Lenovo D20 GTX 1080 SC plus Random closures - also, what are these thermal sensors?

I have a Lenovo D20 workstation, I upgraded my GTX660 to a GTX1080 and started having some weird random offs of the power system.

I bought the card on October 21 to run Civ 6 better, fine installed map and ran for three days without any problem.

The third day, the system itself off the power run game. No BSOD, no warning of any kind, just don't click off.

Done a lot of troubleshooting and seemed to track down for a thermal problem, because once I did a full clean and system fans and back together, everything worked...

Flash forward another 2 weeks, mid-game Civ 6, stop at random one another down. System still clean as a whistle...

It's now a battle since to maintain the system for more than a few days sometimes for a few minutes as it will at the same time more and more.  Last hour of Gears of War 4, exactly the same task.  Thinking it is thermal, I upgraded to something bigger heatsinks (fans work normally same towers / etc), system is now 20 degrees cooler and I still get the random low stop...

Thought that's current partner, if I traded in my PSU I have for my box of spare prod... No effect.

Thought the card was dead, so I traded in my old GTX660, the system worked flawlessly...  Swapped the D20 1080 another that I have here, and it worked perfectly fine solid launch an automated Civ game 3 days...  Swapped the 1080 in my D20, worked for another 3-4 hours, then click power off.

I continue to roaming to heat I have some temporary sensors which seem to put the wrong mistakes, I have one that always is at about 128C called "Remote1" 2 other D20, I have here do not have this sensor, I literally stripped everything out of the box and the sensor "remote1" remains.  Where is it?  (see attached photo)

HW_Monitor shows my CPU nice and cool... SpeedFan shows a CPU @ 31 c and the other at 101 c, the two seem well in HW monitor. Am I an overheating? OR am I not?

Here is my complete listing of the system:

D20

2 x X 5675-3, 06 Ghz

48 GB DDR3 RAM

GTX1080 HC 8GB

LSI/3ware 9650SE RAID card w/5x3TB

Kingston 240 GB SSD (boot drive)

I did the following diagnosis:

Added new radiators - thermal. (Works great with GTX660, not with the 1080).

Re-sitting all the RAM, I even changed a lot.  Memtest passes.

I removed the RAID card and associated hard disks. (I thought that's where they get "Remote1".)  It isn't.).

I tried the two 16 x slots in the system.

I ran a full stress test using the handbrake and P95 to try to make the system draw as much power as possible to stress the CPU/PSU/MEM, wanted to test the GPU at the same time so I ran a civ 5 automated and civ 6 interactive game. It ran for several hours and clicked itself turned off AFTER I had finished the stress on the CPU... (I killed the brake hand and P95 and just got Civ execution).

I swapped the power supply with a known good unit.

I placed the 1080 in a solid known D20 chassis, no problem.

I checked the mobo for swelling / leaks / breath caps. No there that I can see.

I ran the sound system high mode and fan speed used same used maximally all fans, always off System... All time seemed cool except "Remote 1". Read local 66 c.

I changed the bars that I use.

I changed the wall outlets that I use.

I entirely cleaned the system and all associated fans.

I tried ALL video pilots...  I have done so of restorations and clean installs Windows bored me.

Windows provides no newspaper except to say "power has been removed from the system or the system became unresponsive.

BIOS is like a power failure and will reboot the system (once I put it to turn on automatically).

I'm at the point where I'm going to empty the entire chassis and start over again because its so intermittent and so random that I can't pinpoint the problem.  When you look at Speedfan, the a 'CPU' that says its 101 c, when he goes to 110 c, that seems widely when the system will be eager to stop, he stopped at a few times and 115C, but HW_Monitor still reads the CPU is also nice and cool, with cores running between 35-40 degrees Celsius, not anywhere near 100 101 c...

I spent several hours on it and still can't seem to find answers that are concrete...

Someone at - it ideas?  Someone has ideas on what/where all these thermal probes are?

Can someone give me any ideas would be great...

Hello

First of all, thank you guys for getting back to me so fast, I know that you guys must be flooded and I really appreciate your support on my aging material.  You are a credit to your teams.

So I'm in the mode full tinker now, and as I am not under warranty, it is not as if I had nothing to lose = D.

I think I have tracked down the problem - but I said at least 6 times in the last few weeks.

The EVGA GTX SC 1080 has a metal radiator that runs the length of the card, these fins are exposed along the law and the length as a vent along all sides of the map, the side exposed to the door frame and the side which is exposed to the motherboard. There are also a few air holes in the top (bottom?) of the map. When the GTX 1080 is seated in the slot 16 first x, all the heat from the back of the card is discharged directly on the North Bridge heat sink.  This seems to be what it heats up a lot, and why the 660 fact ever, the events don't go anywhere near him.   In fact, I removed my GPU right after a stop down and the NB heatsink was hot touch was a 3 degree burn.

so I tied a 40mm fan on the heatsink to the Northbridge PCI, he turns to 4000-5000 + rpm and managed to cool the heatsink about 30 degrees, it starts as 65 degrees rather than 95 and revolves around 82-85 under a load of game...

I'll keep you posted on the tests.

Tags: ThinkStation

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