Elfear, what size rads are you using for the 290s, considering watercooling again but my space is limited. The krackan G10 kit seems pretty good and that's only a single rad but everyone seems to recommend a crazy amount/size of rads for water cooling...
Well, Im sorry, but the products produced by AMD are suspect at best. What is the title to this thread? I prefer and promote absolute stability and reliability, not "fps" especially when all the cards in question don't have issues with FPS ability to begin with. But AMD cards run hot, their reference coolers are terrible, not exactly what you want if your looking for your setup to last "a long time" as the OP wants..........ok its pretty apparent this mclovin42 guy is here only to bash amd...every amd thread got shat on by him.
Elfear, what size rads are you using for the 290s, considering watercooling again but my space is limited. The krackan G10 kit seems pretty good and that's only a single rad but everyone seems to recommend a crazy amount/size of rads for water cooling...
It's better because 400w+ is dumped outside your case with 780 Reference, whereas with 780 Lightning OC 700w is dumped inside your case and recycled through your cooling solution.
Outside of very well done case airflow 780 Reference is by far the best cooling option available, followed by reference 290. Yeah, I'd rather have two reference 290s than two aftermarket 290s. I had two TF3 7950s in an open bench and without putting a 120 on top to push down and out air from between it was a completely impractical setup.
This is exactly what Reference cards were designed for.
A couple of things. 1) If you can run 1200 then you don't really have too much of a heat problem. 2) If taking the side off of the case helps, your case has a problem.
That would be true if it was a fact but im sure its not.
The heat coming off the back of the PCB is equally as hot as the air coming off the fins. I had 2 reference coolers before and the top card was still way hotter.
I have my cards totally open so the air can leave the case and the bottom card is 65c at FULL load! and the top card is 85-94c at the same time. So the Air in the case is not the problem its the air being heated by the back of the PCB on the card below. You only have to feel how hot it is to see whats happening.
Im going to get a new case and use the other PCI 2.0 slot to give me space. Or i might upgrade to Haswell Hex core and a new bigger motherboard.
That would be true if it was a fact but im sure its not.
The heat coming off the back of the PCB is equally as hot as the air coming off the fins. I had 2 reference coolers before and the top card was still way hotter.
I have my cards totally open so the air can leave the case and the bottom card is 65c at FULL load! and the top card is 85-94c at the same time. So the Air in the case is not the problem its the air being heated by the back of the PCB on the card below. You only have to feel how hot it is to see whats happening.
Im going to get a new case and use the other PCI 2.0 slot to give me space. Or i might upgrade to Haswell Hex core and a new bigger motherboard.
Elfear, have you had any of the black screen issues people have been talking about on overclock.net? Personally i think its related to software reading the gpu sensor data like cpuz or afterburner etc. I am a bit concerned about the issue so it would be goof to hear your experiences! Thanks everyone so far for your input!
I haven't had any issues with black screens like some other users have. I flashed both cards with an Asus bios though to unlock the voltage and I've heard that fixes the issue.
Pretty easy way to see this is to remove the mobo from your case, take a piece of cardboard about an inch thick and wedge it between the two cards to create a V between the two. Then place a 120mm fan on top of the cards towards the back blowing down at the motherboard.
You should see a 10-15C drop in temps at the same fan speed, the reason your current method of removing the side panel and using a box fan isn't working is because it isn't actually addressing the fundamental problem with non reference designs in MGPU.
A Corsair AX850 Gold will max out at approx 950 Watts with 81% efficiencey before it trips. I have the same KM3 design with the XFX 850W Pro and would be confident to run either the 290 or 290X in CF at 1200Mhz for Gaming but wonder about Mining.The vision tech card looks good but only has a 2 year warranty, also at those clock speeds I think two of them would definitely overload my Corsair AX850 Gold, elfear, what psu fo you have and have you ever taken a measurement at the wall?
Pretty easy way to see this is to remove the mobo from your case, take a piece of cardboard about an inch thick and wedge it between the two cards to create a V between the two. Then place a 120mm fan on top of the cards towards the back blowing down at the motherboard.
The vision tech card looks good but only has a 2 year warranty, also at those clock speeds I think two of them would definitely overload my Corsair AX850 Gold, elfear, what psu fo you have and have you ever taken a measurement at the wall?
Oh Balla you're such a Puss. I use Tie-Downs and hang the end of the Cards from top of the casing to keep them from sagging. Even a fishing leader works providing you don't short out and ensure the case has air flow.It was the only way I could keep my TF3 on top from going super inferno mode...