20219348762341
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This is second time in a month that this has happen, all of the sudden my 4k BenQ BL3201 losing signal and shortly after that PC restarts on its own  All stock clocks, ambient temp is 22C, no overheating, everything is WC including M/B VRMs and Chip Asus Rampage IV Black i7 4960X, between all cores 22-23C idle and around 35-37C full load 3 way SLi Titan Black Sc with heatkiller blocks, cards 24-25C idle and 38-39C full load 64GB 1866 Dominator Platinum Ram 2 x brand new Seasonic 1200 Platinum connected to start together, 1 powers 2x D5 pumps, Aquaero 6XT, 2x 1T Sumsung Pro 850 SSD's, 4x 1T Velociraptor HDD, second PSU its dedicated only for GPUs. Checked all cables for loose ends, nothing wrong, everything has been running great for over a year and it just started maybe month ago. Has anyone experience the same thing and can help me, please  Thank you
post edited by AWK16 - 2015/10/07 12:18:27
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/07 12:18:40
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What are you doing when this happens? What OS are you running? Have you tried any different gpu drivers?
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/07 12:20:57
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Sorry I should have mention, Windows 7x64 Pro. Once happen when I was just reading my documents and listening music in a background then today when i was browsing net, and yes I just installed new 355.98- drivers I'm not saying drivers is the problem, but could they cause this symptoms
post edited by AWK16 - 2015/10/07 12:26:14
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/07 12:31:25
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AWK16
Sorry I should have mention, Windows 7x64 Pro.
Once happen when I was just reading my documents and listening music in a background then today when i was browsing net, and yes I just installed new 355.98- drivers
I'm not saying drivers is the problem, but could they cause this symptoms
Yes, it's possible. Try some older drivers, you could also try the newly released 358.50 driver.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/07 12:40:51
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I just looked at my backup windows ISOs and this was never the issue with drivers 350.12 which was about 2 months ago, then I installed the 355.98 and ever since I had 2 of this scenarios of windows restarts
Maybe its coincident I hope not and the drivers really gave me the issue. I will restore my windows to the time I had everything working nicely and that is with the 350.12 drivers, we will see then.
Thank you for your quick response to my question I will report back if that happens again in meantime if anyone have more ideas, please share.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/07 13:29:11
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Yes, it's possible. Try some older drivers, you could also try the newly released 358.50 driver. You initiated the idea of my issue, thanks. Ever since I got my new BenQ 4K monitor occasionally I have been losing signal( I should have mention that before) and I'm sure it's the DP cable, but that never really bother me as I don't play games so if I loose signal for a minute and it was very occasionally, no big deal and all my work gets backed up instantly if PC happens to crash/restarts for any reason, but all I had to do is touch the cable at the back of the monitor and signal would come back, btw. I need to get good Qty DP cable any subjections? Anyways, ever since Nvidia introduced TDR, which I think came with 353 drivers, please correct me I could be wrong but the default set of drivers/signal recovery is 2 seconds and that's about the time takes for my pc to reboot after losing signal. Went back to older drivers until I get my DP cable in place.
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RainStryke
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Re: Loosing Monitor signal and PC restarts
2015/10/08 02:14:41
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Sounds like you need to isolate the problem. IMO it sounds like a power issue...
Don't know what motherboard you have, but some have PCI-E switches to allow you to troubleshoot the video cards without having to removing them from the case. I'd suggest looking into that first...
From the system specs you've listed, a single 1200w PSU can handle everything you have... I'd try running everything off just one of the PSU's and remove the second one that you have linked up. If you still have the same issues, switch PSU's...
Your system shouldn't take anymore than maybe 950w under load... which your PSU can handle a full 1200w load without causing degredation... You have plenty of headroom with just one PSU in place.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/08 06:05:18
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Almost 1100W... it's been pulled by 3 GPUs and CPU alone on full load and that doesn't include 4 x Velociraptors 2 x SSDs, 2x D5 pumps and 21 fans and system it's on stock, so no, 1 PSU it's not nearly enough. Also I never had even slight issue with Samsung generic monitor but I was also using HDMI so I'm not sure if it's the monitor or cable. As I was looking for help online I came across forum with ppl having the exact monitor and few guys had similar issue, some flickering vertical lines some Loss of signal. So far it's been OK I could get the signal back without restarting my machine but again with the new Nvidia TDR that became issue. The thing is if I lose a signal I can bring it back by turning power OFF and ON and toggling between HDMI and DP on screen soft touch keys that are beside power button, so that means it has only to do with part of monitor and connection in there, wouldn't you think
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/08 10:08:43
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AWK16
The thing is if I lose a signal I can bring it back by turning power OFF and ON and toggling between HDMI and DP on screen soft touch keys that are beside power button, so that means it has only to do with part of monitor and connection in there, wouldn't you think
Yep.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/08 12:04:27
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Just found some users at hardforum with exact monitor having the same issue: "I have this monitor and I've suffered through the occasional flicker (not a big deal), but my screen is suddenly blacking out for a second or two at random intervals (this is a big deal). Has anyone had this happen to their BL3201PT? It's happening every couple of minutes, it appears."
