Performance Test shows slow Data Transfer..

everything else rates 5.8, 5.9, .... data is 5.2

this is my first build, I'm trying to tune it up some, it can be slow at times. i seem to lose drivers on occation, i have some problems keeping the graphics driver, downloads will drop from 190 kb/s so low it wont play Youtube videos.. load 4 sec..play 2 sec, load 6 sec.. play 2 sec..load 4 ..play 2, etc.... reload the ATI Radeon driver and it's OK. sometimes the sound will quit for a while and come back.

but all in all it works quite well..

ANTEC 900 Case.
ASUS Rampage Formula X48.
Intel Zeon 3110 3.2MHz Core2 Duo.
VISTA 64bit Home Premium.
Silent Knight2 CPU cooler.
8GB OCZ Reaper HPC DDR2 1400.
2x Western Digital Caviar 500GB HD RAID1.
VisionTec Radeon HD 3870 X2.
OPTI UPS Battery Back Up.
Cosair 750 watt PSU

not bad at all.. looks good. although thats some weird stuff that should't be happening.

5.2 seems awfully low, even for mirrored drives? Have you tried using some of the performance guides in the Tutorial section? By default, Vista's hard drive activity is fairly robust, mirroring may just double that activity?

Just a guess... could be wrong... probably am?