View Full Version : GTX 295 folding...
Ok, got my first card installed. Looks like I'm going to have to come up with a new style of dummy plug. The HDMI port has to be plugged in to get the 2nd GPU to fold in Vista.
Anybody else on the team want to chime in if you fold with the 295s on Vista, and what you had to do to get them working?
I'm planning on getting a second one, but I'm a little concerned given that I'm running Vista 64, and I've seen at least one person say that they could only get 3 of the 4 GPUs actually folding.
I'm using the 182.06 drivers.
I'm going to post a question about the dummy plugs over in the volt-mod sub-forum.
On the plus side, 511 point WUs are running at 5.5-6K ppd.
Newegg sells hdmi male to DVI female adapters for about $7. You have to modify a DVI to analog adapter by pulling the 4 small pins around the flat spade on the dvi side and add your 3 100 OHM resistors on the analog side, plug that into the HDMI-DVI adapter. Radio shack has the hdmi to dvi adapters for $35 if you have to have one today.
Newegg sells hdmi male to DVI female adapters for about $7. You have to modify a DVI to analog adapter by pulling the 4 small pins around the flat spade on the dvi side and add your 3 100 OHM resistors on the analog side, plug that into the HDMI-DVI adapter. Radio shack has the hdmi to dvi adapters for $35 if you have to have one today.
I've also see the male hdmi/female DVI adapters at monoprice for $3 1/2.
I'm not understanding the pull the 4 pins part though. I understand the 4 pins around the spade are the analog RGB (plus 1 other signal) pins, and the spade is the common ground. But if I pull those pins, then wouldn't the resistor on the analog side just not connect to anything?
and yeah, I'm going to be hitting the radioshack because I can't be without folding on maximum power if I can avoid it ;) :bang head :beer:
Ok, I see now that the HDMI/DVI adapter doesn't have the holes for the 4 pins around the spade. However since 3 of those 4 pins are what you are hooking up the resistors to on the analog side, I don't see how this is going to work. I did try a resistor in pins 4&5 and pins 11&5 and pins 12&5. None of them worked. I even did a reboot with it plugged in on 12&5 (btw I'm at work testing it on the HDMI port on my 9800 GX2s. I even tried a wire to short it on pins 12&5. That didn't work either. No damage done though.
I saw on the EVGA forums where pins 19 & 18 on the HDMI side might work with a 1K Ohm resistor. I'm thinking of trying that.
Ok, well, I switched to the 185.20 drivers. I might not have needed to, as I probably wasn't slecting the right multi-gpu/multi-monitor options. They are labled differently between the 2 drivers I was using.
However, I'm pretty sure the problem people are having is because you can't simulate a monitor connection with vga to whatever dummy plugs.
It may be possible, but I haven't found the right way yet.
On the plus side, I am folding about 14Kppd on this GTX 295.
But I think that the people having problems with only being able to do 3 of 4 GPUS on Vista 64 would be able to get all 4 up, if they had 2 monitors to plug into the HDMI ports.
Well, as I found out today, It doesn't work to pull the 4 pins, just as you say. I have to admit after trying twice now, with different cards and drivers, that I can't get the 2nd GTX295 to work. I've spent hours and the best I can do is get instant EUEs on gpu 2 and gpu 3. I tried all the multi monitor stuff, but I can only get 3 monitors to show up in settings. I extend the desktop on to the two non primary monitors and then nVidia control panel finds two GTX295s but only one display on the 2nd one. I guess I'll have to put the 2nd 295 into another rig, just as I did the first time I tried it. I'm even using XP x64 which is known to work. Let me know if you finfd the secret.
Yeah, it is pretty frustrating. I'm going to be asking a few EEs I know if they can point me in the right direction.
It may be we will have to wait for a new driver to come out. :(
Get ahold of that guy that's running what, 9 of them? Guessing he may be able to help figure it out
Get ahold of that guy that's running what, 9 of them? Guessing he may be able to help figure it out
He is running XP. Which doesn't require the dummy plugs. I'm running Vista 64 bit which does.
Everybody I've been able to find who is running them without problems is doing it on XP.
The one XP rig I've got at the moment only has 1 PCIE slot on it.
I've been considing getting a new motherboard for it for a while now.
However, I would like to be able to make a dummy plug for this that works.
http://foldingforum.org/viewtopic.php?f=52&t=8073&start=30
More discussion on this topic
Yep, read that one while I was doing research on it. However given that the VGA dummy plugs can't actually work on the DVI/HDMI adapter (the 3 RGB pin have nowhere to connect to, and the pin 4 that is mentioned doesn't even pass through the VGA/DVI adapter), I think something else is going on.
I'm going to keep trying, but I think the key is to find out how to make the HDMI port think there is a monitor attached. It is probably going to be more complex than just a resistor or two (though I hope that 1Kohm resistor suggesion I saw on the EVGA forums works, I'm not holding my breath).
I'm hoping something like a HDMI splitter box might work. Something that sends an actual signal to the card.
You've probably already seen this, then
http://forums.overclockers.com.au/showpost.php?p=10028462&postcount=16
Voodoo Rufus
02-28-09, 07:18 PM
I've got a problem with one of my 295s. Core 1 (on a 0-3 scale) keeps kicking out "Unstable Machine" errors. Any idea what may cause this?
