rodos - get a thin piece of card and wrap aluminium foil around it. Then put it in a plastic bag (so it doesn't short everything it comes in contact with) and slip it between the two cards and secure. It you're having problems, this is supposed to do the trick (though I haven't tried it myself and I am having problems !)
Hope this helps,
Will.
Wanna get rid of that buzz and hum?...
I have a metal foil shielding between my Pulsar and the main CPU because the PCI slots sit on a riser-card (turned by 90 degrees) right above the CPU fan 
The foil is from a DIY shop where they sell stuff for christmas decoration etc and connected with the metal of the rear case.
A better solution would be an epoxy board with copper layers for circuit design.
The copper is usually coverd by a shielding for photo-processing. This could be mounted to an old rear connector of an arbitray board, so that the copper gets in contact with the case.
cheers, Tom

The foil is from a DIY shop where they sell stuff for christmas decoration etc and connected with the metal of the rear case.
A better solution would be an epoxy board with copper layers for circuit design.
The copper is usually coverd by a shielding for photo-processing. This could be mounted to an old rear connector of an arbitray board, so that the copper gets in contact with the case.
cheers, Tom
Hello guys and thank you for replying! 
So, if I have understood well: it is important this "shielding card" not to touch anything else than the PC case, right? And should it be preferably made by copper?
What is an epoxy card?
Thank you!

So, if I have understood well: it is important this "shielding card" not to touch anything else than the PC case, right? And should it be preferably made by copper?
What is an epoxy card?
Thank you!

"The one who asks, makes a fool of himself once.
The one who doesnt ask, remains always a fool."
The one who doesnt ask, remains always a fool."
Rodos, epoxy is just the carrier for copper layers on printed circuit bords.
It's the only material used for that purpose today. It doesn't matter if copper or some other metal is used, but those boards are the most simple to get.
It's of course essential that the metal shielding doesn't touch any components on the mobo or a PCI card.
Before it gets too complicated:
connect the copper side of such a board with a cable to the metal case of the PC.
Then put the board in an envelope.
Put on headphones full throttle and move the envelope between the cards of the opened PC.
If you can't track the movement audibly then there's no need to worry further
cheers, Tom
It's the only material used for that purpose today. It doesn't matter if copper or some other metal is used, but those boards are the most simple to get.
It's of course essential that the metal shielding doesn't touch any components on the mobo or a PCI card.
Before it gets too complicated:
connect the copper side of such a board with a cable to the metal case of the PC.
Then put the board in an envelope.
Put on headphones full throttle and move the envelope between the cards of the opened PC.
If you can't track the movement audibly then there's no need to worry further

cheers, Tom