Would using a 2u case bring down the VRM temps of H11Dsi?

[Boneless]

Hi I'm currently running my H11Dsi with 2x 7742s and 2 Arctic freezer 4us to cool them but l'm running into issues with the VRM overheating. I was wondering if switching to a case like this ( Supermicro CSE-825 2U Server Chassis 8 x 3.5" Backplane & 3x Chassis Fans | eBay ) would be better to cool the whole board and get temps under control.

 

[i386]

"it depends"
if you now use a chassis with a air shroud and similar fans to the ones in the 825 then no.
If you use a big tower with "consumer" 120m fans running less than 1k rpm then very likely yes.

 

[RolloZ170]

would be better to cool the whole board and get temps under control.

keep in mind:
the VRM power stages (DrMOS) are soldered on the PCB. Airflow over and under the PCB will cool the PCB and the VRM power stages.

 

[mattventura]

Agreed, also FWIW I'd spend a little bit more and get an 826 instead of an 825.

 

[twin_savage]

I made a case where the majority of the the airflow went across the back side of the motherboard. It worked fairly well at cooling VRM as the motherboard standoffs were about twice the height of normal; I ended up needing a supplemental fan for the CPU2 VRM even with all this though.

 

[Boneless]

Agreed, also FWIW I'd spend a little bit more and get an 826 instead of an 825.

Thank you for your insight but may I ask what the differences between the 825 and 826 are?

 

[mtg]

I made a case where the majority of the the airflow went across the back side of the motherboard. It worked fairly well at cooling VRM as the motherboard standoffs were about twice the height of normal; I ended up needing a supplemental fan for the CPU2 VRM even with all this though.


View attachment 41504

I know it's a tangent, but I am very curious what this is for!

 

[mattventura]

Thank you for your insight but may I ask what the differences between the 825 and 826 are?

The 826 has a 12-bay backplane instead of 8-bay. It's generally easier to find newer backplanes for it for future upgrades. For example, you could get a backplane that supports NVMe drives, and connect them to the OCuLink ports on the H11DSi.

 

[twin_savage]

I know it's a tangent, but I am very curious what this is for!

I made a thread about it here:

Competent WC Case Design

It’s almost complete: The motherboard standoffs are a bit taller than they look in this picture, about triple the height of a normal motherboard standoff, they should provide enough height so that the 4 180mm fans can push all that air through the radiators. The “back” side of the case is...

forum.level1techs.com

The system is complete at this point, I should probably update that thread.