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Rampage iV Extreme dual video cards POST selection?

vacaloca
Level 9
Hello,

I have both a Quadro K6000 and a GT 635 card on my system -- the GT 635 drives my displays and the Quadro is used for CUDA programs. Is there a way I can place the Quadro K6000 in the top slot (slot 1) and be able to POST from slot 3? My previous motherboard [MSI X79A-GD45 (8D)] POST'd from whatever card had the video inputs connected, whereas this one seems to post with whatever card is in slot 1. Any way to override that? Not a big deal if not possible, but the Quadro is a big card and otherwise it sits on top of the PCH fan and blocks a slot.

I do realize that this is perhaps an unusual configuration, but it would be nice if there was an option to pick what card to boot from in the BIOS... didn't see anything like that.

In case it matters -- currently booting Win7 x64 and Ubuntu GNOME Alpha 2 via Legacy BIOS (CSM mode) and probably do not intend to switch back to UEFI... was using UEFI setup on my previous board and it was nothing but headaches with strange audio/video POST bugs...

Also, running latest 4802 BIOS and i7-4930K.
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4 REPLIES 4

vacaloca
Level 9
bump! I guess no one else cares about booting from a different card that is not in slot 1 when having a second one installed?

ResHacker
Level 7
My suggestion would be to switch the cards. Both the cards are running in PCI-E 3.0 X16 anyway if you put them in slot 1 and 3.

I have R4E 4802, i7 4930k, 2 GTX Titans in slot 1 and 3 with SLI. I use CUDA on both cards, but the one on slot 1 is for development. The other one on slot 3 is for production and running jobs that could take weeks each time. In the interim of jobs I also log into Windows for SLI gaming (My main production system is CentOS 6.5).

Something else: I do not think K6000 is worth it if you do not need the extra 6GB of memory and ECC protection feature. My liquid cooled Titans are stable at 40°C with automatic superclocking of 1019MHz using Linux driver 331 and CUDA 5.5. Each runs 20% faster than Tesla K40m (GK110B at 745MHz) and about 10% faster than Quadro K6000 (GK110 at 902MHz, same chip as Titan!). I had real experience for these for training neural networks. Also K6000 is not really for consumer or gaming motherboards; you should get a server motherboard with Xeon processors.

vacaloca
Level 9
Thanks for the reply. I actually did switch the cards, I forgot to mention that. I was just hoping I wouldn't have to so that I'd have an additional PCI-E slot free.

This is actually my home build, heh. My dept built a decent server with 32 cores and a Titan (thankfully) on my suggestion, so I have that available as well. Long story short.. my univ dept didn't want to budge for the $ for the K6000, so I just bought one off eBay a while back (way below retail) and I'll resell it when I'm done with it. 🙂

In re: ECC, I do not, however I do tend to exceed the > 6GB on occasion with EM simulations. Had a Titan before and overclocked pretty nicely indeed. I can overclock the K6000 as well, but I haven't done too much work on that. I'm going to try the new Kepler BIOS Tweaker eventually.. that one seems to have more control over power restrictions. If I attempted to overclock the K6000 at the level I was able to take the Titan (anywhere from 1075-1150 w/ DP units on and roughly a 400MHz memory underclock), and run a very compute-bound CUDA algorithm, the card throttles, and I'm pretty sure it s because of a power limit breach... seemed to happen pretty much when i hit 230W.

In re: K40m, are there higher application clocks available? What's the maximum clock rate supported? I had seen the 745MHz figure quoted elsewhere, but not sure if NVIDIA would've given more (or higher!) clock options than they did on the K20... but maybe not since the Tesla is usually their 'stable' product.

You mention 'automatic superclocking' -- is that your way of saying you flashed a BIOS with a higher clockspeed? If you know of a way of overclocking recent NVIDIA cards in Linux without a BIOS flash I am all ears.

Re 'automatic superclocking': I did not flash a BIOS, it was stock non-superclocked version of EVGA (:rolleyes:) and it reaches 1019MHz instantly. I am saving that BIOS to flash ASUS Titans....