Sapphire presents the Radeon HD5850 'Toxic', an overclocked version of the HD5850 card with alternative cooling. The HD5850 Toxic uses a large dualslot heatsink with 'vapor chamber' technology and heatpipes. This vapor chamber cooling was already used in some of Sapphire's Radeon HD4800 cards and AMD uses the technology in the reference cooler of the dual-GPU Radeon HD5970 card. The vapor chamber functions as a heatpipe, whilst covering a much larger surface.
This allows the videochip's heat to be spread throughout the heatsink more evenly, increasing the card's overclocking potential. Sapphire claims that the Toxic HD5850 is up to 10dB faster than the HD5850's reference cooler, whilst keeping the GPU up to 15 degrees Celsius cooler. This advantage allowed Sapphire to overclock the card: rather than 725 MHz, the core is clocked at 765 MHz. The 1 GB of GDDR5 memory is also overclocked, from 4000 MHz to 4500 MHz effectively.
The Radeon HD5850 features 1440 shaderunits and standard HD5000 features such as DirectX 11 support, EyeFinity and CrossFireX. Sapphire uses the reference video outputs on its card, namely two DVI ports, an HDMI and a DisplayPort connector. Sapphire's new Toxic HD5850 can be pre-ordered at a price of 309 euro.
Source:www.hardware.info
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