This guy seems to be selling one, but it looks pricey. Maybe send him a lowball offer, see how he responds

Note that memsys is in the Netherlands, so shipping costs are also a consideration.

Regardless, though, I wouldn't even waste my time making an offer on that... I see those lower-end Asus Socket 7 boards on eBay all the time for $20 or less. The P55T2P4 tends to go for more, but the 430FX/TX ones are all over the place.

Robin4 wrote:

Someone elses.. I was lazy to put the orginal picture on the forum.. […]
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TheMAN wrote:

Robin4 wrote:

CT3900 AWE32 for my 486 build with 8 MB ram […]
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CT3900 AWE32 for my 486 build with 8 MB ram

is that your pic or someone else's?
seeing which particular mixer and CSP chip the card in that pic uses, I'm willing to bet it has the buggy 4.12 DSP

Someone elses.. I was lazy to put the orginal picture on the forum..

Where do i find those chips?

Oh i see, i checked it and its 4.13 DSP. I hope this means any good?
With mixer CT1745A-TBP

ok cool, should be ok then
here is mine (got it many years ago)... newer CT1745A-S mixer chip and CT1748-SBP CSP chip... 4.13 DSP... the card has been revised too... there's the green jumper wires on the front and back... card says 1995 instead of 1994

I haven't really experienced any hanging note problems with mine, and with the newer mixer chips, it's pretty quiet for an ISA soundblaster

Iam going to putt a NEC Wavetable board on it en put it in the 486 system.
My system would like:

AMD-X5-133ADZ (easly can run doom on it!)
Dont know the brand of the motherbord, but have 8 x 16-bit slots and 3 VLB slots..
32MB 72-pin EDO ram..
Think iam going to use the Diamond Speedstar VLB 4MB graphics card..
Iam have also a SIIG 8,4GB IDE I/O controller card over here..
But i also can use a DTK PTI-255W V1.2 VLB (dont know if it would support large drives.
Guess I using the Roland SSC-1 in it or the Roland MPU interface and connecting it with a MT-32
Creative AWE 32 CT-3900 soundcard with upgraded ram to 32MB With NEC X385XG daughter board.
And definitely going to use also a Gravis ultrasound MAX with MAXed ram..

Harddisk and CD-rom drive i still dont know.

Six P55C 233MHz Pentium MMX for a little overclocking experiment 😉

Got two of these from the US:

It has DVI under DOS and also a NTSC BIOS, which means I can now capture smoother S-Video videos 😀

Mau1wurf1977 wrote:

Got two of these from the US: […]
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Got two of these from the US:

It has DVI under DOS and also a NTSC BIOS, which means I can now capture smoother S-Video videos 😀

But what are they?

Looks like a GeForce FX5200 PCI.

Mystery wrote:

Looks like a GeForce FX5200 PCI.

Not with the little tab at the back. Those are AGP.

Yes, AGP of course. Didn't get much sleep last night 😉

Mystery wrote:

Six P55C 233MHz Pentium MMX for a little overclocking experiment ;)

What overclocking experiment? The fastest I could reliably get my P233MMX was 262 MHz (75 x 3.5). I was hoping for 292 MHz (83.3 x 3.5), but the machine didn't even turn on. With 6 pieces to choose from, maybe one will reach 292 MHz.

Yep, something like that.

In this thread people have successfully overclocked the 233MMX to 300 or even 333MHz: P55c at Overclocked to 300mhz?
Here I've taken the mobile version (Tillamook) to 450MHz (without L2 cache): P55c at Overclocked to 300mhz?

300MHz isn't that hard to achieve, but you usually have to increase the voltage to pretty dangerous levels in order to get the system 100% stable in DOS and Windows.

I got the first two CPUs today and will hopefully recieve the rest tomorrow. The first tests have been pretty interesting so far. I'll revive the 300MHz-topic once I've tested the four remainig CPUs 😀

I don't usually like to over-volt more than about 0.3 V on these CPUs. Please let me know if you find any which run at 292 MHz and are stable enough to install Windows and play Quake 2. As for the Tillimock's, I don't see much point in running them with L2 cache disabled, even if they run stable at 350 MHz.

Well the only way they'll even boot (at any clock speed) is with the L2 cache disabled. There's no other way in a desktop system since the cache doesn't work with most desktop chipsets. Some boards don't boot even with L2 cache disabled.

At 450MHz it's slightly faster than a 300MHz 233MMX with L2 cache enabled.

I'd prefer the L2 cache to be enabled as well, because the performance should be a lot higher even if the overall clockspeed went down. But as far as I know, nobody has gotten a Tillamook to boot with L2 cache enabled in a desktop system.

Edit: I'll let you know if I find anything interesting while keeping your 0.3V limit in mind 😀
I don't like putting that much juice through a CPU either, so I'm trying to find a good specimen that'll work at high speeds without insane vcore.

Is Quake2 running too slow at 266MHz for you?

I'm not sure how you are running your non-Tillimock P233MMX at 266 MHz. I cannot go above a 3.5 multiplier, which means it is running at 262 MHz. Quake 2 software mode gets 13.7 FPS, and using default OpenGL and Matrox Millennium G200 16MB, it gets 25.1 FPS

For 300 MHz, expect 14.7 fps in software mode, and 27.4 FPS default OpenGL.

These are results with a 430TX board and Win98SE. 640x480 in Quake, 8-bit off.

Oh I'm not running mine at 266MHz, my board just reports settings like 3.5x75 as 266, that's why I automatically wrote 266 😀
I can't go above the 3.5 multiplier either.

I've seen some 75 MHz buses that actually were at 75.6 MHz, which would make the CPU frequency 264.6 MHz. Now, if you're at 76 MHz, I can see the CPU being run at 266 MHz, but I agree, your BIOS is probably using a look-up table and automatically spitting out 266 without much thought.

sliderider wrote:

But what are they?

I'. actually not 100% sure 😀 Might check with a Linux Live CD.

Mau1wurf1977 wrote:

sliderider wrote:

But what are they?

I'. actually not 100% sure 😀 Might check with a Linux Live CD.

It seems to be a Nvidia FX5200...

feipoa wrote:

Mystery wrote:

Six P55C 233MHz Pentium MMX for a little overclocking experiment 😉

What overclocking experiment? The fastest I could reliably get my P233MMX was 262 MHz (75 x 3.5). I was hoping for 292 MHz (83.3 x 3.5), but the machine didn't even turn on. With 6 pieces to choose from, maybe one will reach 292 MHz.

From my experience most do hit 292 just fine but it comes down to how well you cool them and what voltage but the buck stops with the board. 2.9-3.0v is usually the sweet spot for me at these clocks.

Got this CD-RW for my Pentium 3 box

For $10, a full bargain 🤣