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2080Ti Overclocking (...woes)

dvs8

dvs8

dvs8

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Joined
8 Mar 2010
Posts
98
Morning all !

I couldn't find a thread specifically about overclocking this card so thought I'd start one having received my Palit 2080Ti OC from OcUK over the weekend: https://www.overclockers.co.uk/pali...ddr6-pci-express-graphics-card-gx-04b-pl.html

Not a great start as it didn't want to play nicely with a secondary display but after swapping around DP cables in the back of the card got both my PG348Q and AOC G2460PQU working at full resolution & refresh rates.

Once that was sorted, fired up the latest beta of MSI afterburner as per this overclocking guide and ran the OC Scanner test. That found an average OC of 163Mhz on the core, not bad, however... furmark is giving hard resets when doing anything other than a stock clock stress test. Even at stock clocks but with power limits raised the machine hard reboots. First thought given no BSOD was power issue but the PSU is (seemingly) rock solid - Corsair HX850i and when running AIDA CPU stress test and Furmark the reported wattage is still below 500W. Example 'screenshot' showing all stats here (I had to take a photo as triggering the screen-snip overlay in W10 was enough to trip the fault). This is how the GPU is installed: split 2x8-pin connectors off the PSU.

Prior to GPU upgrade I was running an overclocked 1080Ti and 7700k @ 5Ghz, rock solid stability wise.

Anyone had any other experiences on this?

Cheers :(

dvs
 
I am not sure who the OEM is on that PSU, I know Corsair use CWT for some which are not great quality. Is the HX850i a digital unit? If so I do remember 8 Pack absolutely not recommending them for overclocking, so its possible the RTX is just drawing too much AMPs for it to cope. :(
I also know RTX draws huge power when overclocked, if you have tried running it from separate rails then there is not much more I can suggest other than maybe trying a different PSU, but a quality PSU such as Seasonic, Superflower, Kolink are all better engineered on the high-end units and very capable.
 
It is a digital one - I must admit it's a bit wounding to hear that my £195 PSU which should be at the high end is not good enough to run 1x GPU! (as an update, just ran furmark stress test at stock clocks and it's still triggering hard reboots). I'll check the wiring between PSU and GPU, multi-rail might be the answer... will update.
 
I would suggest not using the split 2x8 pin connectors for the GPU but their own connector straight from the PSU.

As Gibbo has noted these 2080Ti can draw some high power, especially when overclocked. But nothing that your PSU shouldn't be capable of delivering.

Your PSU, if working as spec, should be more than fine. You could use HWinfo64 to monitor the 12v rail whilst under load. You could also use the Sensor page in GPU-Z to see the power consumption and the PerCap reasons. My HX 850 Corsair PSU needed replacing (original model version) as it would drop down to 11.2v when under heavy load. The tolerance is 5% on the 12v rail - so 11.4v to 12.6v - IIRC.
My PSU fitted now hardly changes from 12.096v, regardless of load.
 
I'd be weary of using multiple rails . a single rail on a good PSU is the way to go still IMO . tbh though I'm finding I don't get instant lock ups with my GPU ... Just a lot of artifacting . anything higher than 2090 on the core caused black hole artifacts ... But I'm on a low wattage PSU so maybe that's the awnswer for my issue .
 
MasterOC said:
I'd be weary of using multiple rails . a single rail on a good PSU is the way to go still IMO . tbh though I'm finding I don't get instant lock ups with my GPU ... Just a lot of artifacting . anything higher than 2090 on the core caused black hole artifacts ... But I'm on a low wattage PSU so maybe that's the awnswer for my issue .
Click to expand...

This. Always single rail PSU for high-end graphics cards, particular if overclocking.
It should be fine stock, but from our testing the RTX has huge power draw and when you overclock it, then the power draw can be like over 500W, they are absolute monsters.
 
I would not use furmark as a stress test to be honest... I would play your games.

Nvidia cards for a long time have smashed out some serious power consumption when you overclock and raise limits. The 2080Ti especially is the most thirsty yet with the extra cores really drinking the juice and heating the room!!

