Hello, I installed FreeBSD 5.2-BETA using following configuration: o Opteron 242 (1.6G) x 2 o Tyan Thunder K8W S2885 o 512M x 4 ECC registered PC2700 (attached symmetrically) I encountered systematic reboot with some naughty DRAM modules, and replacing them makes me happy. Thanks for your hard works! --maho