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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!spool.mu.edu!wupost!csus.edu!netcom.com!tiger
- From: tiger@netcom.com (Tiger Zhao)
- Subject: Re: 486SLC Cyrix and Am386SX
- Message-ID: <1992Dec15.065317.26048@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <Bz9Gop.6Iv@news.cso.uiuc.edu>
- Date: Tue, 15 Dec 1992 06:53:17 GMT
- Lines: 37
-
- ychou@uxa.cso.uiuc.edu (Chou Yen) writes:
-
- >I was wondering if it would be possible to upgrade just my processor
- >to one of these newer processors that are built on a 386SX/286
- >motherboard...
-
- Most existing 386SX motherboards use surface mounted type CPUs
- called PQFP (Plastic Quick Flat Packaging). And those 386SX CPUs
- are not easily removed without some special soldering tools.
- So, most of the 386SX motherboard are not upgradeable to 486SLC
-
- >Is the 486SLC Cyrix on a 386SX board or a 386DX board? And is the
- >Am386SX much faster than a standard 386SX (fast enough to be worth
- >the upgrade rather than to wait longer for a whole new machine)?
-
- The 486SLC Cyrix CPU is for existing 386SX motherboard. (486DLC CPU
- is for 386DX motherboard) which is internal 32-bit, and external
- 16-bit with 1k internal CPU cache. A SLC motherboard is normally
- 2.5 times faster than a SX motherboard (for the same clock speed).
- For example a 386SX-33MHz motherboard gives you 37MHz on Landmark
- speed test version 2.0, while a 386SLC-33 motherboard outputs
- 106MHz, (386SX-25: 28MHz vs 486SLC-25: 86MHz on Landmark v2.0).
-
- >And lastly, where could I have an upgrade of this sort done? And
- >about how much would it cost?
-
- You can get a whole motherboard with user manual for about $170-250,
- on 486SLC-25MHz, or around $190 or up, you can get a 486DLC-33MHz3
- motherboard.
- If you not able to locate a good priced supplier, here is my
- recommendation:
- Contact Athena Microsystems Inc. their price are the lowerest
- I found so far: $170.00 for 486SLC-25Mhz motherboard, and $199.00
- for 486SLC-33Mhz motherborad (comes with AMI BOIS).
- Phone: +1 415 962 8686, FAX +1 415 969 3361
-
- Tiger
-