Originally Posted by thlnk3r
PatrickD, that's a good approach then. Heck I won't complain about a 500Mhz overclock. If you plan on having this machine on for 24/7 then that should get you by perfectly fine while keep the temps down. Did you end up settling with 1.375volts?
yep, went back to the 3.5 settings that passed a 24 hour prime95. Now I'm loading software, starting with moving 155 Gb of data from my old workhorse to the new one. I've got to get a few games going to really shake it out -- not counting a few suicide runs with furmark, the vid card has never been tested with a realworld load.
When I started OCing this build, I looked at the spreadsheet from this thread and decided to try for 3.6 as the normal system clock. What I found out is that's totally do-able, (and then some), just not in the way that I want this box configured for everyday use.
Turns out that other than adding .025V to Vcpu, upping the FSB to 226 and setting the CPU Multiplier to 15.5, all of the BIOS settings are completely stock and mostly set to Auto -- the only other hand-set settings are for memory and those are all right off the Corsair data sheet. Basically, the Phenom II X4 940 3.0 is really close to being a 3.5 stock part. No complaints here at all.
The general issue of temps is pretty interesting, because the relatively high temp of my 4870 definitely limits the overclockability of my CPU because of its effect on the base temperature inside the case. The fact that Phenom II is so cold-loving means that I am limited much more by the thermal barrier than the hardware itself.
experimental, I always solve this problem the same way -- a full tower case with several 120 mm fans front & back. Try to get case airflow to 50-70 cfm, a full tower gives you enough room to get the cabling routed out of the way. Here's a pic showing the layout inside my new box --
Haven't bought a new graphics card for quite a while and I was blown away by the 4870's 50C idle temp. Hitting 106C in furmark didn't do much for my confidence in the card's stock cooling either. But maybe I should hold off on changing out the stock heatpipes and see how it works under a full gaming load. Looks like 50C is about normal for a 4870 idle temp, if I can keep it to around 60-62C under full load maybe it'll be OK. The other parts are coming and I can change them out if it's running too hot.