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PCI Express Extender Cables Benchmarked - Page 8

post #71 of 104
I am looking to connect one R9 290 card to my a ASUS Z77i Deluxe mini-itx motherboard, I am going to need around 30cm. I am looking for the most cost efficient way.

I am wondering if anyone had any experience with risers and have any recommendations/cautions?
I was looking at the following
http://www.aliexpress.com/item/Hot-1pcs-PCI-Express-PCI-E-16x-to-16x-Extender-Cable-Riser-Card-30cm-PCIE-08/1690547754.html
http://www.aliexpress.com/item/30cm-0-3m-PCI-E-PCIE-to-PCI-Express-16x-Slot-Riser-Card-Extender-Cable-For/1411580494.html

The generic unshielded should be sufficient? I can wrap it in aluminum tape by myself if need be, most EMI issues are from crosstalk when multiple risers are stacked it seems.

Should I use a powered or non-powered? I am only using one card so it should not exceed the limits of the mobo's pcie power.
post #72 of 104
Hey guys,

500mm test
post #73 of 104
What about using the shielded 500mm, and combine it with the 250mm version also available from 3M? I'm wanting to do a SLI setup on the wall.
post #74 of 104
This is amazing! I just ordered 2 PCI Express 16x risers but now here is my question:

One of my cables is unpowered and one is powered!
Is it possible to connect them! And if so where does the powered need to go?

And what if i buy 2 powered risers. Do i need to power them both? or can i just power one of them. If so wich one?
post #75 of 104
Quote:
Originally Posted by Angelicjack View Post

This is amazing! I just ordered 2 PCI Express 16x risers but now here is my question:

One of my cables is unpowered and one is powered!
Is it possible to connect them! And if so where does the powered need to go?

And what if i buy 2 powered risers. Do i need to power them both? or can i just power one of them. If so wich one?

Both of mine were un powered. i have only tried these, so can not say about the powered ones
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post #76 of 104
Quote:
Originally Posted by gr1mm18 View Post

What about using the shielded 500mm, and combine it with the 250mm version also available from 3M? I'm wanting to do a SLI setup on the wall.

they should stack up as also show by the thread starter
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post #77 of 104
Quote:
Originally Posted by wirk View Post

OK, so I reply to myself reporting results of deeper investigation of the problem. It turns out that splitting of a PCI-E slot relies on the motherboard support for PCI-E bifurcation. Bifurcation means in general redirecting PCI-E lanes to specific slots and apparently it is implemented in the PCI-E chips but likely it needs software support (in BIOS?) for activation. There are some motherboards which officially support bifurcation, among them server boards /e.g. Supermicro/ or some mini-ITX boards which use riser cards to save space. Thus, to use passive PCI-E splitter the bifurcation support is required in the motherboard. There is no information if standard motherboards have bifurcation support, probably not. BUT, there are also active PCI-E expanders and they apparently work with any motherboard. I am not aware if using them requires instlallation of a special software in the motherboard or do they work right of the bat when connecting to the PCI-E slot.

I know I'm replying to your ancient post but when I was looking around to split a x16 into two x8s I found this thread but didn't know where to look to buy the stuff. I can confirm that your motherboard BIOS will require bifurcation support for this to work. Also need to make sure that the bifurcation cable is compatible with your motherboard so you don't fry your expensive parts. Here is a good quality maker of bifurcation/riser parts. I got one from them to split my single mini ITX x16 into x8 but I checked with them and they confirmed that my Asrock server board was supported by the product that I intended to buy. A little in the pricey side but the build quality is definitely there including the shielding of the ribbon cable. If someone wants to see a pic of it I can post just PM me, I would have already posted but the pictures is on my camera at home.

Here is the link, hope you find what you are looking for quickly. http://www.ameri-rack.com/ you can only order after you confirm with them on which motherboard you want to use the product on to make sure it's compatible. Kind of like not letting someone order a SAS controller for their SATA hard drive smile.gif I was glad and appreciate that they did that but that was after I got irritated that there was no "Order Now!" button.
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post #78 of 104
Quote:
Originally Posted by Artah View Post

I know I'm replying to your ancient post but when I was looking around to split a x16 into two x8s I found this thread but didn't know where to look to buy the stuff. I can confirm that your motherboard BIOS will require bifurcation support for this to work. Also need to make sure that the bifurcation cable is compatible with your motherboard so you don't fry your expensive parts. Here is a good quality maker of bifurcation/riser parts. I got one from them to split my single mini ITX x16 into x8 but I checked with them and they confirmed that my Asrock server board was supported by the product that I intended to buy. A little in the pricey side but the build quality is definitely there including the shielding of the ribbon cable. If someone wants to see a pic of it I can post just PM me, I would have already posted but the pictures is on my camera at home.

Here is the link, hope you find what you are looking for quickly. http://www.ameri-rack.com/ you can only order after you confirm with them on which motherboard you want to use the product on to make sure it's compatible. Kind of like not letting someone order a SAS controller for their SATA hard drive smile.gif I was glad and appreciate that they did that but that was after I got irritated that there was no "Order Now!" button.

Thank you for your reply which is quite useful. I understand now that passive PCIe splitter requires bifurcation support. How about an active PCIe splitter like the one from Supermicro?
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post #80 of 104
Quote:
Originally Posted by wirk View Post

Thank you for your reply which is quite useful. I understand now that passive PCIe splitter requires bifurcation support. How about an active PCIe splitter like the one from Supermicro?

I think I saw a disclaimer somewhere where it only works on supermicro boards and nothing will get fried but that looks like a PLX chip, looks like it does split 1x16 into 2x16. I'd check with them even if you have a supermicro because it might not work for your particular board.
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EK-FC Titan X Pascal - Acetal+Nickel [383110983... EK-FC Titan X Pascal Backplate - Black [3831109... Swiftech MCP655 Series 12 VDC D5 Water Pumps - ... Noctua SSO Bearing Fan Retail Cooling NF-P14s r... 
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