Afaicr the C3s don't have smp support.

I don't know whether you have already read these 2 pages, it's got some of the info bunched together.

I'm not sure I'd want to overclock a C3, but if you manage to get it stable, feel free to give us some SuperPi benchie results 😀.

What is your intent with this system you are contemplating? If it's gaming, please keep in mind the C3s weren't really the fastest things available in s370 😜.

Tetrium wrote:

Afaicr the C3s don't have smp support. […]
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Afaicr the C3s don't have smp support.

I don't know whether you have already read these 2 pages, it's got some of the info bunched together.

I'm not sure I'd want to overclock a C3, but if you manage to get it stable, feel free to give us some SuperPi benchie results 😀.

What is your intent with this system you are contemplating? If it's gaming, please keep in mind the C3s weren't really the fastest things available in s370 😜.

I'm not quite sure what I'd do with it.
I know there not the best cpu, I just thought it be a cool build.
Also there are lot of superpi subs over at hwbot with c3 cpu's. Oddly I can't get my be62 to work with and s370 cpu's anymore. I don't know why, but I must of broke something, this is my bench setup.
Once I'm done benchmarking my 750mhz piii I'll get back to the 700mhz c3. Ohh and I have the 750mhz piii at 1065mhz superpi 32mb stable.

Edit
Thanks for the links, will be useful.

I think these are interesting chips (and they look kinda cool too 😁).

If you're already running a VIA, then you are probably already aware that these chips are a bit taller (but not as tall as Tualatin iirc), which could make mounting certain HSFs a bit difficult (especially newer sA HSFs), because of the force applied to those little socket tabs.

When it comes to performance, I'd rate them roughly as a Coppermine-Celeron and then divide that through about 2.5 or so, so I would treat it like it was maybe something like a K6-3+ 500MHz or so, but on a newer motherboard with benefits like AGP 4x, more boards to chose from, (usually) no jumpers, usually more choices when it comes to mounting bigger heatsinks.

And about your testbench board...what exactly happened and in what order?
You "could" opt to reset the CMOS, perhaps it's got something to do with that? (I just take out the battery and leave it there for a day or more).

Well its a hardware problem as far as I know . I was over volting the C3. I had it set to 3.5v in the bios witch worked fine. I had a large heat sink with liquid copper TIM with a 150cmf delta on the cpu and a 100cfm delta on the VRM so heat was not a big factor. Then I set the jumpers on the sloket to 3.8v and the system would not boot. I did a cmos wipe and it still did not work, so I set the slotket jumpers back to the stock settings and did anther cmos wipe. Now no matter what sloket or s370 cpu I use I can't get any s370 cpu's to work with the board. I can use slot 1 cpu's with out any problems. I done a cmos wipe and everything. Like I said I'll take a deeper look at it once I'm done with the 750mgz PIII.

OH and I got that 750mhz PIII ruining superpi stable at 1.1ghz. it's a nice little chip.

EDIT:
Sorry for me wording/grammar I know it's not the best.

Anyway I think a full via system would be cool, as far as power goes it would be fine for me. If not I'll just overclock it. I'm sure I could get a 1.2ghz c3 to 1.4-1.5ghz stable and not so over volted that it would be hard on the cpu.I'm sure my 700mhz tbird would smoke it, but the tbird would be a lot more boring.
I'd probably just be playing games the need a mmx pent or pent2 at the most, maybe UT99 abit and MW4 a little along with office work like word and what not. The only thing I'd be worried about would be networking. I need a good PC to submit benchmarks score to HWBOT. The 700mhz Tbird system I have does that grate, but I'm not so sure about the C3. The 130mm FSB and ram would help, but... I don't know.

You really ran 3.8v on that thing? 😲

And I suppose I could call your wording to be of better quality than your overclocking skillz 😁 So no worry, many people here aren't native English 😀

Personally I typically never bother with overclocking as I personally prefer stability over speed. If I really wanted something faster, I'd just build a faster rig 😜

The be62 was set the voltage 2 3.2v stock. Whether that was right or not I don't know.
I kind of went head first with the cpu.
As for overclocking, I do it for benchmarking.

3.8v is a Lot and that likely killed something if you can't get anything to work with that board after a cmos wipe, got a spare board to work with for testing?

nforce4max wrote:

3.8v is a Lot and that likely killed something if you can't get anything to work with that board after a cmos wipe, got a spare board to work with for testing?

