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3.3V pci
PostPosted: Wed Jun 02, 2004 2:28 pm Reply with quote
jack crossfire
Guest
 




It's getting real hard to find 5V pci slots to use the pchdtv in. The systems I use to decode HDTV are
all fairly modern and don't have 5V pci slots.
Is there any plan to upgrade PCHDTV to
3.3V pci or is 5V pci the end of the road?
PostPosted: Thu Jul 15, 2004 11:08 am Reply with quote
avsuser
Guest
 




Is 5V PCI a real requirement? I seem to remember some reports here about people using the card in 3.3V slots?

Can someone confirm/deny this? Every time I see this card mentioned in other forums someone responds saying 5V PCI is a showstopper.

If the card can operate in a 3.3V slot, the information on the WWW site should really be updated.
PostPosted: Thu Jul 15, 2004 4:40 pm Reply with quote
jpoet
 
Joined: 11 Nov 2003
Posts: 55
Location: Albuquerque, NM




The HD-2000 needs 5 volts to operate.

Most motherboards have slots which will provide 3.3 or 5 volts, so this limitation does not affect most people.

Some motherboards have slots which will not provide 5 volts. If all the PCI slots on your motherboard have a "seperator" near the backplane, then it will not take a card which requires 5 volts. That "seperator" prevents you from using a card unless it has an extra notch in it's PCI connector -- near the backplane.

John
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PostPosted: Tue Nov 23, 2004 11:42 pm Reply with quote
mhoy
 
Joined: 17 Oct 2004
Posts: 1




What do the new HD3000 cards require? 5 or 3.3 v?
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PostPosted: Wed Nov 24, 2004 7:16 am Reply with quote
onyxsoft
 
Joined: 09 Jul 2004
Posts: 11




mhoy wrote:
What do the new HD3000 cards require? 5 or 3.3 v?


5v

If your pci slot looks like this it will not plug in:

+-+
+ +
+ +
+-+
+ +
+ +
+ +
+ +
+ +
+ +
+-+

If it looks like this it should work:

+-+
+ +
+ +
+ +
+ +
+ +
+ +
+-+
+ +
+ +
+-+

Top of the above ascii art is the back of the computer. Notch near back is 3.3v, notch near front is 5v. Many PCI cards on the market today will have two notches on the card. One near the front and one near the back. These are universal cards and will work in 3.3v or 5v slots.

The HD2000 and the HD3000 are 5v only cards. They will not work in 3.3v slots.
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Need help to find out if my PCI is 5v or 3.3v
PostPosted: Sat Dec 11, 2004 4:43 am Reply with quote
guest
Guest
 




The notch of my PCI slot is indeed near the center of the motherboard and away from the backplane of the computer.

However, I'd like to actually measure the power supply on the PCI slot. Yet I could not find the spec for the PCI pin layout.

Does anybody know which pin is the voltage supply?

Thanks and best regards.
PostPosted: Sat Dec 11, 2004 12:28 pm Reply with quote
CoolerQ
 
Joined: 11 Dec 2004
Posts: 9




So something this would work fine?



Thanks,
--Quentin
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5v vs. 3.3v signaling & weblink with connector illustrat
PostPosted: Sat Dec 11, 2004 4:08 pm Reply with quote
guest
Guest
 




I have asked the PCI pin layout question last night.

Well, it turns out that the difference between 5v and 3.3v is not the power supply. Rather, it is the logical signaling determined by the motherboard.

All PCI connectors provide +3.3V, +5V, +12V, and -12V.

Please see the following webpage for detailed explanations and connector illustrations.

http://sunsolve.sun.com/handbook_pub/General/PCI_Info.html?wrapper=false

The illustrations confirm the ascii drawing by onyxsoft (Thanks!) and should also put CoolerQ's question in bed.

--San Jose
3.3V pci
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