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AMD Radeon HD 6870 and 6850 review

by Tarinder Sandhu on 22 October 2010, 03:00 4.5

Tags: AMD (NYSE:AMD), Sapphire, HiS Graphics

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Sapphire Radeon HD 6850 - something different

The status quo with any new GPU launch is for a partner to run with the reference design and then, a while later, launch a customised PCB and cooling solution that betters the AMD-supplied card in every way.

Sapphire Technologies has decided to come out of the gate with an in-house-built Radeon HD 6850 1,024MB card.

Appreciating that the cooler has to keep a mid-range GPU under thermal wraps, Sapphire opts for a dual-slot taking heatsink that's outfitted with two super-chunky heatpipes running through an aluminium block.

The plastic shroud hides the fact that, as we look at it, there's a thin-ish heatsink over the power-delivery components on the left-hand side.

While fan-speed numbers aren't explicitly reported, the large fan chugs along at a whisper-quiet 33 per cent load when the GPU is idling, rising to an acceptable 61 per cent load under some FurMark love. Sapphire bundles in its TRIXX utility that enables control over the fan speed, GPU voltage, and core and memory clocks.

A relatively good noise profile is inextricably linked with the GPU's heat-making capacity. Rated at 127W and therefore using a single six-pin PCIe connector, the Sapphire Radeon HD 6850 is, in all circumstances, a quiet mid-range card.

The efficacy of the cooler will enable Sapphire to release pre-overclocked HD 6850s pretty soon, but this card reports in at a reference 775MHz core and 4,000MHz GDDR5 memory.

The card-wide plastic shroud is a little pointless on the right-hand side, as there's no real means of channelling the heat out of the back and through the shield's vent. Rather, heat escapes from all sides, warming up your chassis.

AMD clearly thinks that three- or four-way CrossFireX should be the domain of truly high-end cards. This being the case, Radeon HD 6850 ships with a single connector - good for attaching to one other card.

Sapphire's jiggled the standard outputs of Radeon HD 6850 by dropping the second mini-DisplayPort connector and instead provides a full-sized DisplayPort.

Be aware of the DVI ports when plugging in a 30in monitor, because the lower DVI is limited to single-link transfers, meaning that, say, a Dell 3008FPW will present at 1,280x800px instead of 2,560x1,600. Not good when you're running high-resolution benchmarks!

Measuring 8.5in inches from the edge of the shield to the top of the PCB, Sapphire's card is an half-inch shorter than the reference. Size matters, huh?

Pre-benchmark summary

Sapphire's custom Radeon HD 6850 1,024MB graphics card is equipped with an upgraded cooler and smaller PCB than the reference design. We expect it to ship for around £150, beginning today, and the retail-box package will have an HDMI cable thrown in for free.