No it's not, it's a crippled Phenom I aka Agena. AMD never made any K10 dual core processors at 65nm.
OP, I doubt yours will unlock, the majority of them never did and reports of them unlocking didn't come out until near the end of their manufacturing. Enable ACC and you'll see if it does or not, but I know mine never did anything with ACC.
Actually Uncfan, Loneninja was correct. The 7750 is a Kuma dual core which was nothing more than an Agena phenom with 2 disabled cores. There are 2 more cores on that die. At the time, AMD was still producing the last of the Brisbane X2 chips. Those were the native dualies. Native Phenom based dual core chips didn't come around until after the 45nm die shrink.
As for unlocking, I have not heard of it being done on the Agena chips at all. That may be due to the fact that AMD had lower yields and a larger percentage of the disable cores were actually defective. It could be it just didn't work on the Agenas, or perhaps fewer people had ACC available since the SB 750 was released fairly late in the Agena cores lifecycle and the 710 even later.
Give it a whirl. See what happens and let us know.
there have been very little if any attempts to unlock these cpus because unlocking a dual core 7750 with its 95 watt tdp would result in a chip with a 190watt tdp
btw only intel has been known to glue dies together, all amd duals quads and hexas have been native, exept for the recently released opteron 12 core which is connected by 4 dedicated hyper transport links, not thru fsb like intel