So I did unlocked my Athlon X2 5000 to a full pledged phenom II.
Prematurely, I hit my fsb wall at 280. I didn't expect it to be that soon. Was really expecting to at least hit 300 on my MSI 785GT-E63.
Here's my final attained oc.
Four cores working stable on a 5 hour Prime95 run.
Quick review on how to unlock.
1. You need an Athlon X2 5000 ( no "+" ) running at stock 2.2ghz.
2. A board with acc feature. At least has the sb710 chipset on the southbridge. Though there are some 780g based board like the Emaxx 780G-ACC which has acc.
3. Guts

. In my case, I didn't have any alternative route. If I wasn't able to unlock it in the first place, I'm stuck with an old tech, slow, athlon x2. The l2 cache is even nowhere near decent (1mb ).
Important:
Look for these batch codes if you're planning to get one:
0938EPMW
0938EPAW
0938EPCW
It's imprinted on the chip so take a peek first inside if you're planning to get one.
note:
Unlocking process is a hit or a miss. No 100% assurance at all.