2.5 Ghz NB on gigabyte 990fx ud3?

My first attempt at overclocking my 1045t:

I increased the FSB to where the CPU was running just under 3.4 Ghz (think the value was 250), changed the timings on my patriot "sector 5" RAM to 9-9-9-24 to run at 1332 (I, wanted 1333 but that's where the multiplier/fsb got me)

I was surprised to see that I could leave the other two variables (One was the HT and I thought the other was the NB) in "auto" with the target fq's showing 2000 in the BIOS. So I just let the MB do its thing.

It runs well with these settings, (although 20 minutes of prime 95 put core temps into the low 50's ...I'll look into some better cooling) but CPUZ shows 2500 as the value for NB under the speed tab.

I thought I read somewhere that the NB limit is 2000.

I'm I going to hurt the MB? Do I need to make changes to bring the NB down to 2000? (the HT fq is 2000)

*I have not messed with voltages.