idan182 wrote on 2022-03-23, 18:46:

I changed J8 to J15 and the voltage to 2.8v […]
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I changed J8 to J15 and the voltage to 2.8v

It seem that if I connect my CF Drive it does that.
It won't recognize it at all, not in Primay IDE, and not Secondary. either Master or Slave.

20220323_211735.jpg

I managed now to get the MASTER and SLAVE working. HD is Master, CDROM is Slave.
my DOS and everything is on the CF Card so I don't have a way to check but it does boot fine now until disk boot failure please insert disk and press enter.
Any suggestions for new CF Drive and not this Chinese?

why do I see 266mhz on post if my cpu is 233?

Happy to hear it works better.😃👍

The CPU speed on those old processors is not fixed. It is determined by the front side bus (or FSB: the interface between CPU and northbridge/mainboard) and the multiplier.
-Your FSB is set to run at 75MHz.
-Your mainboard is configured to tell this CPU to run at 3.5 times the speed of the FSB.
This will result in your CPU running at 262MHz (75x3.5). The BIOS reports this as 266MHz.
This is a slight overclock but usually it should not cause any issues.

Does this make things clearer?

Doornkaat wrote on 2022-03-23, 17:38:

That's a regular 233MHz Pentium MMX. It is supposed to be run at 2.8V. Change the J8 to J15, set the voltage jumper to 2.8V and […]
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idan182 wrote on 2022-03-23, 17:36:

OK so I took the cpu off and its 266MMX 2.8V standard
Is it rare? Can I run it in 3.38v then?

That's a regular 233MHz Pentium MMX. It is supposed to be run at 2.8V.
Change the J8 to J15, set the voltage jumper to 2.8V and see if that fixes your stability problems.😃

It's not particularly rare or valuable I'm afaraid but on the upside it probably didn't get damaged from being overvolted like a Tillamook would probably have.👍

this^

233s are very common. 10-20$

did you figure out your cooling solution?

these old cpus as others said run at the speed the mobo tells it to. unless it doesn't support the set multiplier.

As others and I have said you appear to be running at 75 x3.5 which is overclocked but no problem as it's probably within the capability of the chip if you keep it cool. chances are 262mhz will be stable. I'd leave it as is. but do some benchmarks to be sure. those chips usually top out at 270-300mhz

2.8v as others have said is the correct voltage for the chip you sent a picture for.

thank goodness it wasn't a tillamook 🤣. "bzzzzzzt!" Also, darn that it wasn't a tillamook 🤣

you need to change jumper settings every time you swap your cpus. do not forget. you got lucky.

THANK GOD
it was this chinese junk CF card along with this CF to IDE thing:

I bought this from Amazon:

And it works and everything recognize on post now!

All the storage that was on the CF card got deleted! now it asks me to format it. huh
So good I have backup.

idan182 wrote on 2022-03-29, 18:05:

THANK GOD it was this chinese junk CF card along with this CF to IDE thing: […]
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THANK GOD
it was this chinese junk CF card along with this CF to IDE thing:

I bought this from Amazon:

51TH9EnGfOS._AC_SL1200_.jpg

And it works and everything recognize on post now!

All the storage that was on the CF card got deleted! now it asks me to format it. huh
So good I have backup.

I’ve had nothing but issues with cf on pentium IDE boards

Just go sata and be done with it.

Get a promise tx4 sata II

Sd to ide also works well

Deksor wrote on 2022-03-21, 09:47:

Hi, could you please take a good picture of your motherboard without anything hiding it from the camera (expansion cards, cables, etc) ?

I'd like to add the picture to the ultimateretro page https://www.ultimateretro.net/en/motherboards/5042

Also a BIOS dump could be interesting if yours is different from the one we have online 😀 (use uniflash to dump it)

Let me know if you need photos of TX3 as well.

Well apparently a picture from you have been added a while ago https://www.ultimateretro.net/en/motherboards/5041

However if you can make a better one (and one for the back of it), then please do it 😀