overclocking trouble

acascianelli · Jul 30, 2002, 08:05 AM

I have a Celeron 1300 running on a soyo sy-tisu. i am having a problem with the onboard audio on the motherboard whenever i go over 110 fsb. at 111 mhz the sound makes strange pops and cracks, and at 112mhz the sound refuses to work, anything above 112mhz the device will not even be detected at bootup. when i put in an external audio card i can take the processor up to 120mhz fsb(1550~mhz). any ideas why the onboard audio fails at overclocked speeds. i am only using pc100 ram but the board controlls ram speed independent of the fsb so i did not think that this would matter.

~~Sourcer_2002~~ · Jul 30, 2002, 08:08 AM

There onboard sound card cant handle it if you wanna o/c it use you external card. Or just go without sound.

acascianelli · Jul 30, 2002, 08:12 AM

i was afraid of that but i was trying to be optimistic and thinking it could be something else.

~~Sourcer_2002~~ · Jul 30, 2002, 08:15 AM

Nope the onboard sound cant handle it.

~~JAV~~ · Jul 30, 2002, 02:55 PM

The on-board is PCI bus controlled & runs @ 1/3 of the FSB. For 100mhz FSB that will give you a 33mhz PCI bus speed. At 111/3 = 37mhz & all your PCI devices will run at that rate. You can hear its effect on the sound, but if you have a PCI modem ...

Running the FSB @ 111+ w/PC-100 is futile anyway. PC-133 will handle it quite well tho'.

Can you adjust the PCI bus/devices divider in BIOS? If you can set it to: 1/3.11~1/3.36 You should be able to get a 111-112FSB & the PCI will be 33-36mhz. Whatever you determine your FSB @ divide it by 33-36 & that # will be the 'divider'.

FWIW: I run a 36.3 PCI bus & have been for ~a year w/o any adverse effects ... but I do have PC-133 RAM too.

HTH,

JAV
GBA!

PS: the FSB setting also affects the AGP rate & if you're running an AGP4x card, you NEED PC-133 just to cover the 4x (33mhz) AGP rate. 4x33=133

Jul 30, 2002, 08:05 AM	#1
acascianelli DriverHeaven Newbie Join Date: Jul 2002 Posts: 8 Rep Power: 0	overclocking trouble I have a Celeron 1300 running on a soyo sy-tisu. i am having a problem with the onboard audio on the motherboard whenever i go over 110 fsb. at 111 mhz the sound makes strange pops and cracks, and at 112mhz the sound refuses to work, anything above 112mhz the device will not even be detected at bootup. when i put in an external audio card i can take the processor up to 120mhz fsb(1550~mhz). any ideas why the onboard audio fails at overclocked speeds. i am only using pc100 ram but the board controlls ram speed independent of the fsb so i did not think that this would matter.

Jul 30, 2002, 08:12 AM	Thread Starter #3
acascianelli DriverHeaven Newbie Join Date: Jul 2002 Posts: 8 Rep Power: 0	onboard sound i was afraid of that but i was trying to be optimistic and thinking it could be something else.

Jul 30, 2002, 08:08 AM	#2
~~Sourcer_2002~~ BANNED Join Date: Jul 2002 Location: Indiana , USA Posts: 2,677 Rep Power: 0	There onboard sound card cant handle it if you wanna o/c it use you external card. Or just go without sound.

Jul 30, 2002, 08:15 AM	#4
~~Sourcer_2002~~ BANNED Join Date: Jul 2002 Location: Indiana , USA Posts: 2,677 Rep Power: 0	Nope the onboard sound cant handle it.

Jul 30, 2002, 02:55 PM	#5
~~JAV~~ Banned Join Date: Jul 2002 Location: California, USA Posts: 283 Rep Power: 0	The on-board is PCI bus controlled & runs @ 1/3 of the FSB. For 100mhz FSB that will give you a 33mhz PCI bus speed. At 111/3 = 37mhz & all your PCI devices will run at that rate. You can hear its effect on the sound, but if you have a PCI modem ... Running the FSB @ 111+ w/PC-100 is futile anyway. PC-133 will handle it quite well tho'. Can you adjust the PCI bus/devices divider in BIOS? If you can set it to: 1/3.11~1/3.36 You should be able to get a 111-112FSB & the PCI will be 33-36mhz. Whatever you determine your FSB @ divide it by 33-36 & that # will be the 'divider'. FWIW: I run a 36.3 PCI bus & have been for ~a year w/o any adverse effects ... but I do have PC-133 RAM too. HTH, JAV GBA! PS: the FSB setting also affects the AGP rate & if you're running an AGP4x card, you NEED PC-133 just to cover the 4x (33mhz) AGP rate. 4x33=133