3dfx Archive - Voodoo5 5500 on VIA K8T800Pro ( AGP 4x )

m14radu

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Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x )
Reply #45 - 26.08.07 at 12:36:49

thanks for the quick answer IceFire.
Wink

Fact is:
- on a normal Voodoo5, if the A2 is connected to the Ground, the card did not start .
- on a damaged Voodoo5, ( with no Slave VSA ) if the A2 is connected to the Ground the card work flawless with 1.5V, and AGP4x.It's behave like a Voodoo4.

It leads to the following conclusion:
There is something in the SLI configuration, that is not fully optimized for 1.5V ( AGP4x ).

I think that a closer look to an Voodoo5 AGP4x Prototype will give the right answer to our problem.

Br.
Radu.

Unfortunately i was not able to find an AGP4x BIOS.
@ All 3dfx Collectors: Please dump an AGP4x BIOS for the Projekt. Grin

Maybe is enought to flash only the AGP4x BIOS on the cutted card...has somebody tryed this ????

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gdonovan YaBB Administrator Offline Infernal Collector Posts: 2361	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #46 - 26.08.07 at 13:00:41 The 5500 AGPx4 boards do not run at AGPx4 mode or at 1.5 volts.
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m14radu God Member Offline Take your chance ! Posts: 555 Timisoara, Romania Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #47 - 26.08.07 at 13:07:38 Osckar Prototype was not 1.5V ?
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osckhar God Member Offline www.3Dfx.es Posts: 812 SPAIN Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #48 - 26.08.07 at 13:44:20 Quote: Osckar Prototype was not 1.5V ? Nope, all my V5 AGP4x noch are 3.3V. Oscar
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IceFire YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 13	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #49 - 27.08.07 at 09:12:01 that would mean that a2 is not connected to gnd on the agp 4x board..... the sli problem is only avaible on the 1,5V mode, so the agp 4x prototypes will give us no solution. ... ???
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m14radu God Member Offline Take your chance ! Posts: 555 Timisoara, Romania Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #50 - 16.09.07 at 18:30:10 Did you manage to contact Hank ? It's the only person who can help us further !
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m14radu

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Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x )
Reply #51 - 27.12.07 at 10:12:25

i need again your help, my Friends..
Wink

i'm searching for a tool that is able to change the AGP voltage from WinXp.
With this i will be able to find the working threshold for the VSA chip, on my Epox Board witch actualy provide 3.3V and it's unfortunately not adjustable.
Roll Eyes

Something interessting here ( page 2 ):

http://www.forumzone.it/topic.asp?whichpage=2&Forum_Title=Hardware+e+software+%2...

"4) AGP 3.3 voltage is only needed by RAM, in primis. If we think to mount the V5 on a AGP8x board, we could cut off the 1.5v pin (useless) and insert an external power supply to power the card. Where could we insert it? The voltage coming from the agp slot ends up to the mosfet on the lower right of the V5, and powers the RAM through internal tracks (connections are not visible from the surface). If we change the voltage in that point, we could change RAM voltage too. This means we could overvolt the RAM directly from the BIOS, if the mainboard allows to modifiy the AGP voltage. Wink

"

hmm ..... what u think ?
If i just supply the memories from the 3V Line of the Molex connector, will the card run stable ?

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« Last Edit: 27.12.07 at 17:03:21 by m14radu »

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RaverX God Member Offline Voodoo2 fan Posts: 533 Oradea, Romania Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #52 - 27.12.07 at 17:09:56 3V on molex ? Hmmm, I know that there are 5V (red) and 12V (yellow). Anyway, we have 5500 PCI, why try so hard to mod a 5500 AGP to fit in modern mobos, AGP is dead too
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exxe God Member Offline ^^ Posts: 1316 germany	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #53 - 27.12.07 at 18:01:21 S-ATA power have 3,3volts the orange cable yellow is 12volts red 5 black is GND
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m14radu

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Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x )
Reply #54 - 27.12.07 at 18:15:13

hehe,

After reading twice the thread on forumzone.it, regarding the VSA voltmodding, i understand that i miss a point in the entyre Projekt.
Wink

I did not measure the VSA and memory voltage on both platforms , to see the differences.
The card unstability on K8T800 Pro can be explained if the VSA core and/or Memory Voltages are lower than on Epox KT333 board.

So that i installed the Projekt Platform, and do the measurements.
Let me tell u something.
I was 100% sure that on the K8T800 Pro board the VSA and/or memories are supplyed with less Voltage...
Well i was wrong.

On both Platform the Voltages are the same.

VSA - 2.8V
Memories 3.3V.

See in the picture the measurements points.

These results show me that not the supply voltages are the Problem...something else.

I did also the following check:
I rise the Vagp on the K8T800 board, from 1.65 V to 1.85V. The VSA and memory voltages were measurured on every VAGP changes and...they remain as above, no changes !

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exxe God Member Offline ^^ Posts: 1316 germany	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #55 - 27.12.07 at 18:56:22 the power menagement parte are neat the power plug i think the v5 use the power that come direct from the PSU for the Chips and memory
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m14radu

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Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x )
Reply #56 - 28.12.07 at 07:52:08

I have no ideea how to continue.
The same voltages on both Platforms makes me confused. Undecided

Would a VSA core voltage rise to 3.0v help ? ( also voltmoding )

To Pity that we don't have the card layout, traces and so on...

It remains for the moment the only method, that ciacara uses ( at forumzone.it ).

@Hank: Help ! Wink

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« Last Edit: 28.12.07 at 07:53:19 by m14radu »

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exxe God Member Offline ^^ Posts: 1316 germany	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #57 - 28.12.07 at 10:24:24 more Vcore = more MHz possible but also many many more heat, you need a better cooling solution
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m14radu God Member Offline Take your chance ! Posts: 555 Timisoara, Romania Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #58 - 28.12.07 at 13:53:58 hmm....i would like to see some picture with this voltmod. ( fur's nachmachen ) Can somebody post a picture with the modified card area ? Some advices and result were great too.
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m14radu God Member Offline Take your chance ! Posts: 555 Timisoara, Romania Gender:	Re: Voodoo5 5500 on VIA K8T800Pro ( AGP 4x ) Reply #59 - 14.08.08 at 17:37:54 It's been a while since i did not work on this projekt. I wold get some free days, and with this ocasion i would like to do a review of the Projekt, in order get a full functionaly V5 AGP4x card. Any ideas and suggestion would help.
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