Sapphire Radeon HD 7970 TOXIC 6GB

Review: Sapphire Radeon HD 7970 TOXIC 6GB

Temps, power and noise

Idle and in-game temperatures are excellent for a super-high-end card.

And the quality of the cooler is indirectly confirmed by the amount of heat it has to dissipate. Run in its Sunday-best form, with the Lethal Boost switched on, the system pulls almost 100W more than a vanilla GTX 680 and, tellingly, 56W more than a Radeon HD 7970 GHz Edition card. Remember the increase in GPU voltage for the TOXIC? It runs at 1.256V in standard mode and 1.281V when in Lethal Boost livery. Double-sized framebuffer, extra frequency and voltage increases don't make for attractive power-draw readings, obviously.

The card's fans are clearly audible when it's running flat out, and they spin at 3,250RPM after 10 minutes of gaming in Batman: Arkham City, compared to 2,600RPM in non-Lethal Boost mode. But you didn't expect the fastest Radeon HD 7970 around to be whisper quiet, did you?

Review: Sapphire Radeon HD 7970 TOXIC 6GB

Temps, power and noise

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