meljor wrote:

Ok, some facts now..... […]
Show full quote

Ok, some facts now.....

Overclocking a (mobile) k6-3+ to a really stable 600mhz or higher is not that easy, it will run etc. but getting it perfectly stable can be a challenge. So overclocking a normal k6-3 to 600mhz? GOOD LUCK getting that stable. 500mhz is about the highest setting you can use, and not all of them can reach that.

Beside all this, the 5,5x multi is a better setting for these cpu's as it is in most cases faster compared to the 2x (=6x). Don't know why! Using the 5,5x 110mhz is perfect for a k6-3+ as it also gives you the higher fsb.

About the voodoo3: some ss7 boards with VIA chipset used a cheaper linear voltage regulator for agp, instead of a switching regulator. On these boards the voodoo3 3000 can be too much, also other high end cards like the TNT2Ultra or Geforce2 Ultra could be best avoided. Using the versions that are a tad slower (but draw less current) like the v3 2000 or Banshee or a normal TNT2 is the way to go on those boards, MX cards draw even less current.

So check what sort of regulator is on your board before using a voodoo3 3000 agp. Pci versions are fine.

Yeah, there was a good reason the fastest K6-2/3 model that was released was 570MHz, and that one was apparently not very stable in the first place. I never saw them advertised, only say reviews back in the days.
I personally run my K6-III+ at 500MHz and that's fine. It's fast enough.

retardware wrote;
I always thought that K6-3+ officially only went to 450MHz and K6-2+ only to 95/570 or 100/550. Never saw a higher chip. Do they actually exist??
Maybe there are chips listed that were announced but never became available?
>>
>>
Could be true for some types, but I just googled for a K6-III+ 550 and there was apparantly one sold via Ebay last november.

Very interesting!
Seems quite difficult to obtain such a processor. Maybe these are some surviving engineering samples?

Regarding the graphics card, it is quite difficult. FX 5500 seems best at the first glimpse.
However, at the second look, when studying the details in wikipedia I am not so sure that the 5500 is actually better than the 5200.

But what matters is the video framebuffer access speed. I don't think the memory interface is much different between these Nvidia generations that use the same type of 50ns RAMs. So I am still in doubt whether for DOS and W95/98 games using a $50 FX 5500 has an actual measurable difference over using a $1 NVS280.

Intel486dx33 wrote:

What I mean by Ultimate is best game compatibility in DOS and Windows 98se.

What I am most concerned about is choosing the best sound card and video card for DOS compatibility, performance and quality.

voodoo 3 and audician-32

Surely after over 1000 posts you would know by now

oohms wrote:

Intel486dx33 wrote:

What I mean by Ultimate is best game compatibility in DOS and Windows 98se.

What I am most concerned about is choosing the best sound card and video card for DOS compatibility, performance and quality.

voodoo 3 and audician-32

Surely after over 1000 posts you would know by now

Thanks.

As for the Overclocking. I am going to leave it a 500mhz. I think this a safe speed and this motherboard does not seem to support anything higher.

The 550Mhz CPUs were probably not released when then manual was written.

The bus speed is there AND the multiplier is there... so it is supported.

I am looking at a PDF of the manual now.

The jumpers and switch settings in the manual you posted are not what I thought they were.. or rather I was just looking at the one page where it isn't very evident what JP7, JP9, and JP10 are for

JP7, JP9, and JP10 are for setting the memory speed divider and SW1 is for setting the CPU multiplier and the bus speed.

And Like I said before, and as others have said, with the newer K6-2, K6-3, K6-2+, and K6-3+ CPUS, these specific multipliers are:
3.5x motherboard setting = 5.5x
2x motherboard setting = 6x

And because there is really only one undocumented setting for the bus speed, my bet is that it is 68.5... so no biggie.

When I set the multiplier to 2x I can only get 5x66mhz giving me 333mhz.
It will not work with 2x100mhz.

Is that speed being reported by the POST screen or are you actually running a program that tells you the actual speed of the CPU?

My guess is that the 2x66 is really 396Mhz and the BIOS is only programmed for up to a 5x multiplier so it is reporting the speed wrong.

And there is no way that setting it to 2x is giving you 5x. The multiplier settings are determined by what CPU pins are being jumpered.

It also makes sense that it won't post at 2x100 since it really is 6x100.

What about 3.5x100. That should give you 5.5x100 which may or may not work with a regular K6-3. At the very least you will need to bump it up to the default 2.4v.

3.5x100 just gives me 350mhz.
What would the SW1 settings be for 5.5x100 ?
The manual does not mention any such setting.
I think I tried all the jumper possibilities and 500mhz is as high as I can get this setup.

I'd suggest this:
First set the JP7,JP9,JP10 and SW1 to K6-2 366. This will give you 5.5x66. Check that it works, it should.
Next rejumper JP7,JP9,JP10 to 100MHz using the table with AGP/DIMM/BUS speeds. There are only two options here really, depening on whether or not your DIMM can handle 100MHz:

1-2, 1-2, 2-3 for 100MHz BUS, 66MHz SDRAM
1-2, 2-3, 1-2 for 100MHz BUS, 100MHz SDRAM

Both should give you 550MHz CPU but obviously if your RAM can take it then the 100MHz will be a bit faster.
Then, once you confirm the CPU works at stock and what the DIMM will handle, set the SW1 to x2 multipier. Use K5 PR133 setting (but only SW1!).

If the mobo boots, you'll have a 600MHz (6x100) CPU. Ignore what BIOS says about it, might be wrong, use NSSI and/or benchmark. The trick here is the CPU itself has no x2 strap, it will interpret this setting as x6 - per AMD's own doc. So that's why BIOS might show incorrect value.

I tried all that and the highest setting I could configure is 500mhz.
5x100.

I think I am going to leave it alone.

I am waiting for some cables so I can finish this build,.

Huh, well that's weird. Your mobo clearly supports 3-bit straps so 5.5 should work. But I just noticed that all 95-100MHz setting have also SW1-6 set to ON for some reason. Did you try that in addition to 5.5 and 2.0 presets on switches 1-3?

deleted

What is the best settings for this motherboard?
AGP ? ( I am using a Voodoo-3-2000 agp card )
SDRAM? ( I am using PC-133 ram )
Cache? ( I have 512kb cache )
CPU bus ?
FSB ?
Clock speed ?
CPU clock ?