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*Intel...
**82495DX/490DX DX CPU-Cache Chip Set                           <Sep91
***Notes:...
***Info:...
***Configurations:...
***Features:
o   50 MHz Intel486 DX CPU 
    - RISC Integer Core with Frequent Instructions Executing in One 
      Clock
    - 160 Mbyte/Sec Burst Bus
    - 41 Dhrystone MIPs
    - 11.5M Double Precision Whetstones/Sec.
    - On-Chip Cache and FPU
o   Highly Flexible
    - Supports 128 Kbyte and 256 Kbyte Configurations
    - Complete MESI Protocol Support
    - 32- or 64-Bit Memory Bus Width
    - Synchronous, Asynchronous, and Strobed Memory Bus Protocols
    - Variable Cache Line Sizes and Sectoring
    - Cache Data Parity Option
o   High Performance Second Level Cache
    - Two-Way Set Associative
    - Write-Back or Write Through Cache
    - Zero Wait State Cache Access
    - Concurrent CPU Bus, Memory Bus, and Internal Array Operation
o   Full Multiprocessing Support
    - Implements MESI Write-Back Cache Protocol
    - Low Bus Utilization
    - Automatically Maintains 1st Level Cache Consistency
    - Supports Read-for-Ownership, Write-Allocation, and Cache-to-
      Cache Transfers

**82495XP/490XP Cache Controller / Cache RAM (for i860)       06/05/91...
**82496/491     Cache Controller / Cache RAM (for P5 Pentium) 03/22/93...
**82497/492   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94...
**82498/493   Cache Controller / Cache RAM (for P54 Pentium)    <Nov94
***Notes:...
***Info:...
***Configurations:...
***Features:...
**
**Later chipsets (basic spec):
**440 series:...
**450NX  (?)            06/29/98:...
**?????  (Profusion)    c:99...
**800 series...
*Headland/G2...
*HMC (Hulon Microelectronics)...
*Logicstar...
*Motorola...
*OPTi...
*PC CHIPS/Amptron/Atrend/ECS/Elpina/etc...
**Notes:
You eventually get  to know when a  board is made by PC  Chips just by
looking at it.
 
Here is a test:
1.  No manufacture name, or one of the above.
2.  If the board has a lots of components that sound like a well known 
    part but aren't the well known part. i.e. 'HX Pro' instead of 
    '430HX'
3a. A really good feature set where you think, that's exactly what I'm 
    looking for.
 b. The features don't really work as intended. 
4.  The price is fantastic.
5.  Its disappointing on closer examination.

PC Chips is  renowned for making crap products. Some  are actually not
too bad, they're no worse than  your average brand. However some are a
nightmare either by design or  just poorly made. Fake components glued
on is not  uncommon. Fake labels over other components.  PCB's so thin
they require low insertion force ISA connectors, every trick to save a
few $.

**Early Chipsets:
PCCHIP1           286/386SX Found on: M205/M209
PCCHIP2           386DX     Found on: M321
CHIP3             386DX     Seen on: a 386DX motherboard  c92
CHIP5 (4L04F1282) 386DX     Seen on: a 486DLC motherboard c92
CHIP6 (4L04F1666) [partnered with CHIP5]
CHIP11, CHIP13    486       Seen on: an isa/vlb motherboard c93

**Later Chipsets:...
*SIS...
*Symphony...
*TI (Texas Instruments)...
*UMC...
*Unresearched:...
*VIA...
*VLSI...
*Western Digital...
*Winbond...
*ZyMOS...
*General Sources:...