Asus SP97-V with I.Q. capacitors

[UraBahn]

None were bulging on this old Super-7 board, but I want NO badcaps in any of my computers.

Replaced countless 1000uf 6.3v I.Q.'s with 1000uf 6.3v Rubycon MBZ and one 1000uf 6.3v Rubycon YXG. I also added some MBZ to empty capacitor pads CC1, CC3 and CC5 on the board. Incidentally, some of the I.Q.s smelled kind of 'fishy' as I removed them.

Hopefully now this board will be able to run stably at 75MHz FSB! (I am running an AMD K6-2 300 MHz chip on the board; with the old I.Q.s I couldn't get it to run at a faster clock for the life of me!)

I'll test it out pretty soon once I get back home. For now here's a crappy pic of the repair; it doesn't really show up too well but the board is now 100% Rubycon-capped.

(BTW admins, sorry if the pic is too big. if it is lemme know and I'll crop it down to a more forum-friendly size.)

[kc8adu]

Re: Asus SP97-V with I.Q. capacitors

just did one for a servo products controller.no bulging but they stunk when i desoldered.
btw some of the problem is pci divider settings.
some settings run the pci over 33.

[UraBahn]

Re: Asus SP97-V with I.Q. capacitors

OK, I tested the board after I recapped it. It works, but the IDE is still flaky running under 75 MHz FSB. SMART probe indicates loads of 'Ultra ATA CRC Errors' piling up by the second and disk access is very slow. Removed two of the 'added' caps, still same result. (Didn't remove the cap on CC1 because it's in the ISA section of the board and I don't think that would have much of an effect on the IDE controller.)

I was testing with a very old DTK 200W AT power supply though, I'll re-check it with a recently 'modified' AT LiteOn 200W and see if the IDE problems keep up. I put my DMM on the power leads of the DTK supply, both 5v and 12v rails look OK though. (My DMM can't pick up ripple however...)

If the LiteOn doesn't improve things I'll hook the HD up to a Promise UATA/33 card I have lying around and see if that helps any.

[UraBahn]

Re: Asus SP97-V with I.Q. capacitors

I don't mean to double-post, but the Promise IDE card seems to have fixed the IDE problems. Power supply change didn't do much; but incidentally my DMM reads the +12v line as 11.88v on average. Is it just me, or is that a little low? 5v line is OK at 5.09v.

I guess this either means that the onboard IDE controller doesn't work well at 75 MHz FSB / 37.5 MHz PCI, or I screwed something up during the recap. (Meh, prolly the latter is true.) Maybe I need to try bigger (as in capacitance) caps? Maybe MBZ series isn't ideal for this board? Or maybe I made my trademark mistake of scraping off an SMT component, this time without realizing it?

I'll worry about this tommorrow. Right now what I need is a break.

[Rainbow]

Re: Asus SP97-V with I.Q. capacitors

PCI runnina at frequency above 33MHz is not guaranteed to work properly. If it works, then great, you're lucky. If it does not, you can do about nothing with that.

[kc8adu]

Re: Asus SP97-V with I.Q. capacitors

worse yet is when folks that dont understand this try to overclock and get their drive scrambled beyond help!

[hampton]

Re: Asus SP97-V with I.Q. capacitors

Ah, fawned memory. I had this board from '97 to '04. Reason I don't have it any more was the price and limit of the 72-pin RAM.

UraBahn, have you tried running the PCI bus asyn? I last chip I had on this board was the AMD k6-3/400. I ran it 6x66, 5x75 and 4.5x83 (Syn and asyn)

Also, do you have the latest BIOS? 108 beta, IIRC.

[UraBahn]

Re: Asus SP97-V with I.Q. capacitors

@hampton: I use the 'unofficial' patched v109-j2 BIOS, provided by Jan Steunebrink(sp?) which provides support for HDDs up to 128GB (no 48bit LBA though ), as well as AMD K6-2+/3+ mobile CPU support. No, I haven't tried setting the PCI to asynchronous mode yet, but I will soon now that you mention it