Question AsRock Rack Toasty FSC

[panpsychic]

I have an AsRock Rack B650D4U, and noticed in the IPMI web interface that when I load the CPU, the "FSC_INDEX" sensor value almost immediately skyrockets from <50C to >90C. Is this indicative of a problem? I'm not sure where this hardware is physically located on the board, but the whole thing is getting good air flow. Thanks.

 

[Ralston18]

Update your post to include full system hardware specs and OS information.

Include PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)?

Disk drive(s): make, model, capacity, how full?

Take a couple of photographs showing the full inside of the case.

Post the photographs here via imgur (www.imgur.com).

 

[35below0]

What CPU is it? It's not uncommon for newer CPUs to suddenly soar in temperature then rapidly cool off.

 

[panpsychic]

• Arch main OS, Win 11 aux.
• 2TB WD SN850X and 1TB SN850, respectively.
• 7950X3D
• 2x Micron MTC20C2085S1EC48BA1
• Corsair SF1000L, brand new. Have used an SF750 in this system, too.
• Radeon Pro W7800
• Sonnet USB3-4PM-E and Mellanox MCX311A-XCAT

The Front Side Controller is not part of the CPU. I believe it's either part of the B650 chipset or possibly the controller labeled "Super I/O" on page 9 of the board layout diagram: https://download.asrock.com/Manual/B650D4U.pdf. The "Super I/O" chip is not heatsinked.

I just switched this system from a 240 AIO to air. When testing CPU temps in the past, I am fairly certain the FSC was not getting nearly as hot. It jumps up from ~50 to 90+ almost immediately when putting a load on the CPU. Trying to figure out if this is normal or if it's a ticking time bomb. May need to contact AsRock Rack support.

 

[punkncat]

@panpsychic what case is that?

I am personally rather amazed that much power is under the hood of such a small appearing case and not just bursting straight to flame on air.

 

[panpsychic]

Sliger Cerberus.

And yes, it's called masochism.

 

[35below0]

It jumps up from ~50 to 90+ almost immediately when putting a load on the CPU. Trying to figure out if this is normal or if it's a ticking time bomb.

You can use ThrottleStop to monitor CPU throttling and see if it's throttling heavily under load.

 

[MikeAmb]

Just sharing for anyone who may come across this searching FSC_INDEX, it's apparently a fan speed sensor that reports in degrees instead of a percentage. Water cooler fan speed for example so 90*C is 90% speed.

 

[35below0]

Just sharing for anyone who may come across this searching FSC_INDEX, it's apparently a fan speed sensor that reports in degrees instead of a percentage. Water cooler fan speed for example so 90*C is 90% speed.

Source?