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- From: mks@cbmvax.commodore.com (Michael Sinz)
- Newsgroups: comp.sys.amiga.misc
- Subject: Re: 040 3000T !!
- Keywords: A3000-T-040 A3640
- Message-ID: <34512@cbmvax.commodore.com>
- Date: 20 Aug 92 01:59:27 GMT
- References: <63764@cup.portal.com> <1992Aug11.135427.5778@lth.se> <8187@sirius.ucs.adelaide.edu.au> <kdarling.714031609@garfield.catt.ncsu.edu> <haley.714204013@unixg.ubc.ca>
- Reply-To: mks@cbmvax.commodore.com (Michael Sinz)
- Organization: Commodore, West Chester, PA
- Lines: 39
-
- haley@unixg.ubc.ca (Ross MacGregor) writes:
- >In <kdarling.714031609@garfield.catt.ncsu.edu> kdarling@garfield.catt.ncsu.edu (Kevin Darling) writes:
- >
- >>jamesp@iagu.itd.adelaide.edu.au (James Pickering) writes:
- >>>Why is it the A3640 only works in a 3000T? The 3000T is almost
- >>>impossible to get down here in Australia, so most people have 3000's
- >>>only. Is the problem only a matter of space or of power?
- >
- >>Could be both. But an Amiga dealer on CIS said that one problem was
- >>with needed physical clearance for a heatsink.
- >
- >Could this be true? Commodore not following it's own specs?
- >After all the criticism of the Toaster! The engineers must be
- >pulling their hair out over this one, if TRUE i MUST qualify (I don't
- >want to be blamed for any nasty roomers :-).
-
- Well, it is somewhat true. To fully work within specs, the heat of the
- 68040 must be taken care of. When the original design was made for the
- A3000, the space for the CPU area was enough for the 3Watts that a 68040
- was supposed to burn. It turns out that this number was low and the real
- power usage is somewhere around 7Watts. Now, to get this to work correctly,
- (within specs, since we do not do things outside of specs such as run a
- 25MHz part at 28MHz, etc) the head sink had to have certain properties.
- Maybe future heat sink designs can make this board fit, but currently the
- heat sink required is a bit too large to fit within the A3000 case work.
-
- This is why the board is only being sold for the A3000T. Now, if technology
- can solve either the power used or the heat sink size problems, I would think
- that it would be possible to make such a board to fit the A3000. (Note that
- I do not know if there would be a marketing push for such a beast if it were
- to become available...)
-
- /----------------------------------------------------------------------\
- | /// Michael Sinz - Senior Amiga Systems Engineer |
- | /// Operating System Development Group |
- | /// BIX: msinz UUNET: mks@cbmvax.commodore.com |
- |\\\/// Programming is like sex: |
- | \XX/ One mistake and you have to support it for life. |
- \----------------------------------------------------------------------/
-