Supermicro MTBF Numbers for 2U Twin Systems

After some soul searching for specific MTBF numbers I have come up with the below.

Supermicro use Telcordia SR-332 update with ARPP as our MTBF calculation standard to establish the foundation for MTBF/MTTF numbers. MTBF/MTTF numbers per server do not feature.

Operating Temperature 55 degree C
Electrical stress 50%, ðS = 1.0
Temperature stress curve ðT, from Curve 5
Quality Level Level II, ðQ = 1.0
Confidence Level 90%​

I have further MTBF numbers on individual supermicro components below

Components	Q'ty	MTBF (Hours)	Environmental Temp
Motherboard	4	137,542	40°C
Power Supply	2	242,944	25°C
Backplane	1	1,653,441	30°C
Fan	4	215,306	40°C
Backplane	4	1,001,001	55°C
Riser	4	           9,359,790	55°C​

These figures are based over Twin 2 products in general

Let me know if you need further info