[SOLVED] Asrock z77 extreme 4 for two way SLI
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=695
Printed Date: 22 Dec 2024 at 2:16pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: [SOLVED] Asrock z77 extreme 4 for two way SLI
Posted By: GameBurger
Subject: [SOLVED] Asrock z77 extreme 4 for two way SLI
Date Posted: 24 Aug 2015 at 1:10am
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Official Asrock z77 extreme 4 spec page says: - 2 x PCI Express 3.0 x16 slots (PCIE2/PCIE3: single at x16 (PCIE2) / x8 (PCIE3) or dual at x8/x8 mode) What bothers me is that it says "single at x16" and "dual at x8/x8". Is this how its supposed to be or are there motherboards that have better support for two way SLI? Thanks beforehand! P.S. My desired cards are two 980 Tis. |
Replies:
Posted By: Xaltar
Date Posted: 24 Aug 2015 at 1:50am
| That is how its meant to be. Only enthusiast platforms like socket 2011 support x16/x16. Currently there are no GPUs that will bottleneck noticeably at x8 even on PCIE 2.0. |
Posted By: parsec
Date Posted: 24 Aug 2015 at 1:58am
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Yes that is how it is supposed to be, and is all it can be, without additional help. All the Ivy Bridge processors you can use in a socket 1155 board like the Z77 Extreme4, supply 16 PCIe 3.0 lanes. The Z77 chipset provides PCIe 2.0 lanes, which are not used for video card slots. So use two video cards in SLI, sharing the PCIe 3.0 lanes, and you get x8 in each slot. If you are using a Sandy Bridge processor, you will only have PCIe 2.0 lanes from the CPU. With a CPU providing PCIe 3.0 lanes, no video card can use all the bandwidth of an x8 lane. A few high end boards have PLX PEX chips, that multiplex the PCIe 3.0 lanes between three x16 slots, but that is for triple SLI at x8. If you really want two x16 capable slots for dual SLI, you'll need to get an X99 or X79 board, and a HEDT processor. ------------- http://valid.x86.fr/48rujh" rel="nofollow"> 
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Posted By: GameBurger
Date Posted: 24 Aug 2015 at 2:03am
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Thanks a lot! :D I was just a tad bit concerned about that part. |