Tyan motherboards and Antec PSU's are Incompatible

mmonnin

These four Dual Opteron boards from Tyan are having problems:

Thunder K8S Pro (S2882)
Thunder K8SD Pro (S2882-D)
Thunder K8W (S2885)
Thunder K8WE (S2895)

The 12V Rail often drops to 11.3V or even lower and the problem seems to be fixed with a non-Antec Power Supply.

The issues that are affecting the above motherboards have to do with a power fluctuation on the 12V rail that seems to be occurring only with Antec True Power 2 EPS power supplies. The units do not appear to be delivering consistent power -- often dropping to as low as 11.3V on the 12V rail. While some power supply units pass quality control tests initially, they end up failing after extended use. Using non-Antec power supplies solves the issue and for now we can only recommend that you use this work around until an official statement from Antec can be given. Tyan motherboards however, have always enjoyed a strong reputation for rock-solid stability -- although you may be required to be picky about which components you attach to the board.

I have always recommended Antec. I don't know why only four motherboards can have a problem like this.

Source: Anandtech

GrayFox

My buddy has a antec 550W eps Thunder K8W voltages are rock solid with 3 hdds.

11.98 low 12.08 peak.

edit: Nvm that problem only effects the series 2 .

deicist

Uncompatible?

That's inbelievable!!