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- Path: sparky!uunet!cis.ohio-state.edu!rutgers!news.columbia.edu!cunixb.cc.columbia.edu!mig
- From: mig@cunixb.cc.columbia.edu (Meir I Green)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: 486/50DX and 486/33DX: P5 Upgradable?
- Message-ID: <1992Jul21.044955.22520@news.columbia.edu>
- Date: 21 Jul 92 04:49:55 GMT
- References: <1992Jul14.154958.9913@cs.tcd.ie> <BrnLqE.6z5@mudos.ann-arbor.mi.us> <7@zeos.COM>
- Sender: usenet@news.columbia.edu (The Network News)
- Reply-To: mig@cunixb.cc.columbia.edu (Meir I Green)
- Organization: Columbia University
- Lines: 28
- Nntp-Posting-Host: cunixb.cc.columbia.edu
-
- In article <7@zeos.COM> kgermann@zeos.COM (Ken Germann) writes:
- >
- >I would like to clarify that this is my opinion and does not reflect
- >any marketing decision or statement made by my employer.
- >
- >
- >If you are in direct need of the 486-DX50 motherboard now, I would buy it.
- >But, if you are not in direct need of that kind of computing power. I would
- >hold off and buy a 486-33 motherboard. The reason behind this is because
- >the DX2-66 will run faster than the DX50. Most 486-33 motherboards have a
- >66Mhz Oscillator already on them (yes, ZEOS' does). You will be in a
- >better position to get more speed out of your system with the doubler
- >chip. The implementation of a DX2-100 processor introduces some difficulties
- >in meeting the FCC standards for RF interference. The 100 Mhz clock cycle
- >will cause some problems in controlling the harmonics and radio frequencies.
-
- Why? The DX-*2*-100 only has a 100 MHz speed *inside* the microprocessor.
- The speed outside the CPU chip is 50 MHz, just like the DX-50. So, if your
- DX-50 machine meets FCC specs, your DX2-100 shouldn't be that different,
- right? Or is it simply able to wring out a little extra speed from the bus,
- and generates a little more RFI? Of course the DX-50 motherboards have to be
- very well designed to be FCC class B, but are you sure that you can't just
- drop a DX2-100 onto said motherboard, without increasing the RFI?
-
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