In my case happens less frequently but it does. I guess this thread can be closed as it seem to be monitor related. Thanks
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RainStryke
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Re: Loosing Monitor signal and PC restarts
2015/10/08 13:44:44
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AWK16
Almost 1100W... it's been pulled by 3 GPUs and CPU alone on full load and that doesn't include 4 x Velociraptors 2 x SSDs, 2x D5 pumps and 21 fans and system it's on stock, so no, 1 PSU it's not nearly enough.
Also I never had even slight issue with Samsung generic monitor but I was also using HDMI so I'm not sure if it's the monitor or cable.
As I was looking for help online I came across forum with ppl having the exact monitor and few guys had similar issue, some flickering vertical lines some Loss of signal.
So far it's been OK I could get the signal back without restarting my machine but again with the new Nvidia TDR that became issue.
The thing is if I lose a signal I can bring it back by turning power OFF and ON and toggling between HDMI and DP on screen soft touch keys that are beside power button, so that means it has only to do with part of monitor and connection in there, wouldn't you think
You are overestimating the power your system uses or you are gauging it by A/C power used and not D/C... GTX Titan Black's pull about 250w per card and your CPU pulls about 216w at stock speeds. Your two pumps use less than 50w and your 21 fans maybe use 100w and your other drives maybe use 60w... That would put you just below 1200w which your PSU can support with ease according to this review: https://www.techpowerup.com/reviews/Seasonic/P1200/5.html They even pushed it to a 1300w load and it stayed nice and cool... Ripple levels were still in safe ranges, voltage regulation was solid.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/08 13:58:07
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I don't know where you get the info from  Titan Black SC running Unigine_Heaven for 2 minutes can pull as much as 399W, do the math. Why running so close to borderline line and hoping It will be fine and even slight OC and you squealing. Anyways, this isn't about going overkill on PSU, better more then not enough.
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:18:48
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AWK16
I don't know where you get the info from Titan Black SC running Unigine_Heaven for 2 minutes can pull as much as 399W, do the math. Why running so close to borderline line and hoping It will be fine and even slight OC and you squealing.
Anyways, this isn't about going overkill on PSU, better more then not enough.
A single titan black cannot pull 400w by itself... http://www.guru3d.com/articles_pages/nvidia_geforce_gtx_titan_black_review,6.html
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:26:37
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:34:53
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:37:21
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A titan black is hardware limited to 300w. 1 8-pin = 150w, 1 6-pin = 75w + 75w from pci-e slot = 300w.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:44:57
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You right. Still when I run Valley It hits borderline and that's stock clocks. Having 2 PSUs it only gives you comfort of knowing there is more than enough power, but that wasn't my original concern. Although I didn't disregard the hint by RainStryke that maybe its power related, but it seem the topic have shifted to whether I need the second PSU or not  Thank you guys
post edited by AWK16 - 2015/10/08 14:47:04
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/08 14:47:28
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Haha. Yeah. Now the thread can be closed. =)
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/09 16:58:05
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Since this thread is not locked yet I thought I would add one thing that I don't know if it's good or bad, but definitely mysteries as many people with this issue still can't figure out what exactly is the cause of it. This monitor signal loss and monitor going black seems to be wide spread among different brands of monitors ( Asus, BenQ, Dell) and among different brands of GPUs (Nvidia and AMD) and also not only related to DisplaPort cable but HDMI and DVI as well. Some people say that ever since at one point of GPU version drivers they updated to this started, some are thinking it has something to do with windows update..... I changed my monitor about 5-6 months ago from Samsung 1080 to BenQ 4K and until then I have never had any of this issues, but ever sense then I also updated Drivers and did a lot windows updates I don't know if its coincident or what. Last night I cleared CMOS and so far there was no sign of any glitch, but again it might happen days from now. Btw. BenQ wants to send me a new monitor, but from what I read this might be a waste of time, we will see. Question, can you disable or set delay time apart from 2 seconds for the TDR to do its job of drivers recovery or PC reboot? Thanks
post edited by AWK16 - 2015/10/09 17:09:12
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/09 17:46:48
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/09 21:14:52
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Thanks, that should temporarily solve the reboots issue 
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XrayMan
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Re: Loosing Monitor signal and PC restarts
2015/10/09 21:28:48
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Hopefully there will be a permanent solution soon for you too.
