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Compatibility issue with Tyan boards & Antec PSU's

Some news for people looking to build a dual-Opteron server using a Tyan motherboard: certain models of Tyan motherboards are not compatible with Antec TruePower II EPS PSU's. A voltage fluctuation on the 12v+ rail is causing major problems for the board.

For those who are currently in the market for dual Opteron boards and are preferring products manufactured by Tyan, be sure to carefully pick power supplies with some research before purchase. We have been advised that certain Antec power supplies are having issues with the following motherboards from Tyan:

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

All the above boards are based on AMD's 8000 series chipsets except the Thunder K8WE (S2895) which uses NVIDIA's nForce Professional 2200 and 2050 south bridges. 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.

AnandTech

Posted by | Tue, Nov 22, 2005 - 11:20 AM