The tests were performed in a controlled air conditioned room with temperatures maintained at a constant 25c – a comfortable environment for the majority of people reading this.
Idle temperatures were measured after sitting at the desktop for 30 minutes. Load measurements were acquired by playing Crysis Warhead for 30 minutes and measuring the peak temperature. We also have included Furmark results, recording maximum temperatures throughout a 30 minute stress test. All fan settings were left on automatic.
Both cards run at very respectable temperatures when gaming, under 70c.
Sapphire HD5830 Xtreme cooler (left), Sapphire HD5850 Xtreme cooler (right).
The cooler on the HD5830 has less work to do, with the fan peaking at 50%, translating to 1,800 rpm. The fan on the HD6850 on the other hand peaks at 64%, translating to 2,900 rpm. The cooler on the HD5830 has an extra heatpipe, and we feel Sapphire should have used the same 3 pipe cooler on both cards.