My Affiliate Code: 8WEQVXMCJL Associate Code: VHKH33QN4W77V6A   
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/10 08:47:21
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Is clearing CMOS at the back of motherboards IO, there is reset CMOS in Rampage IV Black, would that be any different from resetting to default thru BIOS?
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/10 12:51:50
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AWK16
Is clearing CMOS at the back of motherboards IO, there is reset CMOS in Rampage IV Black, would that be any different from resetting to default thru BIOS?
They both will reset settings back to default settings.
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bcavnaugh
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Re: Loosing Monitor signal and PC restarts
2015/10/10 19:20:19
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I have to remove the Power Cables sometimes to get mine back and or the display on the correct Monitor.
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/11 05:50:56
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I have to remove the Power Cables sometimes to get mine back and or the display on the correct Monitor. Do you still experiencing the disconnections? Because so many ppl have that problem it's really hard to pin point the cause of the issue. Some have replaced PSUs, GPUs Monitors and even M/B all together and they were good for day or two and after all went back to original problem, that is with AMD and Nvidia cards and like I said different monitors as well. The other day I run Valley 4 on all settings MAX 3840x2160 for about 40minutes continuously, the only thing I had to do is to disable anti surge in bios as its really sensitive, if I didn't it shots down my PC and Asus warns about surge prevention afterwards. But anyways I run for about 40min and not a one glitch, all 3 cards staying at 41-43C. Reason I'm bringing that up because for minute I thought maybe there is something wrong with one of my cards, but I tried all separately, not one issue and they stay nice and cool. My CPU never ever gets any hotter than 40C running Prime95 or intelburn, M/B never gets beyond 31C and PH 31C I even run memtest 6.2.0 for hours, not even one error. What I did the other day was I properly reformatted my SSD and reloaded ISO of my windows ( with older drivers) so I didn't have to take forever on installing everything, since yesterday not a one glitch, everything runs very nice and quiet, no disconnection, but again we will see in day or two. Maybe all what I did have nothing to do with the disconnections, we will see, still very mysterious. Sorry for the lengthy story  and I thought this thread was going to be locked
post edited by AWK16 - 2015/10/11 06:18:51
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bcavnaugh
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Re: Loosing Monitor signal and PC restarts
2015/10/12 19:44:15
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AWK16
I have to remove the Power Cables sometimes to get mine back and or the display on the correct Monitor.
Do you still experiencing the disconnections?
Because so many ppl have that problem it's really hard to pin point the cause of the issue. Some have replaced PSUs, GPUs Monitors and even M/B all together and they were good for day or two and after all went back to original problem, that is with AMD and Nvidia cards and like I said different monitors as well.
The other day I run Valley 4 on all settings MAX 3840x2160 for about 40minutes continuously, the only thing I had to do is to disable anti surge in bios as its really sensitive, if I didn't it shots down my PC and Asus warns about surge prevention afterwards.
But anyways I run for about 40min and not a one glitch, all 3 cards staying at 41-43C.
Reason I'm bringing that up because for minute I thought maybe there is something wrong with one of my cards, but I tried all separately, not one issue and they stay nice and cool.
My CPU never ever gets any hotter than 40C running Prime95 or intelburn, M/B never gets beyond 31C and PH 31C I even run memtest 6.2.0 for hours, not even one error.
What I did the other day was I properly reformatted my SSD and reloaded ISO of my windows ( with older drivers) so I didn't have to take forever on installing everything, since yesterday not a one glitch, everything runs very nice and quiet, no disconnection, but again we will see in day or two.
Maybe all what I did have nothing to do with the disconnections, we will see, still very mysterious.
Sorry for the lengthy story and I thought this thread was going to be locked
Yes but only with DP Cables and Not HDMI or DVI.
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XrayMan
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Sajin
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Re: Loosing Monitor signal and PC restarts
2015/10/12 20:25:22
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XrayMan
AWK16
Sorry for the lengthy story and I thought this thread was going to be locked
AWK16
I guess this thread can be closed as it seem to be monitor related.
Thanks
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20219348762341
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Re: Loosing Monitor signal and PC restarts
2015/10/12 20:29:10
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Well, its been 2 days and no issues  It really beats me on whats going on. The only thing Ive done different was reformatted SSD reset CMOS at the back IO and went back to older drivers 350.12 AWK16
I guess this thread can be closed as it seem to be monitor related.
Thanks
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