As an early production model this Radeon HD 5770 is not your typical highly modified HIS graphics card. Rather, it closely follows the reference design and specifications, with pretty much the only difference being a HIS sticker on the fan.
The package bundle HIS has prepared for their Radeon HD 5770 card however is more generous than we have come to expect from graphics card manufacturers as of late. Besides the card itself, inside the box we found a CrossFireX bridge adapter, two 6-pin power cable adapters (in case your PSU does not have them), a DVI-VGA adapter, the usual quick reference manuals and a game coupon for DiRT 2. It’s expected to be released sometime in December and will be the first shipping DirectX 11 title.
While the Radeon HD 5870 measures 28cm long and the Radeon HD 5850 is 24cm long, the Radon HD 5770 is just 21cm long. The Radon HD 5770 measures the same length as existing Radeon HD 4850 and 4770 graphics cards. This means that this new graphics card will fit in any case that can support a mATX motherboard.
Cooling the “Juniper XT” GPU is a fairly large aluminum heatsink, made up of 32 fins measuring 7.5cm long, 6.0cm wide, and 2.5cm tall. Connected to the base of this heatsink are two copper heatpipes which help improve efficiency. Finally, there is a 65x20mm blower fan that draws air in from within the case and pushes it out through the rear of the graphics card.
The Radeon HD 5770 features a remarkably low 18 watt idle consumption level, making it one of the most efficient graphics cards available today. When we began to game, the fan kicked in and made some noise – as you would expect. Noise levels were comparable to those of the Radeon HD 4770 or GeForce GTS 250 graphics cards, however nothing unusual here.
The use of a 40nm design has allowed ATI to be quite aggressive with the GPU core speed, clocking it at 850MHz. The GPU configuration features 800 SPUs, 40 TAUs (Texture Address Units) and 16 ROPs (Rasterization Operator Units). Interestingly this is the exact core configuration of the Radeon HD 4870 and 4890 graphics cards.
GDDR5 memory works at a frequency of 1200MHz on this particular model, matching the memory speed of the Radeon HD 5870. There’s 1GB of memory in total spread across eight chips, which are located on the front and back side of the graphics card.
The Radeon HD 5770 can consume up to 108 watts of power when pushed hard. In order to feed the graphics card enough power, AMD has included a single 6-pin PCI Express power connector. This is the same configuration that you will find on the Radeon HD 4770.
As with all modern Radeons, in the standard position you’ll find a pair of Crossfire connectors for bridging two or more cards together. The only other connectors can be found on the I/O panel. Our AMD card featured two dual DVI connectors, a HDMI, and Display Port connection. It is worth noting that all Radeon HD 5770 graphics cards can support a maximum resolution of 2560×1600 on not one but rather three monitors (a feature ATI calls Eyefinity).
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