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Can't go past 33.5 Mhz PCI bus for my SCSI card =(

C

chuonthis

Member
I have P3-650, an Adaptec 2940 (dunno if it's UW) and a Panasonic 8x20 CDR...

My P3 cpu can get well over 910 but my SCSI card or CDR is limiting me =( The PCI divider is at 1/4 and right now, I'm running it @ 135 Mhz FSB which gives me a 33.5 PCI bus speed...any higher and my CDR will start acting weird. One test that I use to see if it's working is by copying a big file off a CD. It'll work fine in the beginning but after a couple seconds, it'll show a blue screen that says that the CD isn't there anymore...and then my CDR will do a spin up and then I can press enter and it'll continue but then it keeps doing that.

What do you guys think? Is it the SCSI card or the CDR? Any solutions?
 
SCSI cards seem to have a lot of trouble with o/c PCI busses... tisk, tisk, should have bought an IDE CDR! SCSI is pointless on a desktop.
 
That sucks.. I feel really lucky cause I got a 2940U2W back in 96 which is buzzing along happily at 41.5Mhz.

Could it actually be something in the mobo? Have you tried different PCI slots?
 
Heh, yeah...I'm thinking of getting a new IDE CDR w/ Burnproof now...

But other than that...I've had the SCSI/CDR on another computer before @ 75 Mhz FSB w/ 1/2 divider and it definitely doesn't work @ 37.5 Mhz PCI bus...haven't tried playing w/ different slots though...I have an Abit BE6-II rev 1.2

PliotronX, do you have a CDR on your SCSI card?
 
Heh, maybe I should try to run it that high too then? =P If I set my PCI divider to 1/3, and @ 135 FSB, I can get 45 Mhz PCI bus! =) But then I don't think that'd be good for my hd =P (IBM 75GXP 30 GB)

Hmm...just a thought...but for any reason, would a SCSI card need cooling? =P
 
SCSI isn't totally pointless for CDRs...even with BURNProof IDE still uses a lot of system resources in PIO mode, you still can't play quake with an IDE CDR...sure it won't fail to burn properly, but it takes a major framerate hit.

However...with BURNproof and a 12x+ CDRW...you can burn a CD in under ten minutes...write some email and listen to a couple mp3s and then go play quake...

And with nice speedy drives like the IBM 75GXP and the Maxtor DMax+45 SCSI does seem kind of pointless for most users PCs.

If you can afford it I'd get a plextor 12/10/32A and try and pawn off that CDR and SCSI card in FS/T or something.
 
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