Authour: James Prior
Editor: Charles Oliver
Date: November 18th, 2009
As we saw in our HD5770 article, the Juniper architecture features the same TeraScale 2 engine introduced in the Cypress core. The HD5750 features one less SIMD unit than it's big brother the HD5770, and lower core and memory clocks. The HD5750 has 720 Stream Processors and 36 Texture Units, but still features the full 16 ROP's and full 128-bit memory interface of the top Juniper architecture.
The Sapphire HD5750 Vapor-X edition is overclocked in the box, offering a 10Mhz bump on the engine and memory clocks. It also features Sapphire's Vapor chamber technology, originated from the Microloops Vapor Chamber technology and first introduced with the Sapphire HD3870.
Vapor Chamber Technology
Vapor Chamber Technology is based on the same principles as heatpipe technology. A liquid coolant is vaporised at a hot surface, the resulting vapor is condensed at a cold surface then the liquid is returned to the hot surface. The recirculation process is controlled by a wick system. SAPPHIRE Vapor-X flattens the whole system into a slim chamber - which in the graphics application is mounted in contact with the surface of the graphics chip. Actually, the coolant is water - but because the chamber is evacuated to a very low pressure, the vaporisation process occurs at a much lower temperature than normal boiling point. The complex wick arrangement inside the module controls the flow of water and water vapor so that the system can be used in any orientation. - Sapphire
In addition to the superb cooling fitted to the HD5750 there is a nice illuminated Sapphire logo on the side of the card, when in operation. This LED emits a Sapphire blue glow to softly illuminate your case internals as you dominate your games, but might be less desirable in a HTPC setting. The card itself is small, the same length as the mATX board used for some of our testing, albeit double-height requiring two PCI backplanes.
Also included with the Sapphire HD5750 Vapor-X edition is a coupon for Codemaster's upcoming DirectX 11 title, DIRT 2, and Arcosoft Media's IM HD software. You also receive a DVI to VGA adapter, a Crossfire bridge, and a 4pin molex power to 2x3pin PCIe power adapter. You also get a driver CD and Sapphire case badge.
The HD5750 supports Eyefinity with the use of the DisplayPort output and either both DVI outputs or one DVI and the HDMI output. Using the DisplayPort output without a DisplayPort capable display requires the use of an active DisplayPort adapter, which adds the necessary timing signals needed for other output connections like DVI or HDMI. If you only use two outputs, the onboard display engine will send the timing signals to allow a cheap passive Display Port to DVI adapter to be used. I can't think of a reason you'd need to do that, but hey - now you know.
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