VOGONS


First post, by Munx

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Hello everyone,

I'm having trouble with setting the voltages on this SS7 motherboard.
Let me tell you the whole story...

This motherboard came with a whole PC and a K5 PR100 (100MHz) already installed. It powered up fine and I was able to do some quick testing. The case was in horrible condition however, so I got rid of it. The motherboard with the CPU just went into a different case, no changes. I then upgraded to a PR133 (also 100 MHZ) and it also worked great. Made no multiplier or voltage changes, since both PR100 and PR133 run on the same speed, FSB and 3.5V.

Now I want to make another upgrade to a Pentium MMX 233. When I checked up on the switches to set the voltage to 2.8V I noticed that it is already set to that. I have not made any changes to them and BOTH K5s ran just fine.

The manual here states that these are the correct switches (7-8-9-10 set to 0-0-0-1)
http://www.udo-richter.de/DFI/index.en.html

I'm very skeptical that I won such a silicon lottery of 2 K5s that run stable @ 2.8V. Could this be a motherboard fault or am I looking at an incorrect manual?

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My builds!
The FireStarter 2.0 - The wooden K5
The Underdog - The budget K6
The Voodoo powerhouse - The power-hungry K7
The troll PC - The Socket 423 Pentium 4

Reply 1 of 4, by jaZz_KCS

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Does the board have CPU voltage safety controls of any kind? I have a Gigabyte board that uses such a DIP-switch board for the voltage selection as well, but it reserves the right to substitute for its own values if the value detected is too far off the voltage required by the processor.

Reply 2 of 4, by dionb

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Is there a single voltage / split voltage jumper/switch? If there is and it's set to single, any settings for split CPU voltage will be ignored. I doubt that K5 could run on 2.8V, but 3.3V seems pretty plausible.