Asus P4T-E ??

[-jj-]

Hi, I have done XP update for few monts ago.
My system are:
WinXP Home edition
PTLE 5.3.1
Asus P4T-E Intel 478/850 motherboard
Intel P4 1500MHz
256Mb kingston 800MHz Rambus
Gigabyte GTS 2 Pro 64MB
Plextor 4x/12x/32x SCSI CD-RW (NCR-scsi v.3.0 card)
2 x Maxtor 40G ATA100 7200rpm hds
Maxtor 40G ATA100 5200rpm hd

System seems to work fine, but plugins takes huge Cpu power. Example "Davec test" results are only 7 tracks (win98 se results was 24+4)!! Is there something special tricks for this MOBO? or do anyone have theese problems, i think that "PT performance"-tree there was a similar problems in this mobo, but there aren´t any answer.
I have done all XP- tweaks and several different ways but no effect. Have anyone have any idea, whats wrong in the picture? Or should i walk in to the MOBO-shop and by new MOBO (and Northwood prosessor?)