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NVIDIA GTX 1080 Ti Owner's Club - Page 534

post #5331 of 10842
I ran SuPo off a USB drive (hate installing anything unnecessary on a gaming rig, now that's ocd smile.gif ), this is FE bios getting absolutely crushed smile.gif

2100 stable gaming setting (some games just really bad)



2100 but curve tweaked to try and keep clocks as high as possible 4th run



2138 my game(s) can't handle this, go figure wink.gif



could tune that better, but it only got above 2088 when the load wasn't bad enough to power limit.

Will try Asus for comparison
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post #5332 of 10842
Quote:
Originally Posted by Nico67 View Post

I ran SuPo off a USB drive (hate installing anything unnecessary on a gaming rig, now that's ocd smile.gif ), this is FE bios getting absolutely crushed smile.gif

2100 stable gaming setting (some games just really bad)



2100 but curve tweaked to try and keep clocks as high as possible 4th run



2138 my game(s) can't handle this, go figure wink.gif



could tune that better, but it only got above 2088 when the load wasn't bad enough to power limit.

Will try Asus for comparison

Can you share your vintage curve? Are you on a water block?

Yeah let me know how the Asus bios goes for you.

I'm going to shunt mod asap, I don't want to think about the power limiting stuff anymore
post #5333 of 10842
Quote:
Originally Posted by SlimJ87D View Post

That's interesting, what can you be doing to get the extra 30 watts that no one else can't.

The blower like I said can use 12 watts and the led, there's that also. If I measured 310, and you get an extra 10 from not running those, the other 10 I'm not sure.

out of 4 of us that actually took measurements, you're the only one that gets more watts. Hardware wise, the only difference I can see is you're on full water and no blower running. Software, not sure either.

So you're hitting 119% on the Asus bios? I'm on my phone so I can't check your GPU-Z right now.

One thing to remember is that all of these BIOSes actually have 4 separate power limits. The overall main limiter is the one that everyone talks about, but there are also individual limiters for each of the 3 +12v sources (PCIe motherboard slot, and each of the two PCIe power connectors)

Every PCB design routes power differently. One might power the memory VRM, RGB lighting, the blower fan, and other miscellaneous stuff from the PCIe slot, and have all of the power phases for the VCore VRM come from the two PCIe power connectors.

In that case, overclocking and overvolting the core is really never going to increase the power draw from the PCIe slot, and so you'll never hit that particular limiter.

On the FE, I highly suspect that at least one, if not two of the VCore phases are connected to the PCIe slot, and everyone is running up against that limiter. Unfortunately we currently have no way to tell whether this is the case in software. An intrepid adventurer could take an accurate multimeter and probe the 5 milliohm shunt resistor for the PCIe slot while under a constant heavy load with the power limiter maxed out.

The power limit for PCIe slot +12v is 78w on both the FE and the ASUS Strix BIOS with the slider maxed out.

78w equates to 6.5 amps of current at 12v.
6.5 amps of current running through a 5 milliohm resistor would cause a voltage drop of 32.5mV.

If you see 32.5mV across the shunt resistor for the PCIe slot (or very close to) then you're likely hitting that individual sub-limit and not the overall limit.

Edit: Actually, I forgot how peaky the current draw is from the VRM phases. A multimeter isn't going to be enough, you'd need to have an oscilloscope with an integrating/averaging function. Sorry if I got anyone's hopes up!
Edited by ThingyNess - 4/13/17 at 7:22pm
post #5334 of 10842
Quote:
Originally Posted by ThingyNess View Post

One thing to remember is that all of these BIOSes actually have 4 separate power limits. The overall main limiter is the one that everyone talks about, but there are also individual limiters for each of the 3 +12v sources (PCIe motherboard slot, and each of the two PCIe power connectors)

Every PCB design routes power differently. One might power the memory VRM, RGB lighting, the blower fan, and other miscellaneous stuff from the PCIe slot, and have all of the power phases for the VCore VRM come from the two PCIe power connectors.

In that case, overclocking and overvolting the core is really never going to increase the power draw from the PCIe slot, and so you'll never hit that particular limiter.

On the FE, I highly suspect that at least one, if not two of the VCore phases are connected to the PCIe slot, and everyone is running up against that limiter. Unfortunately we currently have no way to tell whether this is the case in software. An intrepid adventurer could take an accurate multimeter and probe the 5 milliohm shunt resistor for the PCIe slot while under a constant heavy load with the power limiter maxed out.

The power limit for PCIe slot +12v is 78w on both the FE and the ASUS Strix BIOS with the slider maxed out.

