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Site
Almost Everything You Need to Know About Your
Packard Bell Computer
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This site made with this PB
Updated January 10, 1998
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Packard Bell 790 System
Type
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Contact Me especially if you have information
that I may want to add.
The motherboard
The motherboard is the center of any system, because it will determine
what components your system will support. Everything from the CPU to your
sound card is connected to the motherboard. The identification of which
board is in your system is the key to answering questions relating to your
system.
This page is dedicated to the PB 790 system types. The 790
is one of the new ATX style cases that Packard Bell is selling. Pb is using
tNEC motherboards in some of thier sytems, does anyone know if this is
one of them?
Which motherboard
do you have?
To find out your motherboard type, visit my
motherboard page.
PB 790 Motherboard Diagram -
Chipset
Motherboards are affected by the chip sets used on them; these chip
sets determine how your computer uses data and what hardware your system
can support. The 790 Motherboard has a Intel 82430TX dual PCIset
(MTXC and PIIX4) that provides memory/cache control, PCI bus control,
ISA bus compatibility, and Local Bus IDE support.
The BIOS (Basic Input Output System) is essential to operate your computer;
it provides the basic instructions that allow your computer to boot up.
To learn more on BIOS try this page called Bios
Information. BIOS installation can be risky, so please research this
issue before you try anything. Here is a link on how to install bios:
Synchronize your
system's clock
The CPU
The CPU is probably the central part of the computer; it does most of
the work. There are several types of processors on the market today. Intel
is the leader with their successful Pentium Processors. Intel has just
introduced a new Processor called MMX. Click here to see the insides of
the Pentium
chip (Large Graphic File). Has any one used any other processors (AMD,
Cyrix) on this motherboard?
WHAT CPU CAN I PUT IN
MY PB PENTIUM?
The following chart shows the CPU's that you can have in the PB 790
motherboard. The chart is accurate to the best of my knowledge; please
notify me with any inaccuracies.
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Jumper settings for PB 790 Systems to change the CPU
CPU
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J9C1-C |
Clock Frequency
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J9C1-D |
Clock Frequency Multiplier |
90 |
4-5 |
60 MHz Bus Speed |
1-2, 4-5 |
1.5X Clock Frequency Rate |
100 |
5-6 |
66 MHz Bus Speed |
1-2, 4-5 |
1.5X Clock Frequency Rate |
120 |
4-5 |
60 MHz Bus Speed |
2-3, 4-5 |
2.0X Clock Frequency Rate |
133 |
5-6 |
66 MHz Bus Speed |
2-3, 4-5 |
2.0X Clock Frequency Rate |
150 |
4-5 |
60 MHz Bus Speed |
2-3, 5-6 |
2.5 X Clock Frequency Rate |
166 |
5-6 |
66 MHz Bus Speed |
2-3, 5-6 |
2.5 X Clock Frequency Rate |
200 |
5-6 |
66 MHz Bus Speed |
1-2, 5-6 |
3.0X Clock Frequency Rate |
233 |
5-6 |
66 MHz Bus Speed |
1-2, 4-5 |
3.5X Clock Frequency Rate |
Jumper J6M1 should be
set on pins 1-2 for Standard Voltage and 2-3 VRE Voltage.
OVERCLOCKING
Memory
Video Memory
This motherboard supports 2MB video memory, as 60ns SGRAM soldered
onboard and is not upgradeable.
Cache
Memory Upgrade
This motherboard has 256KB or 512KB of Pipeline Burst static RAM (PBSRAM)
onboard, depending on the system you purchased. I do not think it
can be upgraded.
Adding RAM
The PB 790 system features twin 168-pin DIMM sockets located at
(J5F2-Bank 0) and (J5G1-Bank 1) on the motherboard.
These sytems may be upgradeable up to a total of 256MB with 168-pin
3.3V DIMMs with tin-plated contacts. You can use only 60ns unrestricted
CAS Latency 2 unbuffered 4-clock SDRAM DIMMs or 60ns buffered or unbuffered
EDO DRAM DIMMs.
"Memory type, size and speed can vary between sockets; accordingly,
SDRAM and EDO DRAM can both be installed on the motherboard. However, please
note that SDRAM DIMMs with an nx4 DRAM base and parity DIMMs (x72) are
not supported by the system."
UPGRADE TABLE
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Video
I am not sure of the video card yet.
Hard Drive
The Hard Drives on Packard Bell Systems are not uniform, each PB 790
motherboard can have a different size and manufacturer of the hard drives.
If you want more information I suggest you contact the individual manufacturer
of your hard drive.
Get you own PB 790 manual
Copyright © 1998 Ray's
Packard Bell Web Site; all rights reserved.
For a list of all my web pages or frames-free viewing see my Site
Map.