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X79 PCIE 3.0 for 660 To Ubuntu 15.04

post #1 of 9
Thread Starter 
Is there any way I can get my 660 Ti to run in PCIE 3.0 within Ubuntu 15.04? This is a known issue with the X79 chipset and 600 series cards. In windows, I just run the force enable batch file from nvidia, but I'm not sure what to do to enable it in Linux.
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post #2 of 9
Quote:
Originally Posted by Eeyore888 View Post

Is there any way I can get my 660 Ti to run in PCIE 3.0 within Ubuntu 15.04? This is a known issue with the X79 chipset and 600 series cards. In windows, I just run the force enable batch file from nvidia, but I'm not sure what to do to enable it in Linux.

Have you tried using your card on linux yet? If so what was the result? Also which distro are you using and what have you tried so far to get it working?
Edited by etplayer - 10/3/15 at 1:22pm
post #3 of 9
Your 660 Ti while substantially superior to the 640 GTXs I have in secondary boxes both share Kepler architecture and I have had zero problems running Linux (with zero workarounds) with either of the 3 I own. In fact the reason I have bought 3 of them is because I was very happily surprised with the "bang for buck" quotient. So I have to add my inquiry to etplayer's - Have you tried it yet?
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post #4 of 9
Quote:
Originally Posted by enorbet2 View Post

Your 660 Ti while substantially superior to the 640 GTXs I have in secondary boxes both share Kepler architecture and I have had zero problems running Linux (with zero workarounds) with either of the 3 I own.

This is what I'd expect, the kernel will handle any quirks of your chipset or bios and work around the problem itself, assuming there is one. If your system will boot linux at all (probably yes) then you just need the right version of the driver. Other than that, it's best to mention in what way it's "broke" in linux otherwise there's nothing really to help with.

If you haven't migrated to a linux system yet, then I suggest trying ubuntu on a usb bootable drive, and you'll be able to see if it works.
Edited by etplayer - 10/3/15 at 5:33pm
post #5 of 9
I'm not a Ubuntu hater and in fact have Studio Kubuntu installed on this, my main box, though admittedly I tend to stay in Slackware but I have problem with Ubuntu's "Live" environment. Ubuntu like many distros offering that "try before you commit" situation on the installation disc reveal that their priority is installation in that the Live environment is not a full working system but quite crippled since they seem to assume that if you already went to the trouble of finding, choosing, downloading and burning you just need a lil' nudge to commit.

Personally I prefer a full system which, because it is designed to work as is on a wide variety of hardware will often educate one as to what works and how it is implemented.which will assist people at what options to choose during an install such as Ubuntu. Two (2) really effective Live CDs that I use a lot are PUPPY LINUX and PORTEUS LINUX . Both of these are extremely adept at discovery and setup of wide-ranging hardware which can teach by example but also will be useful on many machines and for all manner of maintenance and portability work.
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post #6 of 9
Thread Starter 
Nothing is broken within the system. Nvidia use to have an issue within windows, concerning the X79 chipset running the GTX600 series cards in PCIE 2.0 instead of their supported 3.0 configuration. They released a batch file, for windows, to force enable PCIE 3.0 for the 600 series cards. They later included this force enable in the driver install... But as I've stated, this is for windows only.

Ubuntu 15.04 is running great at the moment. My main card is a 970, which runs natively at 3.0, and the 660 Ti is in my secondary x16 slot. The 660 Ti is running in PCIE 2.0, natively, and I would like it to run in 3.0... This OS is purely for folding and I wanted to see if there was any performance gain. I'm just wondering if there is a way for force enable 3.0 for the 600 series cards within Ubuntu.
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post #7 of 9
I haven't run into an issue like this before, but I would suggest looking through the readme that comes with your driver version on nvidias website specifically looking for module parameters that might force it to use pci-e 3.0, or possibly an xorg.conf option, it may take some digging around. Other than that nvidia have some forums you can post on.
post #8 of 9
Quote:
Originally Posted by enorbet2 View Post

I'm not a Ubuntu hater
...

Personally I would never use or recommend Ubuntu it's just that I missed that the OP is already using Ubuntu.
Edited by etplayer - 10/4/15 at 6:08am
post #9 of 9
Greetz
I just reread this thread and finally get it that all OP is really concerned with is the protocol version for PCiE. If I understand this correctly I'd encourage you, Eeyore888, to consider that this is an exercise in futility since it really wont matter in Linux nor Windows. There is simply no way that the 970, let alone the 670, (actually not even both combined) can saturate the PCiE 2.0 protocol. In fact it is highly unlikely that both in SLI could saturate 1.1 !! This, with your current setup, is simply a non-issue.

Even if you had a pair of GTX 980's in SLI you would be hard pressed to detect any difference on most games between PCiE 1.1, 2.0, and 3.0. Since you don't have that monstrous hardware and are on 2.0 this again is a non-issue.

One important thing to consider beyond bandwidth availability is the data pathways from GPU through PCiE to CPU and back again all relying on the operating system's kernel. Even a stock Linux kernel has 1/3rd to 1/5th the latency ( transfer delay ...lag ) of the best Windows kernel. A high performance, realtime, low-latency kernel has 1/10th to 1/20th the lag of a Windows kernel. This only adds to what you feel as performance rendering the difference all but unmeasurable by any means except on the absolute hottest hardware under the rarest most extreme software stresses currently available.

I have no idea what nVidia will use for a model naming convention in the4 future but whatever they name it, it will have to get to at least 2 more generations IN SLI for there to be a noticeable difference between 2.0 and 3.0 PCiE.

If you'd like to see some in-depth, correlated testing of just this subject take a look In-Depth Comparisons 1.1, 2.0, 3.0


Note that his testing is in Windows only but his measurements do encompass the lag of the Windows kernel. Unfortunately MS does not offer a Hi Performance, realtime, low-latency kernel and Linux doesn't have compatibility with this level of DX11 games so we are left with extrapolation instead of hard numbers, but the progression is nevertheless clear.
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