So I spaced out my cards a little more. Maybe a cm or so and it has dramatically helped with gpu heat. 65c at 80% fan speed at 75w per card. I have had it up to 80w and the temperature stays the same so that sounds good doesn't it?
I have some worries about wattage though. I understand that a 8 pin pcie can carry 150w? I have 4 cards running off one evga 750w gold. I have it wired with 4 cards powered with the 2 split pcie cables you get in the box and the risers powered from from the single pcie cables you get in the box but I've added 6 pin to 6 pin dual splitter to give me enough connections. Does that make sense?
I worry that if my 8 pin cables from the psu can only carry 150w and say I'm taking 80-85w per card and my risers were taking 80-85w I would be overloading my cables.
PCIE cables/connectors can carry more than 150w.
From Toms Hardware :
Even though the specification allows for a delivery capability of 75 W (six-pin connector) or 150 W (eight-pin connector), the total power-handling capacity of these connectors is at least 192 and 288 W, respectively, using standard terminals, and even more using the HCS or Plus HCS terminals.
https://www.tomshardware.co.uk/power-supply-specifications-atx-reference,review-32338-12.htmlI run each card and riser on one lead using good quality pcie 8 pin to 2 x 8 pin splitters. No problems at all.
Besides which, if your cards are using 85w, then that is their total draw. The riser power is included in the power usage for a card, not additional.
So do you think I will be ok running at 85w? I bought 20 awg 8 pin pice to dual y 6 pin off amazon and I'm using those to power the 4 risers. I've bought a multimeter to test the riser wattage anyway so should be here tomorrow. Was just a bit afraid to go over 150w between the card power and teh riser power