High FSB causes data corruption?

[ktch]

I have Abit KX7-333 board, Crucial 2100 RAM and Western Digital ATA 66 hard drives and when I run my 1600+ at FSB 157 with 1/4 PCI divider and my data get corrupted, with 1/5 divider it seems OK.

Does anyone have that problem? Is there any way I can get around that problem so I can use 1/4 divider.

 

[dude]

More likely your hard drive can't handle the higher fsb. It seems like the newer the drive, the more tolerant it is against higher fsb.

 

[DAPUNISHER]

Yeah your HDD is taking a dump at that PCI speed, why do you want the 1/4 if you can use the 1/5? 😕

 

[bigboxes]

I have your solution... lower your fsb to 133 and you can use your 4:1 divider with no problem. Why wouldn't you use the 5:1 divider if it works?

~box

 

[Duvie]

Remember one thing...It isn't the fsb alone. It is the board and its lack of a lock that allows the pci mhz to get too far out of spec that allows this.

My last 2 out of 3 p4 mobos had an agp/pci lock so for me 171fsb has no corruption...The only thing stopping me from 200mhz fsb would be the cpu itself...


With the 1/4 divider at 157 the pci was 39mhz...not too bad...My HDD ran 8-10 weeks with no problems at 40-41mhz....

With a 1/5 divider at 157 the pci is 31.67mhz or slightly belowe spec....


Why don't Amd mobos offer locks instead of playing this divider game???

 

[panhead49]

it all works out to the same thing in the end.......locks....dividers.......potato...potaato.....same-e same

 

[bigboxes]

With locks, the pci and agp buses stay locked at 33 & 66Mhz respectively as you increase fsb. With dividers, the pci & agp buses get more out of spec as you increase fsb. I like amd, but I would love to have locks on my mb anyday.

~box

 

[jiffylube1024]

Originally posted by: bigboxes
I have your solution... lower your fsb to 133 and you can use your 4:1 divider with no problem. Why wouldn't you use the 5:1 divider if it works?

~box

Of course that would work - 133 FSB with 4:1 divider is the default setting!

As for the divider - definately use the 5:1 divider at 157 MHz FSB: it's way closer to spec (33.3 MHz). A high PCI speed can very easily cause corruption.

 

[ktch]

Does the whole system run faster with 1/4 divider when high FSB is used?

 

[panhead49]

yes.......anything connected to the pci bus..cards..ect.. .........memory......hard drive.....almost everything.......that is why its better(faster) to have a divider that a lock.....you have control over the bus speed...down to the mhz....the down side is hard drive corruption.....around 40 and above depending on the drive and board....