Hi Gray, I can't speak to the compatability of the old planars with new CPUs, but I can tell you that running the quad core CPUs in the non-split plane motherboard usually hurts performance.
The tests we did in 2007 showed that memory bandwidth suffered by about 10%. Cache and memory latency also suffered. The extent that it will affect you depends on the memory-boundedness of your applications. CPU intensive applications like HPL should not show a performance difference. Other applications we tested (NPB, LS-DYNA) showed ~7% performance lift with split power plane. Plus, the split power plane exposes power management features such as frequency scaling, etc. Hope this helps. Thanks, jacob > -----Original Message----- > From: [email protected] [mailto:linux- > [email protected]] On Behalf Of Barnaby Gray > Sent: Thursday, August 27, 2009 3:15 PM > To: linux-poweredge-Lists > Subject: Quad-core Opteron and SC1435 unified plane > > Not strictly a Linux question, but hoping someone here might have > experience. > > We purchased SC1435s originally almost 2 years ago with single Dual > core > Opteron 2216s. We'd like to upgrade these to a Quad core Opteron 2376. > > Dell support seem a bit clueless on compatibility and put on a new m/b > on the quote with split power plane. From what I can see from reading > up > a bios update to the original mbs is all that should be required, > accepting there will be some power/performance compromise on the > northbridge clockspeed due to it not being split plane. > > Can anyone say decisively if this is right and will work? (are Dell > just > trying to scam us for more mullah?) > > cheers, > > Barnaby > > _______________________________________________ > Linux-PowerEdge mailing list > [email protected] > https://lists.us.dell.com/mailman/listinfo/linux-poweredge > Please read the FAQ at http://lists.us.dell.com/faq _______________________________________________ Linux-PowerEdge mailing list [email protected] https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
