AMD Radeon HD 8870 OEM vs NVIDIA GeForce GT 640M LE

Table of Contents

Graphics Processor

GPU model Pitcairn GF108
GPU variant Pitcairn XT (215-0828047)
Architecture GCN 1.0 Fermi
Foundry TSMC TSMC
Manufacturing process 28 nm 40 nm
Number of transistors 2,800 million 585 million
Die size 212 mm² 116 mm²

Graphics Card

Release date Jan 8th, 2013
Generation Sea Islands
Production End-of-life
Interface PCIe 3.0 x16
Predecessor Southern Islands
Successor Volcanic Islands

Clocks

GPU clock 1000 MHz 753 MHz
Memory clock 1200 MHz 4.8 Gbps effective 785 MHz 3.1 Gbps effective
Shader clock 1505 MHz

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 128 bit
Bandwidth 153.6 GB/s 50.24 GB/s

Render Configuration

Shading units 1280 96
TMUs 80 16
ROPs 32 4
Compute units 20
Cache L1 16 KB (per CU) 64 KB (per SM)
Cache L2 512 KB 256 KB
SM count 2

Performance

Pixel rate 32.00 GPixel/s 3.012 GPixel/s
Texture rate 80.00 GTexel/s 12.05 GTexel/s
FP32 (float) performance 2.560 TFLOPS 289.0 GFLOPS
FP64 (double) performance 160.0 GFLOPS (1:16) 24.08 GFLOPS (1:12)

Dimensions & Outputs

Slot width Dual-slot
Length 241 mm 9.5 inches
TDP 175 W 32 W
Suggested PSU 450 W
Outputs 1x DVI1x HDMI2x mini-DisplayPort No outputs
Power connectors 2x 6-pin
Board number C401

API Support & Features

DirectX 12 (11_1) 12 (11_0)
OpenGL 4.6 4.6
OpenCL 1.2 1.1
Vulkan 1.2
Shader model 5.1 5.1
CUDA 2.1

Other Features

Mobile graphics

Release date May 4th, 2012
Generation GeForce 600M
Production End-of-life
Interface PCIe 2.0 x16
Reviews 2 in our database
Predecessor GeForce 500M
Successor GeForce 700M

Compare

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