The symptoms you have do really sound like a PSU issue. But I would check entire system also. So load defaults in Bios before doing any other testing. Then play your games at stock GPU clocks and then overclocked and see how it goes.

My tip with PSU's is single rail, analogue controller, one cable from the psu per connector on the card. If you need to replace a PSU adhering to these rules is your best option around 850w of Superflower, EVGA or Seasonic being the ones I would go for.

Just as a guide OrionX2 is running 4x 2080Ti cards all OC to 2125mhz+ , 7980XE at 4.6ghz and 8086K at 5.2ghz all on 1600w Superflower PSU. Its going to America this one so we could not use the 2000w but 1600 Superflower Titanium no problem!!!
 
Not sure why people are posting about multiple rails - unless it is in response to me suggesting to not use the 8 pin splitter....?

As 8 pack noted, and I mentioned, I would use one one connector from the PSU to each of the 8 pin connectors on the GPU.

As the GPU is very power demanding I would have thought that it could be possible to draw more across the single (but split at the plug) 8 pin lead than both the lead (not sure on that PSU but it could be 18 AWG) and the 8 pin plug is designed to deliver, even tho some of the power is coming from the PCI-Express slot.
 
8 Pack said:
Just as a guide OrionX2 is running 4x 2080Ti cards all OC to 2125mhz+ , 7980XE at 4.6ghz and 8086K at 5.2ghz all on 1600w Superflower PSU. Its going to America this one so we could not use the 2000w but 1600 Superflower Titanium no problem!!!
Click to expand...

So is that running SLI over the bus without any NVLink?
 
UPDATE: FIXED! (this declaration will undoubtedly come back to haunt me).

So the Corsair Link software defaults to Multi-Rail mode. I found THIS post which pointed me to the configuration being the problem. In my case, making the change seems to have sorted it - the card now OC Scan's & overclocks at full power/temp limits and furmark runs. Maybe worth a PSA for Corsair owners who buy this card - never had this problem on a previous GPU but as you guys say the 2080Ti is a bit of a beast apparently
 
That must be a feature of the newer HX850 - with the i probably meaning that type of control.

Great result for you there, now enjoy :)
 
They say this Winter going to be really Cold in the UK, So get your RTX - Room Temperature Xtreme Card(s) Fast :)
 
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I agree with 8 pack I wouldnt necessarily take notice of Furmark its even been known to bork graphics cards. If mine runs okay in 3dMark, one of the Uniengine benchmarks and games its okay for me.
 
dvs8 said:
UPDATE: FIXED! (this declaration will undoubtedly come back to haunt me).

So the Corsair Link software defaults to Multi-Rail mode. I found THIS post which pointed me to the configuration being the problem. In my case, making the change seems to have sorted it - the card now OC Scan's & overclocks at full power/temp limits and furmark runs. Maybe worth a PSA for Corsair owners who buy this card - never had this problem on a previous GPU but as you guys say the 2080Ti is a bit of a beast apparently
Click to expand...
Which version of Corsair Link are you using? I am about to setup 2 machines both with HX850i and 2080Ti when the cards arrive next week, so would be useful to have this info before I start :)
 
dvs8 said:
Corsair Link 4.9.7.35 on Windows 10 1809 Build 17763.1 :)
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many thanks kind sir

My biggest concern at the moment is fall update (which is just around the corner) is gonna come and rip us all a new one just after we have carefully setup and configured our shiny new things...

There are some things you can guarantee in life:

Death
Taxes
Wives costing an astronomical amount of money
Regretting getting married
NVidia and Apple prices being high
Microsoft completely ******* up every major release or service pack/update they release...

(oh and Google/Facebook being utterly evil)
 
VincentHanna said:
Build 17763 IS the fall update (RC5)

I did a fresh install with it very recently and it's all good.
Click to expand...
I thought it wasn't due for a couple of weeks yet?

I have been using my Mac since I donated my 980Ti to the wife for her twitch rig (I couldn't stomach windows at 30fps @4k on the R9 390X) so my Windows machine has been sat gathering dust waiting for the Nvidia refresh; so I am not particularly up to date when it comes to Windows patches.
 
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