3DFX Voodoo5 5500 works on PCI-Express !!

[jix-reggio]

Obiwan, Does the V5500 can indicate it runs @66 mhz to the Pci-E bridge
by putting some tape on pin 49 for example ?

[voodoo5k6]

@m14radu : the combination of all adaptors work but only at 33 mhz cause of pci to pcie.

[voodoo5k6]

Voodoo 5500 agp on adaptor pci to pcie in agp2pci 33mhz :





With agp2pci only in 66 mhz I win 400 marks in 3DMark2001se.




Score 3DMark2001SE (66 mhz ) V5 5500 AGP o/c 177 Mhz : 3740 Points

[voodoo5k6]

Intel E8600 3,33 Ghz,
V 5500 AGP @ 166 Mhz on agp2pci modded (33mhz and 66mhz : same result) on pci to pcie :








V 5500 PCI @ 166 Mhz on pci to pcie :

[m14radu]

Very nice pictures !
thanks for the explanations.

The PCI-E to PCI convertor does not support the 66Mhz Bus ?
Are you sure ?

Is there a possibility to mod the adpapter to work @66MHz ?

[voodoo5k6]

@m14radu : I don't know if there is a method to have 66 mhz on pci to pcie adaptor.

If anyone want to help me to find this method it will be ver good.

thanks in advance.

[m14radu]

Well, did u try the same procedure as for the agp2pci adapter ? to isolate with tape one pin ?


I ordered one pci2pcie adapter too..unfortunately will arive only in 3 weeks...because i am in romania...damn.....

[voodoo5k6]

Yes I try it but nothing...

[jix-reggio]

I would be surprised that none of the power users here
can explain how a V5500 works @66 mhz on pci.
(for example when a V5500 Mac is plugged on a Apple mainboard).
I would also be very interested.

today, I got this screen of a V5500 running on Pci-express !

[m14radu]

nice score jix-reggio !

Seems that you will hit the 4k wall soon

how did you achieve this score ? Please give us more details.


Regaring your question...i don't have the answer...very few people know it i'am affraid...
If the PLX bridge is capable to run @66Mhz, then it must be a way to mod it ..... unfortunately i did not have the datasheet of the bridge chip....i'am pretty sure that the mod is possbile, and that it's a symple one !

Can't wait for my adapter to arrive


If somebody find the plx Datasheet, please post the link !
thanks !


P.S. wondering what a voodoo2 SLI, obsidian, voodoo3 or 4... work using this adapter !

[SuperFurryFurryThing]

I do wonder what generating a score in 3Dmark 2001 in 16 bit mode with half of the test turned off tells us. You can't compare the score with the benchmark run in 32bit mode with the default tests running.

[jix-reggio]

You are right, this screen is not very interesting.
I was frustrated because I could not get answers to my questions
about the way a V5500 can run @66mhz in a Pci slot with or without
an hardware mod.
Hope some skilled users will share informations about V5500 @66mhz mode
as I shared about the Pci-Express bridge.


These pictures tells the full story of V5500 and Intel Sandy Bridge encounter
on a P67 Msi mainboard Pci-Express *16 slot.
Pci-E was set @100 mhz, Vsa-100 @189 mhz
and Sandy run @4,2 ghz.

[m14radu]

thanks for sharing us this information.
i don't know exactly how the voodoo is working @66Mhz...i will try to find out

be sure that we will find out how to force the adapter to work @66MHz

did you overclock with powerstrip ?

I hope that Koolsmokey will help us with the vcontrol tool

[osckhar]

I would be surprised that none of the power users here
can explain how a V5500 works @66 mhz on pci.
(for example when a V5500 Mac is plugged on a Apple mainboard).
I would also be very interested.

Because V5-5500 agp is not a true agp. It does not has support agp texture and it runs to AGP1x (266Mb/s), same like PCI vers. So, the models agp/pci are able to run 66MHz. AGP1x=PCI66

• The PCI version you need to find a motherboard with PCI-x slot to run 66MHz.  
• The AGP version you only need an agp socket to run 66MHz.  

The PCI-E to PCI convertor does not support the 66Mhz Bus ?
Are you sure ?

About why the pci- to pci-e adapter does not supports 66MHz. It could be because the PLX chip bridge only has supports to 33MHz.

We would need the datasheet PLX CHIP.

Regards,
Oscar.

[SuperFurryFurryThing]

so far as I am aware PCI devices have a have a bit in configuration space that indicates whether it is a 66mhz capable device. Presumably the brdige should be using this to setup whether it runs at 66mhz or not.

Sfft