A "new" build - MVP3G5

Discussion relating to Socket 7 hardware.
lazy_kalabok

Post by lazy_kalabok »

stedman,

its impossible to change the divider without changing the hardware/the jumpers. the system freezes everytime you try to change it.
95/31 to 83/33 or
133/44 to 66/33
or even 133/44 to 133/33 all the same - the systems stops.

note the different frequencies u are able to switch in bios (chipset features), if you reset the frequency jumper on the mobo - setting it to 100mhz you can choose between 95, 100 112, 124 and 133 mhz. all with the /3 divider.
same with 66 - only 66 and 75 are availible (/2)

it seems to me, that no bios tweak is able to get the /4 divider to run. the system recognizes the divider by settings in the pll, which are set by jumpers. only hardware changes maybe will allow to set it correctly.
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Stedman5040
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Post by Stedman5040 »

After trying to change the divider on the fly in cpucool I realised that this was not going to happen without the big freeze. By the way for this M/B (EP-MVP3G2) you have the following fsb's available at 3x divider under cpucool.

95,100,103,112,115,120,124,133.

Stedman
lazy_kalabok

Post by lazy_kalabok »

sure,

my mvp3c2 has the same options - we both have the winbondXXX-58 pll. but you can choose them only under windows.
you tried to reboot with 103/115/120 mhz fsb? it will not work - ok, it will, but bios resets the fsb to 112 or 100. even if you have choosen no jumper and set fsb to "default" in bios.
its a little more complicated here. bios is able to set 8 frequencies - the pll supports 16. the other eight can be achieved by changing bit 3 in register 0 to 1.
you get 103, another 112(!), 115, 120, 124/31; 133/33; 140/35 and 150/38,5 (frequencies with no slash have the /3 divider). that one bit is resetted everytime by bios on reboot.

as there is no ability to choose 103 or 115 in bios, you cant get those last 8 frequencies listed in cpucool.
...
DasMan2

Post by DasMan2 »

Lazy_kalabok, that "bit" of info on the VIA chipset is very interesting.

Jim are you able to get the datasheets for the VIA MVP3 chipset posted up in the downloads section for future retrieving by other interested persons?

People should do some real life internet browser responsiveness testing of I.E. 5.5/6.0 and Netscape 7.1/7.2 (& others) when suspected improvements in performance have been achieved in other standard test setups in Win 98 S/E or Win XP.

Super 7/Socket 7 users should understand how things can be optimized in preceived needed (testing) areas while not affecting or hopefully improving the practical required used areas.

I have a SiS530 Super 7 setup that has no AGP slot and runs only 100Mhz bus with a AMD K6-2 450"+" @550 and 160 megs ram. Onboard video de-activated with a Matrox Mill II 8 meg PCI video card in use[onboard sound used].
This present setup with just CTU activated and no other real tweaking provides extremely fast responsiveness in both I.E. 6.0 and Netscape 7.2 yet has below average Everest scores that most other systems are 50% better and gaming 100% better.
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Post by Jim »

@ DasMan : If I knew how, (bear in mind that I get my internet second hand through my landlord's router; and not all things are possible for me), I would; but I don't. So give me your e-mail address; and I'll send you a copy; and you can try to get them into the download section.
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DasMan2

Post by DasMan2 »

Jim you can send the file to this e-mail address: carmand@shaw.ppppca
(remove the pppp)
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KachiWachi
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Post by KachiWachi »

I'm not really following this topic, but it it seems to me that you should be able to select legitimate, non-overclocked frequencies on the fly, and things should still work.

Can you?

If not, then the way CPUCool is switching the frequencies could be to blame. Perhaps it needs to execute a "stop clock" command first, switch frequencies, then a "start clock". The board could be freezing because the PLL is momentarilly going to a wacked out frequency that just mis-times everything.

Just my 2 cents.

Merry Christmas all BTW. :D
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Stedman5040
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Post by Stedman5040 »

@K

Using cpucool I can set 95,100,103,112 fsb on the fly with no problems as they are all using a 3x divider. As soon as I try any setting, going from a 3x divider to one that does not use a 3x divider the system crashes. So, for instance going from 100/33 to 83/33 the system crashes.

