Mac Pro keeps logging out since El Capitan

Is it possible that it works for you because ultimately, you have two NVIDIA cards? I think the default is the NVIDIA GT120.

I have an ATI Radeon HD 4870 as a second card and no new drivers for that card ... I don't think there are any.

Theodore Stacy You said ". Can't have more than 2 monitors regardless of multiple cards"

I just added a third monitor to my 2009 with EC and GT120 and PC 5770. There monitory work fine:

- GT120;

DVI>VGA

- 5770 DVI

I can add another DVI monitor to the second DVI output on the 5770 or with a MDP>DVI adopter on the GT120. I do not have a fourth DVI monitor to test.

I have 2 GT 120 cards and still get the log out if I attempt using both cards. Ive installed all the latest drive and have switched off spaces as well.

working off one display till i find a DVI to mini adaptor to try and work off one card.

Thanks. Good tip

Sigh. Thought it was helping me, but alas, even this tip left me with no success.

MacPro 5,1

6-Core Intel Xeon

3.33GHz

Three Monitors:

ATI Radeon HD 5770 in Slot 1

Nvidia GeForce GT 120 in Slot 3

Hi,

WIth 2 gt 120 and spaces switched off, my mac pro 5.1 is not crashing anymore, for 24 h now. Hope it'll last.

I am seeing may people in this thread that have more than 2 screens with two video cards. That means you have at least one card that drives two screens. I have two Apple screens with Mini Display Port connectors. how do I connect those two screens to a single graphics card? The card has one mini port connection and one DVI connection. I have been looking all over shops to find a DVI to mini port, to no avail (someone posted a link to a site, but shipping cost is an issue). So maybe I am missing something? Is there a way to connect both screens to the single mini port connection on the graphics card?

https://jet.com/product/detail/bb5e600477d64fd0a837c3fb01a5326f?jcmp=pla:ggl:ele ctronics_a1:electronics_accessories_cables_a1_other:na:na:na:na:na:2&code=PLA15& k_clickid=8162ca4e-6758-4b3d-8a80-ff8b5280f297&kpid=bb5e600477d64fd0a837c3fb01a5 326f&gclid=CN7d-vDYt8gCFc4WHwodRTYDqw

but not cheap

Hi,

Mini displayport to DVI: http://www.amazon.com/Cable-Matters®-DisplayPort-Thunderbolt-Compatible/dp/B00DJ CB83O

Mini displayport to HDMI. http://www.amazon.com/Mini_Dis-HDMI-CB6-Mini-DisplayPort-Adapter-Cable/dp/B003OC 6LWM

Regards, Brian

Brian,

The problem is that the adaptors are Mini Display Port to DVI and what I need is the opposite: DVI to mini display port. In other words: a male DVI to a female mini display port.

The link that lllaass sent is the correct product, but it requires a US zip code, so I don't think they'll deliver in Belgium. I found the same product here, but instead of 69 $ it is 110 Euro, about 125 $, definitely not cheap.

Hi, I found the same item here in Italy on the amazon.it site for 51,23 €. http://www.amazon.it/StarTech-com-RK812WALLOA-rack-accessory/dp/B005F4SKIU/ref=s r_1_4?s=kitchen&ie=UTF8&qid=1329419043&s….

Regards, Brian

Thanks Brian, it looks like I could order there using my "global" Amazon account. On amazon.co.uk it was 88 GBP ... So you saved me 50 Euro or so!

Best regards,

Wim

At least the first cable you recommend goes just into the wrong direction: what you need is dvi out to display port in (and not vice versa) and that requires quite substantial processing! There was an interface on the market which delivered such a solution but is not any longer in production. The company was Kanex, maybe you find it in eBay used.

This is in reply to my previous comment about trying out two ATI Radeon HD 4870 cards to see if it produced the same logout error as using multiple GT 120 cards.

Well, I bought two ATI Radeon HD 4870 cards, only to find out that the motherboard will only accept one because of the only two available 6-pin power cord attachments (the one card uses both). Anyway, I installed the card and can run two monitors off that one card perfectly. Previously I had experienced sluggishness and choppy graphics when trying to run two monitors off of one GT 120 card, and that option was not viable.

This temporarily will allow me to use dual monitors without any issues, and I can already tell that the card gives substantial better performance than the stock GT 120 that the early 2009 Mac Pro model came with even with two monitors running off it concurrently.

I have also tried hooking up one monitor to each of the new HD 4870 card and the old GT 120 card at the same time, and as dozens and dozens have reported, the logout issue persists.

For now, I can at least say that I am much happier than before, as I can truly use my previous setup of dual monitors off the one new HD 4870 card perfectly. Still a bandaid on the problem, but I can work as before until Apple finally decides to get on the ball and fixes this major OS issue.

Hi, I have a 2009 Quad 2.66 upgraded to 3.33 Hex 6-core Westmere 2010 processor with a NVIDIA GeForce GTX 660 not flashed.

I'm still running 10.9.5

Two question:

Has this problem been solve for my machine/cofiguration?

And

Is there any speed advantage on upgrading to El Capitan or Yosemite for my old computer?

Thank you!!!