+12V Ripple Testing


Even though we did not push the BFG ES-800 to its limit, its ripple suppression is some of the best we have seen in recent months. As load increased, the traces on the o-scope barely registered an increase and when everything was said and done the maximum ripple we saw was a mere 28mV-pp.


Acoustical Performance

Since we are testing this power supply with a pair of HD2900XT graphics cards which can only be described as having the acoustical profile of a Shop-Vac on roofies and Red Bull, we tried to isolate the ES-800 as much as we could while we ramped up the power consumption.

That being said, without a doubt the 135mm fan works its magic and throughout all of our tests the power supply stayed extremely quiet. Fan speed did noticeably increase but it did so in a very linear fashion where any increase in rotational speed was not accompanied by higher noise output. Even at the end of our one hour System Stress test the fan was still spinning silently along since it was still more than capable of moving enough air that the interior of the ES-800 didn’t get too hot. More and more power supplies are being produced with 135mm and 140mm fans and the increase in airflow while spinning at low rpms they are able to produce is second to none.