poor performance with a new motherboard

[Baurzhan Ismagulov]

Hello,

I was using Elitegroup KT600-A with Adaptec 29160 and Seagate
ST3146855LC. With this setup, hdparm -tT was reporting 115 MB/s.

Now, I've upgraded to Gigabyte GA-P35-DS3. The same HBA, the same drive.
hdparm -tT reports 85 MB/s. Where should I look?

Thanks in advance,
-- 
Baurzhan Ismagulov
http://www.kz-easy.com/