78w equates to 6.5 amps of current at 12v.
6.5 amps of current running through a 5 milliohm resistor would cause a voltage drop of 32.5mV.

If you see 32.5mV across the shunt resistor for the PCIe slot (or very close to) then you're likely hitting that individual sub-limit and not the overall limit.

Edit: Actually, I forgot how peaky the current draw is from the VRM phases. A multimeter isn't going to be enough, you'd need to have an oscilloscope with an integrating/averaging function. Sorry if I got anyone's hopes up!

I'm just going to shunt mod and leave this all behind me.
post #5335 of 10842
Can anyone tell me what is the max resolution I'd be able to achieve with the included DisplayPort to DVI adapter?

I'm using an older 30" 2560x1600 panel
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post #5336 of 10842
I have done the shunt mod, but i only put CLU on those 6+8 pin shunts and now during Furmark i can hit 105% TDP in MSI AB, but GPU-Z only shows ~68% TDP on stock FE BIOS and i can see power limit being the limiter during Furmark. Shunt mod obviously works, because i have a AX860i PSU with Power monitoring and the power draw is ~50W higher now running 1924/1949MHz in Furmark instead of 1800-1860MHz before.

Actually when i did the shunt mod i had the Strix BIOS loaded in it and i have seen the same behavior in MSI AB and GPU-Z, but the power draw was the same, simply like if the shunt mod wasn't working and as i suspected flashing back stock BIOS solved the issue and made shunt mod working, so obviously Strix BIOS and Stock FE BIOS are handling power management differently, maybe it has something to do with the fact that i didn't put CLU on the PCIE shunt?
post #5337 of 10842
Thread Starter 
Quote:
Originally Posted by SlimJ87D View Post

Quote:
Originally Posted by KedarWolf View Post

I think it depends how you stress test the card the power draw you get, why I used a maxed out custom TimeSpy test.

Are you hitting and holding 119% on the Asus bios now? Because you have previous post where you said you weren't going above 108-110%, and if so what could have changed?

I said when running Heaven I wasn't going over 111% which is good, you DON't want to hit the power limit or you'll throttle, lower is better.

But when I'm stress testing with TimeSpy I'm getting 120% off and on which I was doing to test to see if I was getting the 330+ watts which I was.

You'll never get a sustained 120% unless you can find a stress test that pulls that kind of load and I haven't found one that does yet.

I DID hit 120%+ off and on regularly running the custom TimeSpy, it jumps all over the place though.
    
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post #5338 of 10842
Temps seem nice and just poked in afew numbers and it seems stable thus far. will tweak it more. +170 and it crashes in heaven after 20 min. Not sure if adding more voltage will help.


This is after i think it was 45 min of heaven running.

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post #5339 of 10842
Results for Asus bios,

2100 tuned to same as FE or close enough



Note to get anywhere near FE bios I added +100 more to the mem clk, Asus doesn't power limit as much but I'm still hitting it around 111% even if it can spike past to 114%


2138 although I think it was going as high as 2152



115% and massively power limited

Asus clks higher or I should say further than FE, curve would be similar but the little extra power allows it to use a few more bins, performance for me at least is not as good as FE and I feel that's because they soften some settings to allow for bigger clks on core and mem that take more voltage and power but probably end up at a similar result with tweaking.

Quote:
Originally Posted by SlimJ87D View Post

Can you share your vintage curve? Are you on a water block?

Yeah let me know how the Asus bios goes for you.

I'm going to shunt mod asap, I don't want to think about the power limiting stuff anymore

26c temps are full titan block on chilled water cooler system. curve is defaulted, then raise,

1.000 - 2075
1.011 - 2075
1.025 - 2088
1.031 - 2088
1.043 - 2101

then flat at 2101

just see if you drop lower than 2075 in my case, and if so raise the next voltage down to minimize the loss.

Hopefully the shunt mod works, or we get a full unlocked Asus bios, I could work with that smile.gif
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post #5340 of 10842
Quote:
Originally Posted by DStealth View Post

Just received my MSI 1080ti Gaming X card ...seems nice at glance with stock cooling out of the box ~2100/12k will retest this days again FS GPU score is close to 32k thumb.gif


Edit: Just hit the 117% power limit with thеsе settings...anyway the score looks good to me 11136 GPU ..biggrin.gif
Exceeded 32k GPU(32.3 actually) on air with 1.05v + full fan speed in order stay below 50* and constant 2076/12000 clocks biggrin.gif



Edit: Validation on FS - http://www.3dmark.com/fs/12318972
Edited by DStealth - 4/13/17 at 9:32pm
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