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- Newsgroups: biz.zeos.general
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!spool.mu.edu!uwm.edu!zazen!doug.cae.wisc.edu!keiths
- From: keiths@cae.wisc.edu (Keith Scidmore)
- Subject: Re: Availability and RAM Question
- Organization: College of Engineering, Univ. of Wisconsin--Madison
- Date: 30 Dec 92 10:23:35 CST
- Message-ID: <1992Dec30.102335.2082@doug.cae.wisc.edu>
- References: <3l227df@rpi.edu>
- Lines: 90
-
- In article <3l227df@rpi.edu> strider@clotho.acm.rpi.edu (Greg Moore) writes:
- >
- > A couple of questions and comments.
- >First: what is the current time delay between ordering a system
- >and the shipping date? And please, I'd like a realistic answer,
- >not the standard "Oh, 2 weeks, no problem." If it is going to
- >take over a month, fine, as long as I know in advance.
-
- I got mine 2 days late. It took 5 days rather than three and was
- ordered a week prior to Xmas. It pissed me off because the saleman
- insisted that it would go out that day. No biggy, I just hate being
- lied.
-
- > What is the current vide card that is ACTUALLY shipping?
- >I know for a while you folks were advertising one, but needing to
- >ship another due to availability problems. Is the loca bus video
- >card shipping and is it in fact any faster than the Diamond 24X?
- >If not, can I order the 24X instead?
- >
-
- I'll leave this to Jim Erickson. I can tell you that I was shipped
- the 24X card. Diamond rewrote the WD drivers on this card to get the
- extra speed they wanted. I've had some problems (all non-fatal) and
- some of the mags have made comments about flicker, and odd Windows
- behavior. I run OS/2 2.0 and do notice the flicker and have had color
- changes occur during task switching. Switching tasks again fixes the
- problem.
-
- > Any clue (since I've not heard elsewhere) when/if the
- >P24T chip will ship for upgrading?
-
- Intel is saying possibly 1994 to as late as 1995. It depends on who
- you talk to. The p24T, btw, isn't the same chip as the p5. It
- will be more like a Pentium technology overdrive chip.
-
- > Finally, I'm thinking of ordering a machine with 8 Meg
- >of RAM (instead of the 16 Meg package). However, I want to be able
- >upgrade the machine to the full amount someday (64 Meg I believe).
- >Will I be able to do this without throwing out the original 8 Meg
- >of RAM?
-
- You may want to throw out the memory anyway. The Zeos manual
- says the memory system is desiged to perform optimally with 50ns
- rams. Jim, please correct me on this if I'm wrong, but the
- memory is designed to work in paged-mode and is not interleaved. The
- tests I've done show it to be quite fast if you lie to the bios
- and tell it you have 60ns rams rather than the 70ns rams that come with.
- Still, at some future date you may want to put in 50ns rams. My tests
- were without a L2 cache and with the L1 cache diabled.
-
- Zeos is not the only company to run into availability problems with
- 50ns rams. It is part of the risk you take if you want cutting-edge
- systems with features like the P24T upgrade socket. There are only
- 3 places you can buy P24T boards. Zeos is the only one of these that
- also has VLB, I believe.
-
- HEY YOU AT ZEOS, IT SURE WOULD BE NICE IF YOU CACHES WOULD CACHE
- WRITES AND READS! A NICE WRITE-BACK CACHE WITH ONE CYCLE ACCESS
- TIME WOULD MAKE THESE MODULES WORTH PUTTING IN THE MACHINES YOU
- SEND IN FOR REVIEWS. A WRITE-THROUGH CACHE ONLY DOES PART OF THE
- JOB.
-
- > The machine I'm looking to order is the Package #3:
- >486DX2-66 with 8 Meg of RAM, 200+ Meg hard drive, dual floppies,
- >in a vertical case and with either the 128K or 256K RAM cache.
-
- I was told that the 256K ram cache is Vaporware. I ordered one
- and the salesman failed to tell me that these modules don't
- even exist yet (per a Zeos person I contacted). I don't know
- if this is true for the 128K cache too. Nonetheless, I can
- live without a cache for a while. Its better to wait than to
- end up with one that was rushed out the door and has problems.
-
- I benchmarked the Seagate 245MB drive against the Fujitsu 510 IDE
- which HDI said was faster and found that the Seagate is 10%-15%
- faster. I don't think you can buy a drive in that price range
- that will deliver better performance. This drive screams! A word
- of caution, some manufacturers like Quantum and WD are putting some
- pretty nice caches on their drives. The result is that when the
- mags test them they look very fast. If you run a large software
- cache on top of the disks small cache all the small cache will
- see is LRU blocks from the software cache. This means that the
- sofware cache strips away some of the caching benefits of the
- drive. Look-ahead buffering is a different matter.
-
- I think the Package #3 drive is quite a bit faster than the 330
- MB WD I think is sold with package 4. It spins faster and has
- a lower quoted seek. I have not actually tested one, however.
-
- Keith R. Scidmore
-