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Windows 7: Second 6950 is not detected by device manager.

26 Mar 2011   #21
OmieeGAF

windows 7 64
 
 

Quote   Quote: Originally Posted by gazz9496 View Post
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graphics cards

MSI P55A-GD65 Motherboard | Hardware Secrets

now i can only assume you need to do something from the bios to enable this but it could happen automaticly i honestly don't know and couldn't find anything in the bios menu to change it.

woow i dident even know that thank you so much. So what could be the best way to find out how i can activate it?
Where could i find something like this in the bios menu.


My System SpecsSystem Spec
.
26 Mar 2011   #22
gazz9496

 
 

Quote   Quote: Originally Posted by OmieeGAF View Post
Quote   Quote: Originally Posted by gazz9496 View Post
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graphics cards

MSI P55A-GD65 Motherboard | Hardware Secrets

now i can only assume you need to do something from the bios to enable this but it could happen automaticly i honestly don't know and couldn't find anything in the bios menu to change it.

woow i dident even know that thank you so much. So what could be the best way to find out how i can activate it?
Where could i find something like this in the bios menu.

well that was the problem, i couldn't find anything to make a change with from the bios, that said the only bios screens i could find were for the p55 instead of the p55a which you have, the link i added doesn't actually say whether it's automatic or manual just that there is a chip which covers the change.

thats why i assume there may be a bios option for it but i couldn't find any evidence of it either.

the reason i posted the link is because your motherboard requires that the chip changes before it will recognise the second card as the card requires the 16 x pci-e slot.

as to how to get there...i have no idea sorry
My System SpecsSystem Spec
26 Mar 2011   #23
OmieeGAF

windows 7 64
 
 

Quote   Quote: Originally Posted by gazz9496 View Post
Quote   Quote: Originally Posted by OmieeGAF View Post
Quote   Quote: Originally Posted by gazz9496 View Post
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graphics cards

MSI P55A-GD65 Motherboard | Hardware Secrets

now i can only assume you need to do something from the bios to enable this but it could happen automaticly i honestly don't know and couldn't find anything in the bios menu to change it.

woow i dident even know that thank you so much. So what could be the best way to find out how i can activate it?
Where could i find something like this in the bios menu.

well that was the problem, i couldn't find anything to make a change with from the bios, that said the only bios screens i could find were for the p55 instead of the p55a which you have, the link i added doesn't actually say whether it's automatic or manual just that there is a chip which covers the change.

thats why i assume there may be a bios option for it but i couldn't find any evidence of it either.

the reason i posted the link is because your motherboard requires that the chip changes before it will recognise the second card as the card requires the 16 x pci-e slot.

as to how to get there...i have no idea sorry

well at least i know what the problem is now, because i was baffled by it. since both cards worked and both slots worked. but i have the card working in the second slot now without a card in the first slot and its running fine.
would it help if i made a picture of my bios screen?

also could you show me the screens of the p55 to see if my is any different.
also i think it has to be different since that link says the p55 is different in that regard
My System SpecsSystem Spec
.

26 Mar 2011   #24
OmieeGAF

windows 7 64
 
 

well i could not find anything in the bios menu besides pci latelcy and if i wanted the pci e or pci to be the lead thing.
My System SpecsSystem Spec
27 Mar 2011   #25
gazz9496

 
 

indeed the p55 is quite a different board to the p55a from msi, why there should be such a wide disparity between them is odd to say the least.

heres the link for the p55 bios screens
MSI P55-GD65 Review Page 5 - Closer Look(The BIOS) - Overclockers Club

they covered most of the bios but given the huge differences between the boards i'm kinda skeptical it will be of much help.

now i don't know if it's a mistake from msi that when they removed sli support they also reduced or screwed up crossfire support but it's not something i would rule out either.

i had a look at your thread on the msi forum and they seem to be concerned about power and your distribution of it, what you describe with the use of your power cables seems fine though and your psu does support crossfire as well as being within the watt range to power 2 of those cards.
Planning to upgrade your Graphics Card? Read First...

that link shows power ratings for crossfire and your cards only require a 700w psu.

the 6950 in crossfire power requirments are
4 X 75 Watt 6-pin PCI Express power connector is required for CrossFireX system
and one crossfireX bridge connector

beyond that i'm coming up short of what could be the problem other than the motherboard it should work but i have a funny feeling that little switch chip isn't doing what it's suppose to.
My System SpecsSystem Spec
27 Mar 2011   #26
OmieeGAF

windows 7 64
 
 

Quote   Quote: Originally Posted by gazz9496 View Post
indeed the p55 is quite a different board to the p55a from msi, why there should be such a wide disparity between them is odd to say the least.

