X570 Steel Legend, SB gets to 85-87C under load

Worried about my new upgrades. Running a 3700X, 16 GB 3600 MHZ CL18, GTX 980 Ti and the X570 Steel Legend. I've put the GPU in top slot as the computer won't post with it in the second(which is also only 4x). I have removed the shroud from the GPU so there are a few mm between the GPU and the chipset fan. It's in a well ventilated Corsair 600T with ample airflow and proper cable management.

My issue is in an about 24-25C room, writing this very post, the SB temp is hitting about 72C. Earlier today I did various stress tests(OCCT CPU and GPU) and got it up to around 85C. Playing Division 2, HWINFO reported it maxing at 86.8C.

This cannot be intentional? I saw a youtube video stating ASROCK says the thermal limit is 105C, can anyone confirm that?
Furthermore, the chipset headsink is hot to the touch. I worry that my M2 drive(Intel SSD 600p 1TB) will take damage as operating temperatures state 0-70C. I thinking to pull it out and use my PCIE extension card, though that seems pretty silly when you have M2 slot readily available.

Can I expect this to improve with future updates to BIOS/Chipset? Any tips on how to improve this? Should I just accept it as normal?

It's also running performance. Just turning the computer on, the SB is about 60C, with the fan running at 2500rpm. When I'm hitting around 85, I think it was around 4500-4600rpm.

I think the motherboard is rated for up to 125C

I'm Running a 3700X, 16GB 3200MHz (OC to 3600MHz CL16), RTX 2070 in a Phanteks P400S case.
My X570 Steel Legend's SB maxes at 77C. But I don't use any M.2 drive, though. Just regular SATA SSD.

I'm using the Ryzen Balanced Power Plan. It reached 77C when playing Anthem.
On light web browsing or watching 4K Youtube it's usually at around 65C and at low 60s when idle. I use a custom fan profile on the SB_FAN settings.

I forgot where i read about the 125C temp, maybe it's on r/AMD reddit.

So it turns out it definitely is the GPU heating it up.

My graphics card: https://imgur.com/JwLD15P

It has a copper plate connected to the VRMs that gets pretty damn hot. I don't know if it straight up touches the heatsink, but it is max 1-2mm from it if not. It lines perfectly up with the fan, so that the fan takes in hot air all the time. Moving the graphics card to the 2nd slot helps quite a bit with the temps. 20 minute burn in test(OCCT) resulted in about 84C, which is okay I guess. On the second PCIE slot, the copper plate does sit straight on top of the thermal pad, that goes down to where the chip is.

Writing this post, it goes down to about 70C again after having been at 84C, which matches how hot the heat sink is to touch.

My problem is of course, the 2nd PCIE slot is only 4 lanes, so it does affect my performance quiet a bit. Division 2 bench on ultra @ 1080p, it goes down from 63-64 to 52. If asrock would just reply to my support request so I could know exactly where the limit is, I would feel better about moving it back to the top slot. Was thinking to get a new graphics card within 6-12 months, will need to check out where all the piping is.

Goddamn brilliant design on this motherboard...

Also, I did take apart the chipset heatsink and saw it was correctly mounted. It uses a small thermal pad to transfer the heat to the heatsink with the fan on it, which in turn have a thermal pad up to the upper part. Seems to work okay. The reported temperature definitely matches how hot the heatsink is.