ATI Radeon HD 3870 X2 vs NVIDIA GeForce GT 625M

Table of Contents

Graphics Processor

GPU model R680 GF117
GPU variant R680 XT (215-0708017) N13M-GS-B-A2
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 Jan 26th, 2008
Generation Radeon R600
Production End-of-life
Launch price 449 USD
Interface PCIe 2.0 x16
Reviews 72 in our database
Predecessor Radeon R500 PCIe
Successor Radeon R700

Clocks

GPU clock 825 MHz 625 MHz
Memory clock 901 MHz 1802 Mbps effective 900 MHz 1800 Mbps effective
Shader clock 1250 MHz

Memory Configuration

Memory size 512 MB 2 GB
Memory type GDDR3 DDR3
Memory bus width 256 bit 64 bit
Bandwidth 57.66 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 13.20 GPixel/s 2.500 GPixel/s
Texture rate 13.20 GTexel/s 10.00 GTexel/s
FP32 (float) performance 528.0 GFLOPS 240.0 GFLOPS
FP64 (double) performance 105.6 GFLOPS (1:5) 20.00 GFLOPS (1:12)

Dimensions & Outputs

Slot width Dual-slot
Length 267 mm 10.5 inches
Width 113 mm 4.4 inches
Height 39 mm 1.5 inches
TDP 165 W 15 W
Suggested PSU 450 W
Outputs 2x DVI1x S-Video No outputs
Power connectors 1x 6-pin + 1x 8-pin
Board number 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 Oct 1st, 2012
Generation GeForce 600M
Production End-of-life
Interface PCIe 2.0 x16
Predecessor GeForce 500M
Successor GeForce 700M

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