Messages in this thread | | | Date | Wed, 21 Mar 2001 14:18:50 +0000 | From | Jonathan Morton <> | Subject | Re: Only 10 MB/sec with via 82c686b chipset? |
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> Duh, before making such a claim you should consider the fact that > this is overclocking your PCI/AGP bus and I have yet to see any > graphic cards/IDE controllers/other devices which are rated for > 37MHz PCI bus speed.
The "blue and white" PowerMac G3 and certain early PowerMac G4s used a 66MHz PCI card for graphics in lieu of proper AGP. 66MHz PCI is used in certain high-end workstations, as well, but it's not normally found on consumer-level devices.
Look at 'lspci -vvv' output for the "66MHz" flag on the devices listed there - all the ones in my Duron system leave it unset, except for my (very recent and pretty nippy) SCSI controller and (AGP) video card.
That said, *most* PCI devices don't like being overclocked, and it's not well known that pushing the system bus also pushes the PCI and ISA buses in the same manner. A friend of mine had *severe* locking problems with his system when he inserted his cheap SCSI adapter into his overclocked machine, even though the other cards handled it OK (relatively speaking - I'm not convinced). I don't know how far he'd overclocked it, but 37MHz kinda rings true.
-------------------------------------------------------------- from: Jonathan "Chromatix" Morton mail: chromi@cyberspace.org (not for attachments) big-mail: chromatix@penguinpowered.com uni-mail: j.d.morton@lancaster.ac.uk
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