Yes, stock coolers for the FX 8150 are weak in dissipation, that was told in many reviews, mine was too. First day I was making 67 degrees and had to buy one Corsair H70 water cooler, from that day on, no problems... temperature reached a top of 63 degrees after a very long full 8 core processing. Usual temps are around 45/50 (35 on winter)
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AMD FX 8150 + Corsair H70
Asus Sabertooth 990FX v1.0
Gigabyte GeForce 560Ti SOC
Corsair Vengeance DDR3 1866 16gb
Seagate 7.2 320gb 16mb + Western Digital 7.2 500gb 32mb
Corsair AX1200
Corsair Graphite 600T Mesh
Samsung S27A350 27' FullHD 2ms
Windows 7 Ultimate x64