You've probably already seen this, then
http://forums.overclockers.com.au/showpost.php?p=10028462&postcount=16
Yep. And I'm not sure what is going on with him, but of the 3 different VGA-DVI connectors I've tested, none of them actually pass through a connection from pin 4. Or pin 11 for that matter. Pins 5 and 12 pass through, and connect up to pins 15 and 7 respectively on the DVI side. But hooking up a 75 ohm resistor on those two pins didn't work for me.
I've got a problem with one of my 295s. Core 1 (on a 0-3 scale) keeps kicking out "Unstable Machine" errors. Any idea what may cause this?
That is what I was getting too before I hooked up a HDMI>DVI adapter and plugged it into my monitor. Core 1 is the one that is hooked up to only the HDMI port. I had to activate it through the Nvidia control panel after upgrading to the 185.20 drivers.
Hope that helps.
Voodoo Rufus
03-02-09, 12:05 AM
It's not a monitor issue. My other GTX295 is folding with nothing plugged in at all. I tried plugging the HDMI port on my monitor into the card and it doesn't fix the issue.
Hmm...
Maybe something for the Nvidia forums then. Given that Folding is currently pushing a lot of video cards sales... People who just needed one are now needing many ;)
I guess I'm still going to buy the other 295 I was thinking about.... I should be able to get at least 3 GPUs running for a while. Once I get a new motherboard for my media server, which runs XP 32bit, I could then run the 2 cards on it.
EDIT: Rufus, it does look like somebody was able to get all 4 folding with 2 HDMI monitors plugged in: http://foldingforum.org/viewtopic.php?f=52&t=7874&start=180
It also looks like from the comments there, Nvidia is working on a fix. So, I will get the card, and work on the HDMI issue and hope for a driver fix from Nvidia.
Voodoo Rufus
03-02-09, 11:07 AM
I'm running XP64 for an OS, so I don't need any dummy plugs.
I'm going to install my backplates today and maybe replace some of the TIM on the cars in the hopes of lowering temps. GPU1 is running hotter than GPU0 and only GPU0 is folding. Weird, eh?
Voodoo Rufus
03-02-09, 07:43 PM
If this helps at all:
[00:33:09] Assembly optimizations on if available.
[00:33:10] Entering M.D.
[00:33:18] Working on Protein
[00:33:19] Client config found, loading data.
[00:33:19] Starting GUI Server
[00:34:01] Run: exception thrown during GuardedRun
[00:34:01] Run: exception thrown in GuardedRun -- Gromacs cannot continue further.
[00:34:01] Going to send back what have done -- stepsTotalG=15000000
[00:34:01] Work fraction=0.0096 steps=15000000.
[00:34:05] logfile size=10416 infoLength=10416 edr=0 trr=23
[00:34:05] - Writing 10952 bytes of core data to disk...
[00:34:05] Done: 10440 -> 3867 (compressed to 37.0 percent)
[00:34:05] ... Done.
[00:34:11]
[00:34:11] Folding@home Core Shutdown: EARLY_UNIT_END
[00:34:14] CoreStatus = 72 (114)
[00:31:53] Project: 5749 (Run 11, Clone 266, Gen 173)
[00:31:53]
[00:31:55] Assembly optimizations on if available.
[00:31:55] Entering M.D.
[00:32:04] Working on Protein
[00:32:07] mdrun_gpu returned
[00:32:07] Going to send back what have done -- stepsTotalG=0
[00:32:07] Work fraction=0.0000 steps=0.
[00:32:11] logfile size=9039 infoLength=9039 edr=0 trr=25
[00:32:11] - Writing 9577 bytes of core data to disk...
[00:32:11] Done: 9065 -> 3259 (compressed to 35.9 percent)
[00:32:11] ... Done.
[00:32:19]
[00:32:19] Folding@home Core Shutdown: UNSTABLE_MACHINE
[00:32:21] CoreStatus = 7A (122)
[00:32:21] Sending work to server
[00:32:21] Project: 5749 (Run 11, Clone 266, Gen 173)
[00:32:21] - Read packet limit of 540015616... Set to 524286976.
[23:08:58] Project: 5768 (Run 5, Clone 234, Gen 147)
[23:08:58]
[23:08:58] Assembly optimizations on if available.
[23:08:58] Entering M.D.
[23:09:07] Working on Protein
[23:09:08] Client config found, loading data.
[23:09:08] Starting GUI Server
[23:09:55] Completed 1%
[23:10:36] Completed 2%
[23:10:36] mdrun_gpu returned
[23:10:36] NANs detected on GPU
[23:10:36]
[23:10:36] Folding@home Core Shutdown: UNSTABLE_MACHINE
[23:10:41] CoreStatus = 7A (122)
[23:10:41] Sending work to server
[23:10:41] Project: 5768 (Run 5, Clone 234, Gen 147)
[23:10:41] - Read packet limit of 540015616... Set to 524286976.
[23:10:41] - Error: Could not get length of results file work/wuresults_01.dat
[23:10:41] - Error: Could not read unit 01 file. Removing from queue.
[23:10:41] EUE limit exceeded. Pausing 24 hours.
[23:13:50] ***** Got a SIGTERM signal (2)
[23:13:50] Killing all core threads
Voodoo Rufus
03-03-09, 01:05 AM
Update:
I swapped the cards in their slots and downgraded the drivers to 182.06. The problem core made it to 15% before NAN'ing out and then maxed it's EUE limit for the day again.
Running Furmark yielded no errors so I'm thinking it's most likely drivers, not hardware.
I take it you were running the 185.xx beta drivers before downgrading?
Voodoo Rufus
03-03-09, 10:04 AM
Correct.
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