I will, no problem, probably I'll take it tomorrow (22.07.2022). Also, this mobo has an odd issue, when cmos battery is either dead or not plugged in this mobo does not want to start at all unless I'll leave it powered on (power cord plugged in and PSU switch on position 1) for some time. And what does that string mean? I mean I did update it ONCE when I got it in 2013 or 2014. 😁

EDIT: Ok, so AMD K6-2/366 works but I have Windows protection error, what's that crap? Safe mode works and FIX95CPU_V3_FINAL.ZIP fixed it. 🤣

Will this work? I really wanna max out that mobo. 😀
https://www.ebay.com/itm/274825467551

haker120 wrote on 2022-07-24, 19:53:

Will this work? I really wanna max out that mobo. 😀
https://www.ebay.com/itm/274825467551

Yes, this K6-2+/570 will work fine. And if you later want to put it in a super socket 7 board, you can easily reach 600MHz.
However, in your TX97-XE board, it will be limited to 500MHz. So any K6-2+/450 or faster will do because these K6plus CPUs can all be overclocked by at least 50MHz. 😉

That CPU is on the way then just please tell me correct settings and won't be a problem it's modded to be K6-III+? 😀

I would start to set the K6-2+/570 at 6.0 x 75 (450MHz) at 2.1V Vcore.
If this is stable, you can try 6.0 x 83 (500MHz) later on, also at 2.1V Vcore.
Use these jumper settings:

CPU External (BUS) Frequency:
75MHz -> FS0: 1-2, FS1: 2-3, FS2: 1-2
83MHz -> FS0: 2-3, FS1: 1-2, FS2: 1-2
CPU to BUS Frequency Ratio:
6.0x -> BF0: 2-3, BF1: 1-2, BF2: 1-2
CPU Vcore Voltage:
2.1V -> VID0: 1-2, VID1: open, VID2: open

I don’t know if this board has an undocumented 2.0V setting, so use the 2.1V setting instead.
These settings are the same for a K6-2+ or K6-III+ CPU.

About the 83MHz Bus Frequency (FSB):
The maximum multiplier on the K6plus models is x6 so without overclocking the FSB you can run at 400MHz (6x66) tops on this TX97-XE. Usually, overclocking the FSB to 75MHz works fine on these i430TX boards, enabling you to reach a 450MHz CPU speed. Some people even got the FSB up to 83MHz for a 500MHz K6-2(+)...
The patched BIOS supports these 6x75 and 6x83 settings and will indicate the correct 450 and 500MHz CPU speed.

Maintaining stability when overclocking the bus above 75MHz on an i430TX system like this largely depends on the PCI devices used.
As you probably know, a higher than 66MHz FSB exceeds the chipset and PCI specifications, because the 430TX chipset uses a fixed 2/1 divider between the FSB and PCI bus clock. Normally, the PCI runs at 66/2 = 33MHz.
When running at 83MHz FSB, the PCI is automatically overclocked to 83/2 = 41,5MHz. This is a 25% increase above the norm.
Busmaster cards, like SCSI-Controllers or networking cards are especially sensitive to frequencies over 33MHz. But 37.5MHz (FSB 75) is usually oke.

So a CPU speed of 450MHz (6x75) should be oke but 500MHz (6x83) may give stability problems.
Note that running a K6-2+/570 at the 500MHz (6x83) setting will not damage the board or CPU but if it is not stable, it may corrupt the data on the harddisk...

Because the IDE ports are also PCI devices, the timing on the IDE channels is also 25% too high at 83MHz FSB. Modern ATA66/100 harddisks can take this but for a non-UDMA CD-ROM it may be too fast. But setting the IDE PIO mode in the BIOS on the CD-ROM channel to Mode 3 should help in this case (INTEGRATED PERIPHERALS menu).

Hope this helps,
Jan

@Chkcpu, thanks a lot mate, I'll let you know if that works right after I'll get that processor. 😀

That cpu you ordered can be modded to a k6-3+

Btw, if it hasn’t been mentioned 2x = 6x

SUCCESSFUL K6-2+ to K6-3+ Full Cache Enable Mod

I've read this but I don't fully understand, it's to delid processor and to move just one zero ohm resistor? Or second one as well, the one that changes some number? I'm not that technical. 😁

Just move the one. Then reinstall the lid.

I got 3 AMD K6-2+/570, 2.1V, FSB83 6x and POST sees 500MHz and Win95 OSR2 works rather stable, some time in DOS games and nothing happened so success? 😁

Yet either Quadro NVS280 or GeForce FX550. 😁

so the quadro and 5500 works? :p

sweet!

you set voltage to 2.0v?

sounds good 😀

gonna mod them?

I don't have both GPUs yet, one already in EU, second sent from china so I'm waiting. 😀

Do I have to mod it for this build? Will I notice anything? I asked my good acquaintance to mod at least one of them for Super Socket 7 mobo I got but with this one I'm really not sure. 😁

And nope, I set 2.1V as @Chkcpu adviced. 😉 I'm worried 2.0V won't work with this mobo and I'll damage something.

Okay, you have the TX97-XE running stable at 500MHz, Great!! 😀
Enjoy this nice K6-2+ system!

Cheers, Jan

Yep, it does but... is my maths broken? I thought 83 * 6 = 498. 🤣

Haha, your math is fine. Luckily FSB83 is actually 83.3MHz! 😉

That explains a lot. 😀

And will I gain anything in this build after cache mod?

2.1v is fine 😀 yep 83x6 is approx 500

You can build this as is of course with 128k

The 256k of a unlocked cpu can be a nice improvement.

The thing is if 256kb will change something with this build, sure, I may ask my good acquaintance with great soldering skills to do this for me and I'll mod all 3 processors but if not then I see no reason for this build as I still need to build PC around DFI K6XV3+/66 512. 😀 As I have mobo, I got processors (that wait for mod), I ordered 3x256MB RAM sticks (I hope mixed brands are no problem as seller had only one speed of those just various brands if any). And I have case I can use (removing Sempron based AshRock K8NF4G-SATA2, I mean I have slooooow Sempron there) and GPU like Voodoo 3 either 2000 or 3000 or GF4 Ti 4200 64MB I dunno yet. 😁

It’s up to you, the 3+ is typically a little faster.

https://www.philscomputerlab.com/amd-k6-2-vs- … -vs-k6-iii.html

Sometimes you can disable motherboard cache for even more performance. But that varies. (You’ll have to test both ways)

Alright, I already got Quadro NVS 280 PCI and Win95 has a problem with it but wotks, some missing files, I started new topic for this and I'm waiting for FX5500 PCI yet. 😁