ATI Radeon HD 3870 AGP vs NVIDIA GeForce GT 635M

Table of Contents

Graphics Processor

GPU model RV670 GF108
GPU variant RV670 XT (215-0708005)
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 Never Released
Generation Radeon R600
Production End-of-life
Interface AGP 8x
Reviews 80 in our database
Predecessor Radeon R500 PCIe
Successor Radeon R700

Clocks

GPU clock 777 MHz 660 MHz
Memory clock 1126 MHz 2.3 Gbps effective 900 MHz 1800 Mbps effective
Shader clock 1320 MHz

Memory Configuration

Memory size 512 MB 1024 MB
Memory type GDDR4 DDR3
Memory bus width 256 bit 64 bit
Bandwidth 72.06 GB/s 14.40 GB/s

Render Configuration

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

Performance

Pixel rate 12.43 GPixel/s 2.640 GPixel/s
Texture rate 12.43 GTexel/s 10.56 GTexel/s
FP32 (float) performance 497.3 GFLOPS 253.4 GFLOPS
FP64 (double) performance 99.46 GFLOPS (1:5) 21.12 GFLOPS (1:12)

Dimensions & Outputs

Slot width Dual-slot MXM Module
Length 241 mm 9.5 inches
TDP 106 W 33 W
Suggested PSU 300 W
Outputs 2x DVI1x S-Video 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 22nd, 2012
Generation GeForce 600M
Production End-of-life
Interface MXM-A (3.0)
Predecessor GeForce 500M
Successor GeForce 700M

Compare

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