Okay I have some interesting results from my Mac Pro after putting my two Noctua NF-F12's in for front cooling through the case.
RAM temps have downed from around 75 to 82 C to around 56 to 64 C, which is fantastic for DDR2 ECC RAM which always runs crazy motherloving hot. My CPU's are also way down from idling around 55 to even 70 C before, to a cool 38 to 48 C. These fans are running at a mild RPM at 1500 each.
From left to right (Before temps, After temps) @ idle
Just for stuffs and giggles, I ran an Aida64 Extreme stability test to see what 100% across both CPU's would do for heat inside the machine. The results were kinda neat on how cool it kept itself without adjusting the front fan RPM from 1500.
After this though I encountered a system malfunction beyond belief, all other programs I've run in the past to benchmark and even games like GTA V on this older rig, have never caused the entire system to halt even mouse wise and hang on every click and movement. All task manager would show me is "System" and was using 30% or more CPU with 6 gbs plus of RAM used. Couldn't get a screenshot cause it became unbearable after I got Aida64 closed down.
Bonus system pictures