heres the link for the p55 bios screens
MSI P55-GD65 Review Page 5 - Closer Look(The BIOS) - Overclockers Club

they covered most of the bios but given the huge differences between the boards i'm kinda skeptical it will be of much help.

now i don't know if it's a mistake from msi that when they removed sli support they also reduced or screwed up crossfire support but it's not something i would rule out either.

i had a look at your thread on the msi forum and they seem to be concerned about power and your distribution of it, what you describe with the use of your power cables seems fine though and your psu does support crossfire as well as being within the watt range to power 2 of those cards.
Planning to upgrade your Graphics Card? Read First...

that link shows power ratings for crossfire and your cards only require a 700w psu.

the 6950 in crossfire power requirments are
4 X 75 Watt 6-pin PCI Express power connector is required for CrossFireX system
and one crossfireX bridge connector

beyond that i'm coming up short of what could be the problem other than the motherboard it should work but i have a funny feeling that little switch chip isn't doing what it's suppose to.

that is what im thinking as well, i did a clean install of windows 7 and again tried both cards individually and again both at the same time, and it only recognizes one in device manager. Also tried to remove all drivers and use the second card in the second slot and reinstall drivers and than put both in with crossfire bridge and that did not work either.
im thinking of just getting a new board or something
My System SpecsSystem Spec
27 Mar 2011   #27
sygnus21

Windows 10 Pro
 
 

Quote   Quote: Originally Posted by OmieeGAF View Post
Quote   Quote: Originally Posted by gazz9496 View Post
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graphics cards

MSI P55A-GD65 Motherboard | Hardware Secrets

now i can only assume you need to do something from the bios to enable this but it could happen automaticly i honestly don't know and couldn't find anything in the bios menu to change it.

woow i dident even know that thank you so much. So what could be the best way to find out how i can activate it?
Where could i find something like this in the bios menu.
Can you not find the manual for the board?
My System SpecsSystem Spec
27 Mar 2011   #28
OmieeGAF

windows 7 64
 
 

Quote   Quote: Originally Posted by sygnus21 View Post
Quote   Quote: Originally Posted by OmieeGAF View Post
Quote   Quote: Originally Posted by gazz9496 View Post
did some checking and there is a switch chip to add 8 extra pci-e lanes which aren't nativly active on your motherboard to enable support of 2 high end graphics cards

MSI P55A-GD65 Motherboard | Hardware Secrets

now i can only assume you need to do something from the bios to enable this but it could happen automaticly i honestly don't know and couldn't find anything in the bios menu to change it.

woow i dident even know that thank you so much. So what could be the best way to find out how i can activate it?
Where could i find something like this in the bios menu.
Get and read the owner's manual for the motherboard.

I did yesterday it has 2 pages about crossfire, and no where does it say something about activating it with a switch or something.
It just says what the benefits of crossfire are, how to install it on the board with the bridges and a page about CCC how to enable it.
My System SpecsSystem Spec
27 Mar 2011   #29
sygnus21

Windows 10 Pro
 
 

Reading here...... MSI P55A-GD65 Motherboard | Hardware Secrets

Quote:
The other PCI Express slots are controlled by the chipset, which has a total of eight PCI Express x1 lanes. A small but very important detail is that MSI added a PLX PEX8608 PCI Express switch chip on this motherboard (see this chip near the black PCI Express x1 slot in Figure 2), which adds eight more PCI Express x1 lanes to it. The presence of this chip allows you to run two high-end video cards, SATA-600 hard disk drives and USB 3.0 devices at the same time without any drop in performance. On motherboards without a chip like this, performance may drop under this type of load, as the chipset doesn’t have enough PCI Express lanes to connect all these devices at the same time at their full speed.
Second 6950 is not detected by device manager.-imageview.jpg

The problem is that there's no mention of whether you have to do something to the switch or if it auto adjusts.

Can you post a link to your manual for me. Perhaps I could see if I can figure something out.

BTW your board does doe Crossfire....

Quote:
MSI P55A-GD65 has two PCI Express x16 slots using this configuration. They support CrossFireX, but not SLI.
Thanks

The other question - have you did a BIOS update???


My System SpecsSystem Spec
27 Mar 2011   #30
OmieeGAF

windows 7 64
 
 

http://www.msi.com/product/mb/P55A-G...l#/?div=Manual

This is the manual from the msi website.
Also google did not show me any other people who had the same issue and figured a way to make it work.
Im realy thinking about just selling this board and buying a new one if the motherboard is the problem. Because its def not the cards or the slots. ( tested them again today )
My System SpecsSystem Spec
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 Second 6950 is not detected by device manager.




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