no 133mhz bus on PCCHips M598 sis530 version 5 no onboard

Discussion relating to Socket 7 hardware.
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rmay635703
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no 133mhz bus on PCCHips M598 sis530 version 5 no onboard

Post by rmay635703 » Wed Feb 16, 2011 6:59 pm

I am curious how you guys have used CPUCool to overclock the old plain PCCHips M598 that has nothing onboard but sound and video?

In CPU cool the options I am given don't make sense and result in 60mhz, 66mhz, 75mhz, 83mhz, 95mhz and 100mhz operation. (even though CPUcool does not list them as such 133mhz for example is actually 95mhz)

My board is an old version 5, I am wondering if my clock chip is different.

I would very much like to exceed 100mhz bus given the ram I have.

Also I have an Intel socket 7 266mhz MMX CPU for a laptop I would like to use, sadly it won't work on anything but a TX which means I can't overclock much.

I am thinking that the V core pin is in a different location and is attached to a ground or something. Anyone able to find the pinout of the Intel Mobile Socket 7 Pentium MMX 266mhz chip?

Thank You
Ryan

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tazwegion
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Post by tazwegion » Sat Feb 19, 2011 7:34 pm

No doing it the easy way for you...Hmmmmmm? :twisted:


Okay, there is a labour intensive method of altering your clock settings to achieve higher than 100Mhz FSB, ultimately it involves swapping out your PLL reference crystal (see picture below) and installing a slightly higher rated component, I've heard of it successfully being used to re-rate a M571 SS7 (originally a max of 83Mhz).

Image
Image

rmay635703
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Post by rmay635703 » Mon Feb 28, 2011 5:27 pm

Sadly this board has a W83194R-37 but aren't there any undocumented settings?

Also where can I find the REAL pinout of the Pentium 266mmx laptop/embedded socket 7 processor, it fits into the mobo but according to the post reader the board doesn't even enter post just as if there were no CPU. This leads me to believe one of the voltage pins must reside on ground.

Cheers
Ryan

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jsc1973
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Post by jsc1973 » Wed Mar 16, 2011 11:01 pm

tazwegion wrote:No doing it the easy way for you...Hmmmmmm? :twisted:


Okay, there is a labour intensive method of altering your clock settings to achieve higher than 100Mhz FSB, ultimately it involves swapping out your PLL reference crystal (see picture below) and installing a slightly higher rated component, I've heard of it successfully being used to re-rate a M571 SS7 (originally a max of 83Mhz).

Image
That's really not tough to do at all. Several years back, I got ahold of some old Apple PowerBook 3400 motherboards, which were the fastest laptops in the world in their day (1996), but still held back by a 40 MHz bus speed. I popped the PLL crystals off of them and replaced them with 44 MHz crystals, which overclocked the boards from 180/40 to 198/44. That 10 percent increase in bus speed shockingly made those boards as fast as a stock 240/40 model. I always heard the 603e had a terrible design as far as cache and memory access; this exercise made me a believer.

If you can find a two-hole socket that fits the spot for the crystal, you can install that and even try various speed crystals for the fastest possible speed. It takes about five minutes to do this on any board, if you have the parts and the soldering iron ready.
FIC VA-503+, Rev. 1.2, AMD K6-III+ 450@550MHz, 80GB Seagate ATA-100, 3dfx Voodoo3 3500 TV, TB Montego II Quadzilla, Win98se, 384MB PC100

Compaq Presario 1273, AMD K6-III+ 450@400MHz 1.8v, 40GB Samsung 5400RPM, extremely hacked Win98SE, 288 (yes, 288!) MB RAM
(Also an AMD FX-8350, which does the heavy lifting these days...)

DrSwizz
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Post by DrSwizz » Thu Mar 17, 2011 7:32 am

You can desolder two pins from an old CPU LIF socket and use those pins for a socket for a clock crystal.

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