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- Path: sparky!uunet!mcsun!uknet!bcc.ac.uk!link-1.ts.bcc.ac.uk!ucess2j
- From: ucess2j@ucl.ac.uk (Dr Jaroslav Stark)
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: Crippled IIvx ?? Not really.
- Message-ID: <1992Dec14.153628.19581@bas-a.bcc.ac.uk>
- Date: 14 Dec 92 15:36:28 GMT
- References: <D2150056.kmtq68@erics.infoserv.com> <gf9sL1O00aw_Iw=8Ei@andrew.cmu.edu>
- Sender: news@ucl.ac.uk (Usenet News System)
- Organization: Bloomsbury Computing Consortium, London
- Lines: 13
-
- > The macs speedup will probably be not as strong as the pc's speedup
- > for this 'clock-doubling' technique because the main speed hose is the
- > memory, and 486's have that 8k internal cache and usually have an
- > additional 64-128k cache on top of that, while the 2ci and 2vx only
- > have a 256 byte local cache and 32k external cache.
-
- True, but on a IIvx the 32k external cache presumably runs at the 'doubled'
- speed i.e. 32MHz, whilst on the 'clock-doubled' 486 systems that I was
- referring to I beleive that the external cache runs at the bus speed.
-
- J. Stark
-
- (j.stark@ucl.ac.uk)
-