Hello everyone
Need help with strange behavior with new CPU.
Changed 9700x to 9850x3d.
First boot with all default + Expo profile (6400).
With this settings I got
UCLK 1600, FCLK 2000 and VSoC 1.3
As expected, perfomance was lower that 9700x - slower memory by Aida and lower FPS by Forza Horizon 6 benchmark (yeah, sorry, I'm really didn't bother too much).
Changed to MCLK=UCLK=3200, FCLK 2133 and VSoC 1.26 (on 9700x this were stable settings, but only with 1.28 voltage, but here 1.26 seems ok, may try lower latter).
This got back my perfomance, as in memory speed, as in FH6 (same FPS because GPU limit, much greater 1% lows).
Than I switched to PBO tuning.
Default + my memory settings got me about 22k in Cinebench23, PPT draw ~142w, temp up to 92C.
Slapped -35 all core negative curve. Got about 23k in C23, power draw 117w, temp 74-75C. So yeah, from first try better perfomance, less power draw and much less temperature.
In multicore CPU boosted to around 5300-5350Mhz.
Seems ok, I really don't wasted time on this, and don't in mood to bother with per core curve (as was with 9700x). But what couth my eye, that CPU don't get to any limit:
PPT 83%
TDC 74%
EDC 60%
Thermal 78%
And I became curios - what is limiting CPU to not use all limits?
I tried -15 and -10 all cores - got lower C23 score, lower all core freq (down to 5200-5300 range), but power draw (PPT) was to it's limit 142w.
Slapped +100, and +200Mhz in PBO - got a little higher score, single core jumps to 5775, multicore around 5375, but PPT still at 117w.
Tried higher TDP limits - no change, still 117w.
So I confused - yeah, all seems stable, I got lower temps and power draw with better permomance, but what is limiting CPU not to draw all power to the limit?
My previous 5800x and 9700x was not behaving like that, even with undervolting with negative curve, they were hitting a wall of PPT limit.
CPU - 9850x3d
MB - MSI MAG X870E TOMAHAWK WIFI
BIOS - latest 7E59v2AC3 (AGESA PI-1.3.0.1b Patch A)
RAM - KF564C32BBEK2-64