K7T266 Pro-R cannot raise fsb higher than 138 (usb error)

[yaputzis]

Hi everyone,

I am trying to raise the fsb higher than 138 but my system won't boot into windows. Is there a trick or updated bios? I am using ver. 1.60 right now. Currently running my Athlon t-bird 1.4ghz@1.5ghz (11x136) auto vcore.

My system config:

ATX Midi Tower 300w PSU with 3 fans
MSI K7T266 ProR (MS-6380)
Athlon T-bird 1.4ghz@1.5ghz (Arqua Thermoengine Turbo)
512mb DDR PC2100
Western Digital 30gb 7.200 ATA100
Hercules 3D Prophet 4500 64mb
SoundBlaster Live! 1024 player
AT&T Firewire IEEE 1394
Zoom V92 PCI Faxmodem
Asus CDS-500
Yamaha CRW8424E
HP Deskjet 690C
Acerscan Prisa 320P
Philips 150B TFT monitor
Microsoft Intellimouse PS2
Logitech PS2 keyboard
1,44 floppy drive
Win98se + Win2k SP2 Dual boot

Please advise.

Regards

Antonis

[Mntsnow]

Check to see what your PCI buss is running at when your FSB is set to the 138. I'm wondering if your divider is not functioning correctly and the buss is being overdriven Any utility like Sandra can tell you what your pci buss and other busses are running at.

[jadison]

Try adjusting the voltage in the BIOS, or if you have jumpers on ur mobo., adjust it there.

BTW, you can download SiSoft Sandra HERE (http://www.sisoftware.demon.co.uk/sandra/)

[nbk13nw]

Known issues with the KT266 boards

USB dropouts: Download a patch and newer BIOS at the MSI site -- http://www.msi.com.tw/support/driver/others.htm



USB doesnt work over FSB 137: No fix unless a newer BIOS has addressed this issue. A quick fix is to install a PCI USB card and disable the onboard USB.

Good luck

[yaputzis]

Thank you all for your inputs.

I have read at another forum that if the +5v of my mobo drops down and stays there, then a biger psu will be needed. Is this correct?

My +5v drops down to +4.75v to +4.80v with my 300w psu.

Please advise.

Regards,

Antonis

[nbk13nw]

That is possible, but... Alot of times the readings are not correct from the motherboard. I bought the Enermax 550 watt PSU and was seeing readings of 4.90 to 4.95 on the 5 voly rail with MBM. But, after putting a load on the PSU and checking with a multi-meter, the voltage was 5.1 to 5.3 volts.

I would first try to confirm the voltage. If it is low then replace. Get the latest BIOS and see what happens.