I think Igor is wrong.
Did some more testing just now in Path of Exile.
POE + Global Illumination Shadows = Ultra + Shunt Mod 3090 FE + Core overclock is the ONLY game that can crash black screen + Screaming fans (Beyond 100%, estimated 3000 RPM or 115% speed) a SHUNT MODDED 3090 FE at 114% power limit (800W). Probably from MSVDD overload.
GI Shadows = High will not do this.
Also, card below 500W will not do this on "Ultra" either. I think people need to check TDP Normalized% in hwinfo in "New World" and see if there is a problem with this game.
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There is MORE than one power limit on the card.
Not only that, the shunt resistors only shunt the INPUT RAILS that are fed from the main power rails to the main chips.
However there are more shunt resistors than there are main input rails.
On an 2x8 pin card, there's
1) 8 pin # 1
2) 8 pin # 2
3) GPU Chip Power (CPU Core NVVDD Input Power (sum))
4) PCIE slot power
5) MVDDC (FBVDD) / memory power
6) PWR SRC (Power Plane Input Source Power)
Shunt # 6 is bizarre because the SRC chip not only has its own power limit (Most cards set this to 150W at 100% TDP slider and 175W at whatever TDP is the max slider position, which then becomes normalized past 100% to scale from 150W to 175W), but the SRC actually has several of its own power limits which equal the # of 8 pins (!). The SRC power limit controls the maximum power that can be pulled from an 8 pin. This is DIFFERENET from the individual 8 pin power limits! The individual 8 pin power limits combined with PCIE slot power control the TDP VALUE when you add them. The SRC value however does NOT. The SRC value controls the max allowed from an 8 pin before a "TDP Normalized%" power throttle happens.
Even more bizarre is that the SRC power rail itself changes depending on the power coming from all the other shunts. If you do a shunt mod and you shunt a rail with poor soldering and bad contact, SRC may show LESS watts at full load than at idle. It can actually end up showing 0 watts at full load. This may also cause MVDDC (memory power) to also show 0 watts at full load. If you fail to shunt SRC, it may end up reaching its own power limit and throttling the entire card (VIA TDP Normalized%) or it can cause another rail to skyrocket (not a true reading btw) e.g. causing 8 pin #1 to report 175W and 8 pin #2 to report 80W, which triggers another power limit.
And these are just the shunts. There are more sub-rails, SOME of which when "summed" together, add up to one of the primary rails, and some which report only to "TDP Normalized" and are not exposed via NVAPI (but might be accessible via I2C with Elmor's EVC2X). All of the "Input" rails shown in HWinfo64 (both primary and secondary) respond to shunt mods. None of the "Output" rails respond to shunt mods. However MSVDD, NVVDD and PLL power rails also do not respond to shunt mods but ARE reported to TDP Normalized based on a "default" and "maximum" value.
I'm not talking about voltage rails. I'm talking about the main power rails themselves which feed them.
MSVDD drawing too much power relative to what MSVDD voltage is supposed to allow will report a high "TDP Normalized" power draw (with respect to TDP%) and cause GPU effective clocks to drop, relative to requested clocks. NVVDD drawing too much power relative to what NVVDD voltage (this is internal voltage, not VID - MSI Afterburner only supports setting VID) caused outright Power limit throttle by TDP normalized (without effective clocks dropping first).
Here is what MSVDD's unreported power limit does to TDP Normalized.
Path of Exile: 400W TDP (Shunt mod: Slider set to 58% TDP).
1) Shadows + Global Illumination Quality: High. TDP = 400W, 58% on TDP slider)
(Notice TDP Normalized%, TDP%, board power draw and the clocks).
https://i.imgur.com/FLAITFL.png
2) Shadows + GI = Ultra (TDP = 400W, 58% slider)
https://i.imgur.com/joz3YCc.png
Notice the difference in clocks and TDP Normalized, even though total board power remains the same.
3) Shadows + GI: High, 800W TDP, 150 mhz core, windowed, TDP = 114%
https://i.imgur.com/pO3sPMg.jpg
4) Shadows + GI: High, 800W, 150 mhz core, fullscreen, TDP = 114%
https://i.imgur.com/C853Rg5.png
5) Shadows + GI High, 800W TDP, 90 MHz core, fullscreen, TDP = 114%
https://i.imgur.com/nUnQJC7.png
6) Shadows + GI: Ultra, 800W TDP, +150 core clock (danger!), TDP = 114%
(Fullscreen).
https://i.imgur.com/EmvAsiD.png
I couldn't run this very long. I've black screened + 100% screaming fans before doing this at that TDP unless I lowered the clocks.
7) Shadows + GI: Ultra, 800W TDP (windowed), TDP = 114%
https://i.imgur.com/0yWpWTM.png
Please compare the TDP Normalized difference between the windowed Ultra and High tests.
Notice that on the ultra tests, the clocks and voltages are being throttled due to a high TDP Normalized even though total TDP is now here near 114% (hovering around 87% or so).
But look in hwinfo. Only the VID (NVVDD) is being throttled. SRAM voltage (MSVDD) is not being throttled. 1.013v NVVDD vs 1.094v MSVDD.
TDP Normalized starts throttling the clocks when any individual rail (in this case it's the unreported MSVDD / NVVDD rails!) Exceeds 108%. It starts mildly throttling the clocks.
Superposition 4k custom / Timespy Extreme has had TDP Normalized go up to 119% with some massive clock throttling. However neither of these programs managed to black screen 100% fan the shunt modded FE Card (at most it just crashes the driver).
But POE + Ultra + 800W TDP has managed to hard crash the power phases (past 90 mhz core clock overclock) because the MSVDD rail just gets overloaded with the power draw going way past 600W with temps past 75C. Card didn't die though but it was scary.
What I'm curious of is if New World is doing something similar. If it is, TDP Normalized should be able to report something being way higher than it should.
wenn in egal welchem Spiel egal welche GPU auf Volllast bei 13856fps geht, weil Spieleentwickler ZU BLÖD sind selbstständig einen Framelimiter für Menüs einzubauen. *grrr*
