I just upgraded my EVGA SuperNOVA 650 G1, 80+ GOLD 650W to a EVGA SuperNOVA 850 G+, 80 Plus Gold 850W using the Evga Individually Braided wires and with no other changes to my system 
My VRM's on motherboard went from 53c to 64c. I understand this is safe temperatures but i am confused on why the power supply is creating more heat in my VRM's. I really thought the new power supply would be more efficient. The new power supply is 200 watts more but my system load has not changed( in theory should be same power draw regardless of PSU) Hope someone can help me figure out what i am missing

No temperatures have changed except VR loop 2 constant 64c idle. Have not had a chance to test gaming yet. using synthetic benchmarks from 3dmark it holds steady. Prior to PSU upgrade it never went above 53c since installing custom loop. Windows 10 did update when i first turned it on. Will try to uninstall and recheck. I thought with going with 850 watt it would not wok as hard as the 650 watt to power my rig. More trying to figure out if temp increase is due to power increase (PSU), Resentence in the wires, new power supply not being as efficient, Dual Rail vs Single Rail? I could be just splitting hair but the temp increase just seems off to me. Going to do some gaming and see if it holds steady or increases. Unfortunately going from an old G1 series to GP wires are not compatible. waiting on new multi meter to compare resistance of evga stock wires to evga individually sleeved wires. Now that i think about it my G1 had a bad barrel connector that drove me nuts until i found it
I should no better
Don't fix it unless its broke

you could be onto something in regards to resistance change, did you replace the wires with the new ones or leave the old ones in?

tattude69
I installed a new set of evga individually sleeves wires that Evga list as compatible with my new power supply. I made sure to change all of the wires. I just wanted to make sure I was not crazy before taking things apart. I messed with it some today on the software side but all I did was make the VRM temps go up to 71c which I have never seen that high. Especially seeing I had cpu core voltage at the lowest I have ever had it 1.23 with no performance loss in benchmarks cpu never went above 68c GPU was at 37c H20 at 31c room 23c. Next step is I tested the extra set of cpu cables they have zero resistance with multi meter so I will swap them first. I did notice in the specs when comparing the 2 PSU that my old one had 150 watts on 5v/ 3.3 side and 54amps on 12v and -12v 9.6 watts new PSU has 120 watts on 5v/3.3 w 71amps on 12v and -12v 3.6watts. Wondering if these changes are having an effect. Just shows me every time I think I know something,that their is more to learn

Sounds like you’re getting deeper and deeper into the weeds to me lol. Best you can do is swap small changes at a time and see what alters it. Otherwise you’ll be chasing your tail. 

Curious what you find out the culprit is. Be sure to let us know. 

tattude69
Still clueless tested all wires no resistance difference, swapped power supplies w proper cables. using the 650 watt VR loop  is 54c using 850 watt psu VR loop is 64c best guess is computer will use more power if its available. The 650 only puts out 53 amps where the 850 can give 71 amps. No setting changes when swapping power supplies and i don't believe its airflow or the 650 would show the same temps. Clueless
At this point the ugliness of my hose routing is my first priority. Using the Evga Individually sleeved cable's helped me clean things up so well that now its time for flow meter and better Hose routing  

on the bright side, the VRM can take the heat and you likely have nothing to worry about unless the VRM start to hit that 100c or higher mark.