8rda+ sound problems when running high fsb

[mal0]

hi guys,
some days ago, i did the vdd mod - now i can go up to fsb210, but after some stress for the cpu, my sound won't work anymore!
eg when i run prime torture test for a about 20min and then start winamp, it will cut off and take about 70% of the cpu time??
i have a zalman on both the northbridge and the southbridge and my vdd currently is @ 1.75v.
can anybody help??

[mal0]

very strange! now i improved sb cooling, increased vdd and still no go!
what could it be? is it the psu? i tried a pci gfx card, but i didn't get a screen... please help me!

[Genius]

You can disable APIC in the bios and that should solve it. You'll probably have to reinstall Windows or change your computer type in the XP device manager (Standard PC or ACPI PC). With APIC enabled I think it's something to the effect of uniprocessor something or other. Change this before disabling APIC in the bios.

[Truckchase!]

Originally posted by Genius
You can disable APIC in the bios and that should solve it. You'll probably have to reinstall Windows or change your computer type in the XP device manager (Standard PC or ACPI PC). With APIC enabled I think it's something to the effect of uniprocessor something or other. Change this before disabling APIC in the bios.

APIC won't cause the problem he's having with onboard sound.

If you clock down the fsb and the prob goes away (as I assume it does based off of your description) then you just have the fsb too high. Back off a bit.

[mal0]

thanks guys!
very strange!
now it is runnning all fine?!
i added another 40 and 60mm fan on the nb and now it works! i always thought that this was a sb heat problem...

[gemaviper]

Originally posted by mal0
hi guys,
some days ago, i did the vdd mod - now i can go up to fsb210, but after some stress for the cpu, my sound won't work anymore!
eg when i run prime torture test for a about 20min and then start winamp, it will cut off and take about 70% of the cpu time??
i have a zalman on both the northbridge and the southbridge and my vdd currently is @ 1.75v.
can anybody help??

I got the same prob - High FSB = sound disables. To fix this, you have to apply more voltage to the NB to stabalize it. A good way to make sure your NB has enuff voltage is to run 3dmark or Q3 and look closely for graphic artifacts/glitches. If you get artifacts, apply more vdd voltage until they go away. And keep that NB cool. I had a 60mm Al cpu heatsink and 60mm fan on my NB with lapping and AS Epoxy. It ran 232FSB @ 2.2v pretty cool @ 32C idle, but not stable (think my PSU is the problem) Damnit, you can apply up to 2.3v max on the A3 chipset, but make sure you have a quality PSU with 400w+! Running my NB @ 2.2v for days 24/7 didnt damage it, but using a 250w cheap PSU on my mobo for "testing" fried a little chip on my mobo.