It should work fine, it's still a quad core cpu. (That's the whole point in unlocking it so it's not a dual core anymore)
I am running two HD-7850's with a A6-3650@3.56ghz and it works fine. Yes in certain games it's a bit limited. Mostly Skyrim. Games like Metro Last light redux and 2033 run at 45fps average. 1080p mostly high details. Racing games like Dirt2, Gas guzzlers Extreme run well. I even record at 720p using MSI afterburner. (My Llano and your cpu have the same cpu cores in them, so they should be close in speed)
Do test with prime-95 first, make sure your overclock is stable and doesn't have core that fail. I found this out when testing that AMD made the cpu and apu turn off any bad cores but the other ones keep on working so there is no BSOD or lockup. This is so in a server it wont stop working, or any other task. So just because it boots windows and works ok, doesn't mean the overclock is ok.
I was so happy to see 4.1ghz, then a short test showed it's running as a single core.
A fast benchmark i used is Fritz Chess Benchmark. I got 18.34(1ghz Pentium3's) or 8802 points. Do a test at stock speed. Then Overclocked speed. Of course the numbers should keep going up as the clock speed goes up. If suddenly it fails to go up or drops, you know there is something wrong.
Turn off any coolnquiet, and in windows turn off any power management for the cpu. Force the cpu to run at full speed all the time.
(It's in AMD's catalyst too)
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