ATI Mobility Radeon HD 3870 X2 vs NVIDIA GeForce GT 630M

Graphics Processor

GPU model M88 GF108
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
GPU variant N12P-GS-A1

Mobile graphics

Release date Sep 1st, 2008 Mar 22nd, 2012
Generation M8x (Mobility HD 3800) GeForce 600M
Production End-of-life End-of-life
Interface PCIe 2.0 x16 MXM-A (3.0)
Reviews 2 in our database
Predecessor M7x GeForce 500M
Successor M9x GeForce 700M

Clocks

GPU clock 660 MHz 660 MHz
Memory clock 850 MHz 1700 Mbps effective 900 MHz 1800 Mbps effective
Shader clock 1320 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 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 10.56 GPixel/s 2.640 GPixel/s
Texture rate 10.56 GTexel/s 10.56 GTexel/s
FP32 (float) performance 422.4 GFLOPS 253.4 GFLOPS
FP64 (double) performance 84.48 GFLOPS (1:5) 21.12 GFLOPS (1:12)

Dimensions & Outputs

TDP 110 W 33 W
Outputs No outputs No outputs
Slot width MXM Module

API Support & Features

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

Other Features

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