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ATI Radeon 3100 IGP

The Radeon 3100 IGP was a mobile n integrated graphics solution by ATI, launched in August 2008. Built on the 55 nm process, and based on the RS780M graphics processor, the card supports DirectX 10.0. It features 40 shading units, 4 texture mapping units and 4 ROPs. The GPU is operating at a frequency of 344 MHz.
Its power draw is not exactly known. Radeon 3100 IGP is connected to the rest of the system using a PCIe 1.0 x16 interface.

Graphics Processor

GPU Name: RS780M
Process Size: 55 nm
Transistors: 205 million
Die Size: 64 mm²

Graphics Card

Released: Aug 15th, 2008
Production Status: End-of-life
Bus Interface: PCIe 1.0 x16

Clock Speeds

GPU Clock: 344 MHz
Memory Clock: System Shared


Memory Size: System Shared
Memory Type: System Shared
Memory Bus: System Shared
Bandwidth: System Dependent

Render Config

Shading Units: 40
TMUs: 4
ROPs: 4
Compute Units: 2
Pixel Rate: 1.38 GPixel/s
Texture Rate: 1.38 GTexel/s
Floating-point performance: 27.52 GFLOPS

Board Design

Slot Width: IGP
TDP: unknown

Graphics Features

DirectX: 10.0
OpenGL: 3.3
OpenCL: n/a
Shader Model: 4.0


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RS780M GPU Notes

RS780M is a high-grade northbridge that goes into making the AMD 790 GX chipset. It features the Radeon HD 3300 IGP. Apart from shared memory using ATI HyperMemory technology, the IGP features a DDR3 sideport. Motherboard vendors usually embed 128 MB of DDR3 memory onboard.