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Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E [message #108617 is a reply to message #108612]

Sun, 08 March 2015 09:59

Kim W.

Messages: 188
Registered: January 2010
Location: Australia

Senior Member

Hmm. The plot thickens...
There is an interesting discussion about the Virtua via and Exsys 4-pci backplanes here:

https://www.gearslutz.com/board/music-computers/346311-virtu avia-pci-expansions-good-alternative-overpriced-magma.html

A couple of posts are hinting that the onboard 3.3v and 5v voltage regulators are underpowered, thereby limiting the number of pci cards that can be used. (Particularly if they are high power devices such as DSP cards.)

Some people have had hit-and-miss success by using premium 700watt supplies, but the evidence is inconclusive.

I rather suspect that a modification may indeed be required to the backplane board, to get 4 EDS cards working.

The biggest clue comes from this post:

"Hi all,
Sorry that I have been in and out of this discussion.
My guess as to why so many people have had issues with the Virtua Via chassis,kit,power supplies, ATX, etc is that simply connecting a larger power supply to the Virtua circuit board will not give reliable results.... This is why....

The Virtua Via backplane circuit board is fitted with two low power voltage regulator IC's ....
1) +3.3 VDC regulator (1084)
and
1) +5 VDC regulator (2596)

In order to supply enough current to the PCI cards(Protools HD, UAD-1, etc) these IC's need to be bypassed out of the circuit path!!

DON'T TRY THIS UNLESS YOU KNOW WHAT YOU ARE DOING... and please don't get mad at me if the smoke comes out!
This is what I followed from the UAD forum(you will have to join to be able to download the guide files with pictures)
Thanks to the Aussie fellow Markus for his tenacity and knowledge.
UAD Forums • View topic - How to get the VirtuaVia box working with multiple UAD cards

(DEAD LINK HERE:) http://www.studionu.com/uadforums/viewtopic.php?f=16&t=9 404

With computer as we all know there are many variables, but in my personal experience the PCI spec is pretty universal within revisions...
Good luck!
AL

p.s. I have used my rig for quite a few paying sessions... though I am more a professional musician and writer than one booking studio time to make my ends meet...

My feelings regarding The Magma offerrings.... I have payed the Magma price in the days of MixPlus... and it worked and was expensive(it was a 2 slot that actually had a third slot with a warning sticker over it that I blew -off and had a 3-slot portable for the mere price of $1250.00 which was still a heck of a lot of money after evertything else was bought...

I would still love to get hold of one of those boards. It shouldn't be too difficult to upgrade the offending regulators...

Kim

[Updated on: Sun, 08 March 2015 10:03]

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[Message index]

		VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: Wayne on Mon, 01 December 2014 14:44
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and more By: Kim W. on Mon, 01 December 2014 20:45
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and more By: Wayne on Mon, 01 December 2014 22:00
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and more By: mikeaudet on Wed, 03 December 2014 19:56
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and more By: Wayne on Wed, 03 December 2014 21:42
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and more By: Wayne on Mon, 02 March 2015 15:00
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Wayne on Wed, 04 March 2015 16:50
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Thu, 05 March 2015 04:17
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Thu, 05 March 2015 06:45
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Thu, 05 March 2015 12:07
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Wayne on Thu, 05 March 2015 15:28
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Fri, 06 March 2015 02:45
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Fri, 06 March 2015 04:51
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Fri, 06 March 2015 05:28
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Fri, 06 March 2015 07:44
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Wayne on Fri, 06 March 2015 15:45
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Sun, 08 March 2015 09:59
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Sun, 08 March 2015 10:52
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Sun, 08 March 2015 11:14
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Sun, 08 March 2015 12:35
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Wayne on Sun, 08 March 2015 14:23
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Sun, 08 March 2015 15:11
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Wayne on Sun, 08 March 2015 16:55
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Kim W. on Mon, 09 March 2015 04:00
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Mon, 09 March 2015 05:00
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: mikeaudet on Sun, 01 December 2019 05:01
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E By: Rich.Kelley on Sun, 01 December 2019 14:15
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: Kim W. on Sun, 01 December 2019 10:37
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: Will The Weirdo on Sun, 09 January 2022 12:24
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: mikeaudet on Sun, 09 January 2022 14:04
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: Will The Weirdo on Sun, 09 January 2022 15:44
		Re: VirtualVia PCI x4 expansion ATX Kit for PCI-E and PCI By: Wayne on Mon, 10 January 2022 12:46

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