Very nice machine! Carefully picked parts, I like it a lot 😀 Not sure about the overclocking though. I'd leave it at 100 MHz.

Like the look of the case as well.

philscomputerlab wrote:

Very nice machine! Carefully picked parts, I like it a lot 😀 Not sure about the overclocking though. I'd leave it at 100 MHz.

Like the look of the case as well.

Thanks 😀

I have never left anything at stock if it was possible to overclock it, never ever. 😀

It diddnt even take 24 hours until the first change in spec! 😜

The Sound Blaster AWE64 diddnt work out, it just diddnt feel right so I moved the original AWE32 into the system, I also installed a "mystery card". If the "mystery card" works out then I will have to replace the CT2760 with the CT3900 I just bought as I need two internal line in connectors but at least it will be a non PNP AWE32. As the CT2760 only has one "CD in" I dont have any CD audio at the moment but if the "mystery card" dosnt work out the CT2760 will stay.

I like it. Very nice build based on a pretty hard to find motherboard! I have to agree with phil though...I would skip on over clocking this.

retrofanatic wrote:

I like it. Very nice build based on a pretty hard to find motherboard! I have to agree with phil though...I would skip on over clocking this.

Thanks!

I will add some more thoughts on overclocking or not as you people are so worried about that! 😈

Running this Intel DX4-100 at 120 MHz (3.45V) puts less stress on the system and runs cooler and more stable than running a Cyrix 586 120@120 MHz (3.6V) and I dont see anyone complaining about that. Or like some unnamed member run an Intel DX4-100 without a heat sink 😉, there we can talk about stressing the system.

When I upgraded the original system to an AMD DX4-100 back in the late 90s I didnt even try to run it at 100MHz as the FSB was already set to 40 MHz because of the AMD DX2-80 I was running before. I actually had the DX2-80 at 2x50 MHz for a while but that did cause some issues with file system corruption which was the whole reason for me hunting down the DX4-100. There is no guarantee that every Intel or AMD DX4-100 is stable at 120 MHz with default voltage but when it comes to the later steppings most o them probably are.

Skyscraper wrote:

Or like some unnamed member run an Intel DX4-100 without a heat sink 😉

😊 What a noob 🤣

An idea because you mentioned CD audio. I don't know if you got an external mixer, but older CD drives have a headphone port at the front. Or you could route the analogue CD audio to the rear if you want.

Im not aware of anyone running the Intel DX4-100 successfully at 120mhz the benchmarks are going to be interesting, make sure you get speedsys/Quake/pcpbench etc, it should perform similar to the AM5x86-133.

Why wouldn't Intel run @120?

I'd say it more improbable that it wouldn't and go so far and say it's possible to find some that would run @150MHz.

Interesting.

Skyscraper wrote:

Thanks! […]
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retrofanatic wrote:

I like it. Very nice build based on a pretty hard to find motherboard! I have to agree with phil though...I would skip on over clocking this.

Thanks!

I will add some more thoughts on overclocking or not as you people are so worried about that! 😈

Running this Intel DX4-100 at 120 MHz (3.45V) puts less stress on the system and runs cooler and more stable than running a Cyrix 586 120@120 MHz (3.6V) and I dont see anyone complaining about that. Or like some unnamed member run an Intel DX4-100 without a heat sink 😉, there we can talk about stressing the system.

When I upgraded the original system to an AMD DX4-100 back in the late 90s I didnt even try to run it at 100MHz as the FSB was already set to 40 MHz because of the AMD DX2-80 I was running before. I actually had the DX2-80 at 2x50 MHz for a while but that did cause some issues with file system corruption which was the whole reason for me hunting down the DX4-100. There is no guarantee that every Intel or AMD DX4-100 is stable at 120 MHz with default voltage but when it comes to the later steppings most o them probably are.

Very good point. I hope it works out.

I thought that it would be a good idea to start out with a benchmark that puts alot of stress on the system... for a very long time! 😁

SuperPi 1M: 6087 seconds, also knows as 1h 43m 27s.

For performance references see this thread.
Post your retro computer superpi results here!

It seems member Tetriums Intel DX4-100 system using the same chipset spent 10960 seconds calculating 1M.

Not the same CPU. Yours is WB (if its the same as my), 20% faster cpu clock and FSB. But even with all this there should be other differences as your result is like 40% faster. Maybe different BIOS optimizations.

kixs wrote:

Not the same CPU. Yours is WB (if its the same as my), 20% faster cpu clock and FSB. But even with all this there should be other differences as your result is like 40% faster. Maybe different BIOS optimizations.

Im guessing my memory and cache settings are tighter. My CPU is set to Write Back L1 cache as you concluded, the onboard 256KB L2 cache is also set to Write Back.

"Toight like a tiger!"

Asus PVI-486SP3 REV 1.21. 40MHz FSB. Cache and memory settings.

Try to enable Slow DRAM refresh. It might give you few % speed increase.

Could you please run these benchmarks?

http://www.philscomputerlab.com/486-benchmark-suite.html

Here is another thread about this board and cpu. You can compare results 😉

Asus 486 mobo PVI-486SP3

Interesting...

In fact, if you configure the board for a 40 MHz CPU (e.g.: AMD DX2/80), the PCI bus is overclocked by default, running at 40 MHz instead of the max. allowed 33 MHz.
This is what makes the board very fast in comparison with other 486 PCI boards, despite the rather poor PCI implementation.

kixs wrote:

Try to enable Slow DRAM refresh. It might give you few % speed increase.

It gave me another 1% memory throughput in Speedsys 😀

philscomputerlab wrote:

Could you please run these benchmarks?

http://www.philscomputerlab.com/486-benchmark-suite.html

I will, just not tonight as its 8 hours and 5 minuts until my alarm clock makes unwelcome noises.

For now here is the Speedsys results. Almost identical to member retro games 100s results.

kixs wrote:

I'd say it more improbable that it wouldn't and go so far and say it's possible to find some that would run @150MHz.

I really would like to see one @150 😀
I'm having a hard time finding one that will run stable at 66x2.
Without having to put it in the freezer before benching, that is 😁