If you feel that this should not be the case then perhaps we can get the owner of cpucool to take a look and maybe fix it.

Stedman
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KachiWachi
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Post by KachiWachi »

Again...not being familiar with this topic...or the motherboard in question...

How is the hardware jumper set on the board...to a 3x setting (only thing available)...or to "no" setting at all?

What about 115/38.3 (3x) or 133/44.3 (3x), or 124/41.3 (3x)?
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lazy_kalabok

Post by lazy_kalabok »

no no no,

cpucool is not the prob. maybe someone wo has got no epox board can try out the following - switch the fsb from 100/33 to 66/33 in cpucool. i bet, every system will hang up.
any volunteers?
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Post by Jim »

If it were a DFI you were playing w/ I would, (just as a shot in the dark), try setting the RAM to asyncronous and see if that makes a difference.
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KachiWachi
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Post by KachiWachi »

Upon review, I don't think CPUCool is the problem either...especially from reading how the clock chip works.

If I read the motherboard manual correctly, there is no "automatic" setting either...the board "requires" you to set a clock jumper...so it was designed with manual clock control in mind.

I assume that because of the chipset limitations (100 MHz officially), that this is why the 124 and 133 jumper settings are not present (though I'm surprised that the 112 is).

Thought -

Perhaps there is a way to manually put multiple clock jumpers on and get 124 and 133 clocks that way. Can someone check to see how they are "grounding" things, etc... (ohm the thing out)? There are obviously only two pins present, but they cover three "jumpers" to the clock chip.

Thanks.
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Post by Jim »

What KachiWachi just said went completely over my head; but would very much appreciate it if someone who understood it could do the same for a DFI.

EDIT : Reading Kalaboks comments :

"you tried to reboot with 103/115/120 mhz fsb? it will not work - ok, it will, but bios resets the fsb to 112 or 100. even if you have choosen no jumper and set fsb to "default" in bios.
its a little more complicated here. bios is able to set 8 frequencies - the pll supports 16. the other eight can be achieved by changing bit 3 in register 0 to 1. you get 103, another 112(!), 115, 120, 124/31; 133/33; 140/35 and 150/38,5 (frequencies with no slash have the /3 divider). that one bit is resetted everytime by bios on reboot."

led me to wonder if you could possibly get around this problem w/ the "Bios Patcher"; (which I have never used, - so I don't know what its limitations are.)
Last edited by Jim on Sat Dec 23, 2006 11:57 am, edited 3 times in total.
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2x 80G Maxtor (7200) Ducted w/ 2x486 Fans Mount
52/24/52/16 LG CDR/RW/DVD
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KachiWachi
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Post by KachiWachi »

LOL...OK Jim. :P

In the manual I have for the EP-MVP3G-x boards, Page 3-4, it shows an image of JP3, which is a double-row connector. I assume you put a jumper across the selection you wish to use.

In looking at the clock chip datasheet, Page 5, it shows the FSx jumpering required to make the various frequencies.

Somehow, the motherboard is turning two pins into three.

If someone can figure out how this is done (you need the board to do this, because I can't see how you could do it logically from the "truth table"), then let me know.

It *might* be possible to select two frequencies that would make the 124 and/or 133 selections possible by jumper.
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PC #3 - HP8766C, PIII-667, 768 MB SDRAM
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kalabok
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Post by kalabok »

hmmm ...

interesting question, kachiwachi. my poor knowledges of informatics cant explain that. for a dfi its all simple - there are three jumpers, setting them to on/off gives 2^3=8 frequencies. but for epox settings ... i am trying get into the architecture of that pins, plls and bios - recently i found an interesting little program called modbin.
i post a screenshot of it - seems to give a nice overview on bios settings by digging a little deeper. but even looking around a bit its still a mystery for me how peaple mod bioses for large hdd support or k6-x+ recognition. maybe one of you guys knows a bit about it.

have a look on it - crazy stuff.
Attachments
modbin for the mvp3c2 bios
modbin for the mvp3c2 bios
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