In a message dated 11/30/02 1:39:59 AM, [EMAIL PROTECTED] writes: << Hi yes the card says high performance processor card. >>
Then, there can be no doubt that this is a Mach5 processor card (see below). >> the chips on the side say 250 300 350 400 and the 300 has a little bar connecting but the person i got it from says he was told it was a 250 >> This is possibly only if someone has modified the card. The chip resistors which are exposed to view are non-functional, and are placed there to indicate how Apple manufactured the card. The REAL specification of the processor speed is done with another set of chip resistors which are located under the heatsink. So, if someone were to have disassembled the card, reset the hidden chip resistors, but left the externally visible resistors as-is, you could indeed have a card which stated 300 MHz, but was really set for 250 MHz. Not very likely, but it is possible. >> i need to know if the psu will run a 8600 mach v board as i have one coming or will i need to get an 8600 psu >> A 7300 PSU should operate your 8600 Mach5 motherboard (the power connections are quite similar, but they are not identical). You will, however, be limited by how many drives you can handle with the 150 watt 7300 supply, but then the 7300 case isn't particularly expandable anyway. >> and finally why not try it in my 7300/166 (i have not yet but i was tempted) >> The architecture of a Mach5 processor card is quite different from a pre-Mach5 processor card. They aren't intended to be interchangeable, and even those third-party processor cards which are intended to work in either a pre-Mach5 slot or in a Mach5 slot require different DIP switch settings for pre-Mach5 vs. Mach5. The Mach5 processor card incorporated an on-card switching-type regulator; the pre-Mach5 card has no such regulator. Additionally, all cache control lines are deleted from the Mach5 processor card as the cache is on-card; the pre-Mach5 card supports off-card (i.e., on-mobo) cache. IBM defined the architecture of the PPC (and it owns the name PowerPC). The progression of processor cards included the 601, 603, 604 and 604e, all with the same interface to the mobo. With the 603ev, IBM departed from that architecture because the performance limits had been reached with the 233 MHz 604e. 250, 300, 350 and 400 MHz PPC 604ev processor cards weren't intended to be form-fit-function compatible with the previous 601/603/604/604e cards ... and they aren't. -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
