VOGONS


First post, by BitWrangler

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Heya Vogons,

So it frequently comes to my mind in other motherboard threads, that 430TX boards, even with SDRAM only, seem not as reliably able to use 83Mhz speeds as 430VX and 430HX boards. In fact they seem more on a par with the older FX for this.

I don't know if it's because I've had some particularly lose-y silicon lottery tickets in my 430TX boards or whether it is a general thing.

So the one I had most experience with was the Octeck Rhino 20+ ATX board, and despite using 100Mhz capable K6-2 class, and PC100 rated RAM, I was never able to get 83Mhz stable on low multipliers, and run say 5x83, so I ran at 6x75. This was with a V3 PCI mostly, and a TGUI 9680 confirmed to run at 83/41.5 PCI on another board.

Some suggest that it's typically the DMA33 IDE controller that messes things up. There could be something in this, as I think it's used on Slot 1 440LX boards also, which seem hit or miss doing 83 as well, although in my samples, it's more 50/50 whereas the TX is more zero for three.

What do you think folks, is this effect real, or have I been super unlucky with my TX boards?

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 1 of 4, by Repo Man11

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My experience has been that I've setup three different Asus TXP4 motherboards with K6-2/3+ CPU and the 83 MHz FSB with no issues at all. I've never had a VX board that had jumpers for anything above 75 MHz, so no experience there. And I think I've had three or four P55T2P4s that I've setup with K6-2/3+ CPUs and the 83 MHz GSB with no issues.

"We do these things not because they are easy, but because we thought they would be easy."

Reply 2 of 4, by the3dfxdude

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I used to run a k6-3 on a 430TX chipset back in 2000? at the 83Mhz FSB. I don't remember any stability issues. I still have the board, and a few VIA boards others now.

Reply 3 of 4, by GeorgeMan

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Hi, I have a QDi Titanium IIIB. It has a completely jumperless design, everything is handled by the SpeedEasy menu in BIOS. Originally it only had up to 75MHz support, but after some work from Jan Steunebrink we were able to include support also for 83MHz FSB among other things.
Since then I'm running my P233MMX at 83x3=250MHz without any issue so far.
I've not thoroughly tested the IDE controller, can you suggest some action that would cause a mess for me to explicitly try?

So far general DOS & Win 98SE lite usage is fine. Keep in mind that I'm using real IDE HDDs (up to 80GB after the beta BIOS from Jan) and not any weird converters, adapters, SSDs etc.
I very like this board because of the lack of jumpers, I can slow it down as far as 386-25 levels and many in-between with ease, ie without opening the computer case or hacking the jumpers to switches.

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Reply 4 of 4, by BitWrangler

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GeorgeMan wrote on 2024-09-20, 07:24:

So far general DOS & Win 98SE lite usage is fine. Keep in mind that I'm using real IDE HDDs (up to 80GB after the beta BIOS from Jan) and not any weird converters, adapters, SSDs etc.

It's possible I have to revisit the board with an ATA66, 100, or 133 capable drive, because I may have had only a 33 drive on it when I was last seriously messing. So could have been the drive, not the controller.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.