Originally Posted by LtStinger
Being until very recently a 955 C3 owner for a good while, I read up a lot on CPU/NB overclocking and found real good results with it. I just upgraded to the FX chip and started reading again within the last couple weeks.
Now I wish I could find the post I was going to reference, but I know it was on this site. It may have been where the rumors originated, it was certainly not a small discussion. But basically what I got out of it is that the gains seen from CPU/NB overclocking had their hayday in the PhenomII/Th days, and the FX chips did not see such gains as had shown in the past. It wasn't a bulldozer thing...it was explained a lot with a lot of jargon I cannot remember. It may have had something to do with the L3 cache, and how it was utilized in the FX chips vs how it was utilized in the Phenoms was wildly different. My memory is telling me that's somewhere along the target of the discussion for why the CPU/NB overclock was not as effective....L3 Cache. Does that sound right at all?
I haven't messed with my CPU/NB yet, as I have yet to decide if this is an overclock worth fussing around with. I only use 1600 speed RAM, so if there is a benefit to be seen it would probably be me who would see it, correct? Or is it the other way around? Faster RAM will see more of a benefit from the CPU/NB overclock or slower RAM? And how does it affect timings working with the FX chip, will I need to loosen them to maintain stability, or will it just depend on NB and CPU/NB voltage and how my chip likes it, with timings not being a factor at all?
Appreciate the input, still trying to investigate this area further.
although you are on the right basis " locking " cpu/nb and ht to 2200 showed improvements in benches on BD that is what i was referring which people keep porting over to vishara, which has no basis in fact as vishara does not show these improvements
although you are right about the lack of improvements when compared to PHII
as for you, you may get minor improvements in benches, it will not be enough to care about unless you are truly going for that MAX score.
CPU/nb helps faster speed ram.
amd felt it was a good idea to keep it faster then ram ( max supported ram is 1866) and they capped it @ 2200. ( 83xx, talking about speeds not max capacity ) and i personally have noticed that is about the sweet spot for ram, i run 2400 8gb sticks which are much harder on the imc then 4gb sticks however i can almost match the best 4gb stick scores and only have seen a few past me. i keep my main chip at 2700 and my secondary @ 2600. the 2600 has substantially less scores.