Personal computing discussed
Moderators: renee, morphine, SecretSquirrel
cuethenoise wrote:Nvidia control panel messes up the clock speeds sometimes and it can get stuck in idle. Open nvidia control panel>Manage 3D settings>Set power management mode to high performance and reboot. Also what version of windows are you running?
DPete27 wrote:Did I miss the part where you concluded Oldie broke its hip, you physically disconnected it, and everything ran fine using only Newie?
Have you ruled out a PSU issue? For instance, have you tried swapping the aux power from one GPU to the other to rule out that one set of 8-pin PCIe didn't die on you? Are you using the 4 single PCIe 8-pin cables that came with your PSU and not the single-to-double ones? Or if you are using the double 8-pin cables, only one 8-pin connector per cable should be plugged into the GPU.
DPete27 wrote:Did I miss the part where you concluded Oldie broke its hip, you physically disconnected it, and everything ran fine using only Newie?
Have you ruled out a PSU issue? For instance, have you tried swapping the aux power from one GPU to the other to rule out that one set of 8-pin PCIe didn't die on you? Are you using the 4 single PCIe 8-pin cables that came with your PSU and not the single-to-double ones? Or if you are using the double 8-pin cables, only one 8-pin connector per cable should be plugged into the GPU.
drwho wrote:I thought Nvidia no longer supported SLI .. and are you using the "correct" bridge ....
e.g. https://www.amazon.co.uk/adapter-flexible-PC24-Shop-Service/dp/B00576ESX2
xiashilang wrote:I do use a cable with 2 8 pins. My package came with 4 pcie cables they are all have 2 8pin; I dont have 4 cables with single 8 pin..
drwho wrote:I thought Nvidia no longer supported SLI .. and are you using the "correct" bridge ....
e.g. https://www.amazon.co.uk/adapter-flexible-PC24-Shop-Service/dp/B00576ESX2
DPete27 wrote:xiashilang wrote:I do use a cable with 2 8 pins. My package came with 4 pcie cables they are all have 2 8pin; I dont have 4 cables with single 8 pin..
Just an FYI, I found that info in this Jonnyguru review of your exact PSU. Apparently the cabling requirement is in the "manual" (pssh, who reads those). The stock GTX1080Ti carries a 250W TDP
roncat wrote:Hard to believe it's a cable problem based on your description, especially since the setup had worked fine prior with the same cabling configuration.
I vote broken hip... either the power supply or the card. If it is a thermal failure in the GPU, likely it will go from room temperature to meltdown in seconds, faster than the typical temperature monitoring software will ever catch. The internal throttling code will catch a thermal issue, and react accordingly.
DPete27 wrote:No doubt there are other more probabilistic avenues of failure than cabling. I was reading the JonnyGuru review and saw that bit of info, which I figured few people would take notice of while building (I would personally steer away from that to reduce cable clutter without thinking much of it), so I figured I'd throw it out there as a PSA. Apparently the provided split 8-pin cables aren't quite thick enough to handle >225W "safely" in the interest of preserving cable flexibility. In that same vein, I wondered if the terminals on the back of the PSU have similar current limitations, so pulling more than 225W from a particular 8-pin terminal may be detrimental.
OP, have you tried the " Open nvidia control panel>Manage 3D settings>Set power management mode to high performance and reboot." suggestion?
xiashilang wrote:stress test for 10+ hours with furmark and no issues.... it's just once it gets stuck at low clock speed (unpredictable), you can't get out of it.
xiashilang wrote:found a driver that made I stress tested it with furmark for 12 hours and both cards were running at max with a drop for that entire duration. The problem comes back this morning after I update to the new nvidia driver...
DPete27 wrote:xiashilang wrote:stress test for 10+ hours with furmark and no issues.... it's just once it gets stuck at low clock speed (unpredictable), you can't get out of it.
Missed that before in the Oldie/Newie discussion.xiashilang wrote:found a driver that made I stress tested it with furmark for 12 hours and both cards were running at max with a drop for that entire duration. The problem comes back this morning after I update to the new nvidia driver...
That would be the golden spike right there. Don't you think? Driver problem. Go back to that older driver. I'm pretty sure DOTA 2 is about as optimized as it can get at this point
DPete27 wrote:I've been avoiding this, but please tell me this (SLI) is worth all the trouble since you're using a 4k display.
Airmantharp wrote:DPete27 wrote:I've been avoiding this, but please tell me this (SLI) is worth all the trouble since you're using a 4k display.
Only thing that'll get you close to running sub-16.7ms frametimes (solid 60FPS) is a US$3000 Tesla V. 1080Ti SLI is as good as it gets, and it's still not really fast enough]
Waco wrote:Sorry for catching up late (and I haven't read every single post) - but are the BIOS versions the same between the two cards?
Waco wrote:There are a variety of ways to backup and flash firmware/BIOS. It might be worth asking ASUS if they have a preferred/supported tool. You could backup the existing BIOS on the oldie and flash the BIOS from newbie onto it to see if things change. I used to do this a lot when matching cards for SLI to ensure clocks were as identical as possible.