Why is my Opteron so hot?

[Ender17]

So I finally got my new Opteron 170 0530TPMW installed and my temps are way too high. At stock voltage and speed, this thing hit 53 C after 5 minutes of dual Prime95. Idle temp is 44 C.

Compared to my old 4400+, which never hit 50 C after 39 hours of dual Prime95 at 2.6GHz and 1.5v

Now I did change CPU coolers, but I thought I upgraded. Went from a XP-120 with Panaflo M1A to a Zalman 9500. Also noticed in my BIOS, it doesn't recognize the model number of my CPU, don't know if this means anything or not.

So, any suggestions before I put the X2 back in and sell this 170?


System specs:

Antec P180, 2 x 120mm Yate Loon fans, blowhole sealed off
PCP&C 510W PCI-E
ASUS A8N-SLI Premium
2 x 1GB Crucial Value
BFG 7800GT with NV Silencer
3 optical drives and 5 hard drives