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Sapphire HD 7970 OverClock Edition Dual-X Graphics Card Review

Sapphire HD 7970 OverClock Edition Dual-X Graphics Card Review

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Sapphire HD 7970 Dual-X Cooling OverClock Edition Graphics Card Review

Power, Temps, Noise and Overclocking

What Is Phd Degree As with the Radeon 6900 series and GTX 500 series the 7900 series performs power management in a different way to older cards so we have changed the way we test power and temperature levels in our reviews. For idle power we list the full system use at the wall after sitting at the desktop with no activity for 5 minutes. Load power is the highest reading we saw for the full system when testing during this review. Temperatures are taken in the same way. Noise levels are taken after a period of prolonged gaming in a scenario which applied maximum load to the GPU.

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Sapphire 7970 Dual-X BIOS 1 124w 290w 32°C 71°C
Sapphire 7970 Dual-X BIOS 2 125w 297w 33°C 72°C
GeForce GTX 580 OC 136w 351w 30°C 67°C

Order Resume Online Uniqlo For the comparison with our overclocked GeForce card the Sapphire model does well at idle, offering similar temperatures but significantly better power use. At load that changes a little with our Zotac OC model offering a little better on the temperature front but Sapphire excel on power use, knocking 60w or so off the GeForce reading. Order A Research Paper Online How To Write College Admission Essay 2 Page

Sticking with the power and noise theme for a moment one of the key 7970 features which was covered in our original review is the advanced power management which has been implemented in Crossfire. In that mode AMD are able to send the second card to an ultra-low power state when idle and as shown below this means turning the GPU and memory to 0MHz.

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As an added bonus to the second (or additional) cards minimal power use the driver also shuts down the fan turning the card into a silent model. For completeness before we look at overclocking, also included above is a noise level video for the Crossfire configuration at load. Sapphire fully support this technology on their 7970s.

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Overclocking on the Sapphire 7970 is a simple process; we open our driver control panel and head into the Overdrive section or use Sapphires own TriXX utility. In there we can begin moving the sliders to our desired speed and it is as easy as that.

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On our sample we were able to achieve 1230MHz on the core and 1515MHz on memory with BIOS 2. This is higher than what we achieved on the original reference card and therefore the overall 3DMark score, and performance increases also.

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Stuart Davidson