AMD Radeon HD 5750/5770
In advance of today's launch, we had received engineering samples of both the Radeon HD 5750 and Radeon HD 5770. The Radeon HD 5750 looks vastly different from the Radeon HD 5770 with it being shorter and the reference design using a much smaller cooler on the 40nm Juniper GPU. The fan on this heatsink is moderately sized, but during our testing we found it to operate quietly. The GDDR5 memory on the Radeon HD 5750 is not cooled by any heatsinks.
The Radeon HD 5750 only requires a single 6-pin PCI-E power connector for operation. As was mentioned earlier, the Radeon HD 5750 will peak at 86 Watts but when idling can consume as little as 16 Watts of power. The memory ICs used on this Radeon HD 5750 are manufactured by Hynix with a part number of H5GQ1H24AFR T2C 930A. Along the top edge of the graphics card PCB are two connectors for ATI CrossFireX usage.
The connectors on the Radeon HD 5750 that we were looking at include two dual-link DVI, one HDMI, and one DisplayPort connector. This selection of connectors is nice and they are distributed between two expansion slots, with the excess area of the second expansion slot being used for ventilation.
AMD's Radeon HD 5770 reference design has a cooler that covers the entire graphics card, which is also longer than the HD 5750. The Radeon HD 5770 has two openings on the backside of the graphics card for a single 6-pin PCI-E power connector and then for air intake to this graphics card, while the exhaust is at the expansion slot area. Like the reference HD 5750 cooler, this HD 5770 cooler was also quiet during our tests. There are also openings for this cooler along the top edge.
The Radeon HD 5770 has the same connectors as found on the HD 5750: two dual-link DVI, one HDMI, and one DisplayPort. The memory ICs on this graphics card were also manufactured by Hynix and marked H5GQ1H24AFR T2C 933A.
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