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ATI Mobility Radeon HD 3850 X2

The ATI Mobility Radeon HD 3850 X2 is a notebook graphics solution by AMD that consists of two Mobility Radeon HD 3850 chips in crossfire combination. Each of the two GPUs render alternating frames (called AFR) for an overall better performance than a single Mobility Radeon HD 3850. Still, the performance advantage varies from game to game depending on driver support.

According to AMD, the performance of the Mobility Radeon HD 3850 X2 should be similar to a GeForce 8800M GTX SLI setup. In our tests, the AMD solution showed better 3DMark results but had slower framerates in Bioshock and Crysis compared to the Nvidia solution. Regardless, demanding games of 2007 like Crysis (27 fps  from AMD versus 36 fps from Nvidia) and Bioshock (65 fps versus 75 fps) should be playable in medium to high settings.

The features of the X2 are similar to that of a single HD 3850, including Avivo HD  for decoding videos (MPEG-2, VC-1, and H.264). The current consumption should be about twice that of a single Mobility HD 3850 card, meaning only larger laptops with powerful cooling solutions can accommodate the Mobility HD 3850 X2.

CodenameM88 CF
ArchitectureRV6xx
Pipelines640 - unified
Core Speed580 MHz
Memory Speed750 MHz
Memory Bus Width256 Bit
Memory TypeGDDR3
Shared Memoryno
APIDirectX 10.1, Shader 4.1
Power Consumption110 Watt
Transistor Count1.3 Billion
technology55 nm
FeaturesPowerplay 7.0, Avivo-HD, PCI-E 2.0, CrossfireX, 2 Dual-Link fähige HDCP DVI Ausgänge möglich, Display Port nur mit ext. Transmitter
Notebook Sizelarge
Date of Announcement05.06.2008
Link to Manufacturer Pagehttp://ati.amd.com/products/mobilityrade...

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Class 1

Class 2

Radeon PRO W6600M *

Class 3

UHD Graphics 770

Class 4

Class 5

* Approximate position of the graphics adapter

Klaus Hinum (Update: 2016-01-26)