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PCI-e 3.0 card and 3.0 mobo running 2.0?

post #1 of 28
Thread Starter 
GA Z77X UD3H anda 7970 iceq 2 and it shows as 2.0 even when i set it to 3.0 in bios?
post #2 of 28
Are you also using an Ivy Bridge processor with it? The PCI-Express controller for those lanes is located on the processor, and Sandy Bridge processors only have PCI-Express 2.0.
post #3 of 28
Thread Starter 
Quote:
Originally Posted by Omicron View Post

Are you also using an Ivy Bridge processor with it? The PCI-Express controller for those lanes is located on the processor, and Sandy Bridge processors only have PCI-Express 2.0.

using SB frown.gif but why would a 3.0 card not work on a 3.0 mobo regardless of the CPU?

http://www.evga.com/forums/tm.aspx?m=1607292&mpage=1&print=true

is this legitimate?
post #4 of 28
Because PCI-E lanes are in the CPU. Ivy Bridge brings PCI-E 3.0 to the table.
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post #5 of 28
Thread Starter 
argggg , so mad, cant even use the card to its 100% potential

http://www.tomshardware.com/forum/319335-28-sandy-bridge-support

so i'd have to get a IVY BRIDGE cpu which i would need to delid to get a nice temperature drop so i dont have a hot hot hot processor just to use my 3.0 card? frown.gif
post #6 of 28
You need CPU with PCI-E 3.0, MB with 3.0 and GPU. Not much loss.
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post #7 of 28
Quote:
Originally Posted by JrWhopper View Post

using SB frown.gif but why would a 3.0 card not work on a 3.0 mobo regardless of the CPU?

http://www.evga.com/forums/tm.aspx?m=1607292&mpage=1&print=true

is this legitimate?

The only way ud achieve PCIE 3 is if u had a processor that supports it. The PCIE lanes are all based in the CPU so even if the motherboard is PCIE3 compatible, you wont get any PCIE3 without the proper processor.
Quote:
Originally Posted by JrWhopper View Post

argggg , so mad, cant even use the card to its 100% potential

http://www.tomshardware.com/forum/319335-28-sandy-bridge-support

so i'd have to get a IVY BRIDGE cpu which i would need to delid to get a nice temperature drop so i dont have a hot hot hot processor just to use my 3.0 card? frown.gif

Well we arent really even close to fully using PCIE2. I wouldnt worry about it much.
    
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post #8 of 28
You can use that card at 99.9% potential at X8 2.0. Don't worry about it. PCI-E 3.0 is future proofing.
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post #9 of 28

Ivy Bridge chips really not that hot...

 

People say they are, but they really aren't. Plus, they can be hotter before failure. The pluses outweigh the minuses. smile.gif

 

Also, as people have said, the difference between 2.0 and 3.0 speeds is negligible, and there is no need to switch.


Edited by Tagkaman - 2/25/13 at 8:38pm
post #10 of 28
Thread Starter 
thanks guys ... another stroke avoided

http://www.newegg.com/Product/Product.aspx?Item=N82E16813128544

i just dont get why they advertise 3.0 pci slot on a board that doesnt support a processor that has pci-e 3.0...

im tired of this false advertising and companies that dont give you all the information up front

"The PCI Express x16 slots support up to PCI Express 2.0 standard when an Intel 32nm (Sandy Bridge) CPU is installed."

"PCI Express 3.0 x162 (x16, x8)"

i dont understand at all
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