

Dimensions & Outputs

Slot width Single-slot
Length 208 mm 8.2 inches
TDP 75 W 23 W
Suggested PSU 250 W
Outputs 2x DVI1x S-Video No outputs
Power connectors 1x 6-pin
Board number B340, B400

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

Compare

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