The board more the works, just can't get s370 cpu's working. But I did not really try that hard ether. I'm sure I'll get it fixed.

On that tears it. I just got another dud slot A board... Gerr.
I'm going full via.

I tried a ASUS CUV4X board with a couple of C3's, the 866MHz worked but BIOS I.D'd as a Pentium II, the 1.2GHz didn't work.
Oddly the best motherboard I have fround for C3's so far used a SiS chipset! 🤣

BSA Starfire wrote:

Oddly the best motherboard I have fround for C3's so far used a SiS chipset! 🤣

It did not explode???

BSA Starfire wrote:

I tried a ASUS CUV4X board with a couple of C3's, the 866MHz worked but BIOS I.D'd as a Pentium II, the 1.2GHz didn't work.
Oddly the best motherboard I have fround for C3's so far used a SiS chipset! 🤣

Which one? And what chips worked on that board?

So far the only SiS chipsetted s370 boards I ever seen, was with the 630 chipset? One of them already had a single bulging cap when I got it, but I kept both of them (I think they were OEM boards, PB or similar).

via c3 nehemiah motherboard compatability

Yes it is 630 Chipset. Works fine with both Nehemiah & Ezra, should be fine with earlier C3's too I think. BIOS notes mention even Cyrix III.

Best,
Chris

P.S. no it didn't explode!!! 🤣

Got to say though that the best VIA CPU setup I have found is either the EPIA 10000 http://techreport.com/review/5182/via-epia-m10000-platform
Or the VIA C7 1500 MHz PCM7E PC2500 http://www.theinkco.co.uk/index.php/bargains/ … o-graphics.html. These are both surface mounted VIA CPU solutions. I have found that building a VIA CPU sytem in any other way is a total pain. Although the C3 866 MHz does work fine in Asus CUSL2(intel 815E chipset), detects properly and gets correct voltage, BUT it's much slower than a Celeron Mendocino 466 MHz in that same board, so not really a good option as it should I think be quicker than that.
Sadly I think that most boards that were build to support the C3 were low-end and have long since been scrapped or died. I only got that SiS ECS board because a UK seller has a large number of new/old stock ones, and even at that the first one i got was dead so was replaced.

Best of luck!

Chris

BSA Starfire wrote:

I tried a ASUS CUV4X board with a couple of C3's, the 866MHz worked but BIOS I.D'd as a Pentium II, the 1.2GHz didn't work.
Oddly the best motherboard I have fround for C3's so far used a SiS chipset! 🤣

Dang I was going to pick up a CUV4X for the system.

They are a nice board, mine is setup with a Pentium III 933 MHz and Voodoo3 2000 AGP, it's great, but VIA CPU's are a no go. I thought the same as you, VIA chipset will sing with C3, not the case in this senario. Even to the point the board has VIA CPU jumper where the pins are not present.
Be nice to build a VIA C3 1200 MHz with a AGP S3 Savage 4 & Via 133 chipset someday, I don't know a combination that works though, and for old cheap low end it is getting expensive now to find out.

Did some looking. The cuv4x dose support via cpu's. Don't now about the 1.2ghz but it will definitely support the older ones. They were given out by via to reviewers with the c3 cpu.

A 100% VIA Build should contain a VIA Mainboard, VIA Videocard and a VIA Soundcard, VIA Rhine Networkcard... =)
A VIA S3 Chrome AGP Videocard maybe ? 😀

i also struggled to find a S370 Board supporting more then 933Mhz VIA C3's..
Most support VIA Samuel 2, but S370 Nehemiah ?

matze79 wrote:

A 100% VIA Build should contain a VIA Mainboard, VIA Videocard and a VIA Soundcard, VIA Rhine Networkcard... =) A VIA S3 Chrome […]
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A 100% VIA Build should contain a VIA Mainboard, VIA Videocard and a VIA Soundcard, VIA Rhine Networkcard... =)
A VIA S3 Chrome AGP Videocard maybe ? 😀

i also struggled to find a S370 Board supporting more then 933Mhz VIA C3's..
Most support VIA Samuel 2, but S370 Nehemiah ?

I was going to use a savage 4. To me that's s much better match and it's still a via card.