Calm down. I opened up the case and the 100c card is getting 80c, and the 80c card is getting 70's-60's. It's just my case. One card runs great. But my second card is close to the bottom with minimal air flow.
Sounds good. Like I said if temp drops it is air restriction. You need a large volume of cool air to keep those GPUs cool. If you need to use a case look for one which has plenty of room below the bottom card. Also look for one which has the HDD mounted high (up near the CPU) that gives you a straight shot from the front mounted fans to the cards air intake.
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I've got my mining pretty much stable. I'm tweaking the voltages lower to see what is stable to get cooler temps maxed out.
Lowering memclock as far as possible (depends on the card, bios, company) will reduce some heat and give you some headroom.Quote
This rig isn't going to be mining 24/7. It'll be mining overnight or when I'm in class. So it'll be running less than 24 hours per day at those temps and fan speeds. I have a 3 year warranty. Will that cover me if my fans malfunction? I would guess so. I'm not worried about cooking my GPU because anything above 90c is completely unacceptable to me. I try for 70'sc.
Well 16 hours a day is pretty much same as 24 hours a day. Mining is hard on hardware. Yeah a dead fan will be covered under warranty but it will be a pain in the ass and a long 2+ week delay getting your refurb card (which was used by someone else who likely abused it
). With good airflow you should be able to keep fans speed down to 75% or less. That will improve longevity of the fan. If your motherboard allows separating the cards more (because it has 3+ 16x slots) that helps too. You can find extra long crossfire cables if you need one for gaming.
-My memory clock is as low as possible.
-As for the RMA wait period, I'll always have one 6970 running to keep my games going. Lol
Thank you guys for your advice. I'll keep working on this stuff and update with what I finally get it stabilized at.
My gaming rig is complete. 
