• Please review our updated Terms and Rules here

My Gateway 2000 P5-120 is stuck at 90MHz. What setting fixes it?

There are Intel overdrive cpus designed for socket 5 which would speed you up anywhere from 125mhz to 180mhz depending on which overdrive you use
 
computerdude92 said:
So I just checked on the Pentium 100MHz on cpu-world.com and it supports 1.5x (66 MHz FSB) or 2x (50 MHz FSB)

Seeing the dip switch settings on my mobo, it looks like the only option for a Pentium 100 would be 2x (50 MHz FSB) That makes my board look Pentium 100 is the fastest CPU supported on my board, it says so on the PCB. I

--------------------------------

Would an AMD K5 work?
Click to expand...

Your p120 will run fine at 100mhz and a k5 will also run pr100 as well

Personally I would learn a little about hard wiring the multiplier, I’ve done it on both 486 and socket 5 just wire wrapping the multiplier pin right on the cpu itself

I’ve also had good luck overclock ing the p120 to 133 and Intel overdrives always just work
 
computerdude92 said:
There is no way to set the multiplier to 1.5x on this board. Only 2x/3x and 1x/2x settings are available as pictured. I believe my mobo has the same switch block as Malc does, just no Pentium 120 support.

I see on cpu-world.com that a K6-2 233 with 66 FSB has a multiplier of 3.5x. How does it work at 1.5x?
Click to expand...

That particular chip interperts 1.5x as 3.5x since most motherboards had a 3x limit at the time.
 
BTW I have an overdrive 150 i be willing to offer in trade or sale I guess. Depending where you are in WI might be able to meet you in person, since im right on the boarder in IL.
 
The chipset on your board can definitely do 66MHz. It says so right on the chip. I don't believe that Gateway 2000 sold a computer in 1996 that could only run the P100 at 2x50, and didn't support the P120. Either the switches are set incorrectly or something is broken. It seems switch 6 controls BF pin, so that should let you switch between 1.5x and 2.0x. If nothing happens, then something isn't making contact. It looks like switch 7 and 8 controls the bus speed. Whatever you changed before changed the bus speed from 60 to 50.
 
You have an Intel Advanced/ZP (Zappa). Details:

Intel Advanced/ZP (Zappa)

Intel Advanced/ZP (Zappa) is a motherboard based on the Intel 430FX (PCIset FX Triton I) chipset. Get specs, BIOS, documentation and more!
www.ultimateretro.net www.ultimateretro.net

There are 3 manuals in the download section. From the first MTL Jumper manual (at the end) Change switch block 1, switch 6 from off to on.
 
Your Jumpers and Switches are Likely Incorrectly Set.
The Gateway P5-120 or Intel Technical Product Summery manuals should resolve.
I assume you have the Baby AT form factor installed in this Computer Case.
APPENDIX B : Page 15 —> Switch 6, ON; (Switch setting for 120 MHz)

Switches 7 and 8 —> CPU External Operating Frequency
Default is 50 MHz (both switches OFF);
For 60 MHz ( SW-7 ON; SW-8 OFF)
For 66 MHz (Switch 7, OFF; Switch 8, ON)

The Gateway 2000 series , P5-120 used the early versions of Intel Advanced/ZP (Zappa) motherboard
without the L2 cache parts installed (Gateway cost reduction and believed, at that time, to not be worth $$).
This Intel motherboard used the 430FX chipset (PCIset FX Triton I)

You likely have this BIOS version: AMI 1.00.03.BS0T : Gateway OEM

Intel Advanced/ZP (Zappa)

Intel Advanced/ZP (Zappa) is a motherboard based on the Intel 430FX (PCIset FX Triton I) chipset. Get specs, BIOS, documentation and more!
theretroweb.com theretroweb.com

Later BIOS: AMI 1.00.11.BS0T : Gateway hard disk support up to 8.4GB
A MR BIOS version is available
—
Advanced/ZP : Baby-AT Board
Technical Product Summary (PDF, 36 pages)
 
Last edited:
w9gb said:
Your Jumpers and Switches are Likely Incorrectly Set.
The Gateway P5-120 or Intel Technical Product Summery manuals should resolve.
I assume you have the Baby AT form factor installed in this Computer Case.
APPENDIX B : Page 15 —> Switch 6, ON; (Switch setting for 120 MHz)

Switches 7 and 8 —> CPU External Operating Frequency
Default is 50 MHz (both switches OFF);
For 60 MHz ( SW-7 ON; SW-8 OFF)
For 66 MHz (Switch 7, OFF; Switch 8, ON)

The Gateway 2000 series , P5-120 used the early versions of Intel Advanced/ZP (Zappa) motherboard
without the L2 cache parts installed (Gateway cost reduction and believed, at that time, to not be worth $$).
This Intel motherboard used the 430FX chipset (PCIset FX Triton I)

You likely have this BIOS version: AMI 1.00.03.BS0T : Gateway OEM

Intel Advanced/ZP (Zappa)

Intel Advanced/ZP (Zappa) is a motherboard based on the Intel 430FX (PCIset FX Triton I) chipset. Get specs, BIOS, documentation and more!
theretroweb.com theretroweb.com

Later BIOS: AMI 1.00.11.BS0T : Gateway hard disk support up to 8.4GB
A MR BIOS version is available
—
Advanced/ZP : Baby-AT Board
Technical Product Summary (PDF, 36 pages)
Click to expand...
Thanks for the post, w9gb. I'll see if any of this helps me once I get time to work on the system.

Maybe the BIOS needs updating. Can I still find these ancient versions online?

My BIOS can't recognize some 2GB hard drives even! I'm forced to use smaller drives.
 
computerdude92 said:
My BIOS can't recognize some 2GB hard drives even! I'm forced to use smaller drives.
Click to expand...
As long as your BIOS doesn't crash during detection, you can use XUB or a DDO (Dynamic Drive Overlay) to work around this limitation in software. Then you can use larger drives without issues.

The Retro Web page linked does contain the BIOS version 1.00.11.BS0T with support for larger disks, but for some reason does not work for me with Chromium (selecting the "BIOS" tab shows an empty area). Switching to Firefox works.
 
You must log in or register to reply here.
Back
Top