I don't know if your goal is a lost cause, but it will be a significant challenge. Mine is not quite 'done', but with the L5638s, 48G and the Intel 10Gbe cards they run hot enough that the fans never reach their fully low speed. I'm not running heavy workloads like F@H regularly, but when I do things that stress it the fans still light up every now and then...and even with the quieter fans it is still fairly loud when they do.
My biggest problem since adding the Intel 10gbe is that one node - just one of them - has the 5520 io chip in the rear running hot all the time. Always 60c and occasionally much hotter. I know from other systems that this chip is technically ok up to really high temps. Intel says design limit is 105c(!). But I'm not comfortable with running it hot. It sits right under the intel nic and I don't want the 10Gbe card getting cooked.
It also bothers me that it is just on one sled...can't figure out what is different...
My biggest problem since adding the Intel 10gbe is that one node - just one of them - has the 5520 io chip in the rear running hot all the time. Always 60c and occasionally much hotter. I know from other systems that this chip is technically ok up to really high temps. Intel says design limit is 105c(!). But I'm not comfortable with running it hot. It sits right under the intel nic and I don't want the 10Gbe card getting cooked.
It also bothers me that it is just on one sled...can't figure out what is different...