home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sun-barr!cs.utexas.edu!zaphod.mps.ohio-state.edu!samsung!transfer!necis!dlyons
- From: dlyons@necis.UUCP (Dave Lyons)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: 486/50DX and 486/33DX: P5 Upgradable?
- Message-ID: <1664@necis.UUCP>
- Date: 22 Jul 92 15:26:09 GMT
- References: <RFowler.284@kelvin.jpl.nasa.gov>
- Organization: NEC Information Systems, Acton, MA
- Lines: 31
-
- In article <RFowler.284@kelvin.jpl.nasa.gov>, RFowler@kelvin.jpl.nasa.gov (Robert A. Fowler) wrote:
- > No, *ALL* 33MHz i486-33 montherboards have a 66MHz occilator, becuase normal
- > Intel CPUs (80x86) require a 2x clock. So to run at 33MHz it needs to be
- > suplied with a 66Mhz clock. The DX2 CPUs will run on a 1x internal clock,
- > there for a 66Mhz DX2 needs a 66MHz occilator, not a 132Mhz one.
-
- BZZZZZT!!! Wrong answer, thank you for playing our game.
- 80486 chips use a 1x clock wher 80286 and 80386 chips used the 2x
- clock you are referring to. This was one of the 80486 chip's biggest
- advances. You are correct, however, that the DX2 chips will also use
- a 1x clock.
-
- > ObWarning: Make sure that there is a 100Mhz crystal on that i486-50
- > motherboard you just got, (if it's a 50Mhz one, you just got ripped off,
- > and you have a 25MHz computer).
-
- Great advice. Make some poor schnook look like a real jerk in front
- of his dealer:
-
- "Hey what's going on. That system you sold me only has a 50MHz
- crystal and I saw on the net that it should have a 100MHz one. You're
- trying to rip me off"
-
- It's one thing to be incorrect about something, but it's much worse to
- play advisor when you don't have the right answers.
- -- Dave --
- --
- ***************************************************************************
- DaveJ Lyons DoD #0633 dlyons@necis.nec.com (603)878-2567 BBS
- Opinions expressed are mine. My company doesn't even know I'm here (Shhhh!)
- ***************************************************************************
-