Why Phenom II X4 965's? That is, assuming the worst, a 140 Watt tdp CPU from 2009 (or, when you are in luck, a 125 Watt CPU -depending on the stepping)
It could of course be that you've ordered them dirt-cheap (they do about a mere 75 Euro's here) and use them only as stop-gap CPUs till either Steamroller or Excavator has shown to be a better performer both in Performance/Watt and on the power intake. There's a wealth of AMD CPUs that will fit in a AM3+ mobo at the moment - including the 95 Watt AMD Athlon II X4 640 that goes here for only 60 Euro's.
Looking at other AMD platforms you can buy yourself a FM1 quad for 60 Euro's as well (the 100 Watt AMD Athlon II X4 641), while a FM2 Quad can be bought for a mere 63 Euro's (the 65 Watt AMD Athlon II X4 740).
No-brain choices as the FM1 A8-3850 -with free running Graphic as compared to the X4- only does 70 Euro's and the FM2 A8 series is only 84 Euo's -including the 65 Watt A8-5500.
The cheapest six-core around here is the 95 Watt AMD Phenom II X6 1045T, that goes away at a little over 90 Euro's.