FIRING UP the Devil 13 Dual Core R9 390 DX 12 AXR9 390 II 16GBD5

In all my experiments, I never got realy good results out of quad fire (fc 2 x 3870x2, 2 x 4870x2, 2 x 5970 and 2 x 6990. For example the 6990 plus 6970 , in most games gave outrageous results as well as fantastic graphics. (I am ATI Lobotomized, I had those implants put in, remember these :

,

Mind you I have not tried 2 7990 or any further... I keep reading about the scaling problem seemingly generated by 4 gpu. I have never had deadly probs with trifire. Quad fire, yes, as you mentioned, cooling becomes a priority. I always keep proper ventilation, mostly through air conditioning, even feeding it directly into the rigs.
Why did you drop quad ? (if I may)

(just as a note, i'm running boinc 24/7 utilizing 100% of my gpu's at all times)
with 4x 290x's i have no issues with quad-fire scaling except the one with temps on air... and then again its fcking loud to keep it stable 24/7 at normal temps... to keep it 65-70'C i had 4x 6500rpm fans pumping cold air onto them.

having ac feeding cold air into it would fix most of the issues... but its expensive to keep ac's on 24/7 at home and its loud the %? same? as my fans - and venting hot air outside.

main cause - I've moved into studio to cut down on my expenses, noise became major issue. Thus i'm happy with furyx - fp64 is bad on it but fp32 is awesome like 2x 290x's

quadfire scaling on 290x' was ok but then again i was running it on i7 3770k 4.6GHz(on 4.2GHz there were issues feeding work to 4th gpu) and i74820k (LGA2011) no issues at all at 4.2GHz and 5GHz.

// I was disappointed by 6970-6990 series... my old 5970 was out preforming 6990

It seems that the 6XXX series was very brand oriented.......bad models and good models. Some users burned the crap out of these ; while others just popped almost by just looking at them; for me at the time, Diamond was nearly problem free. 6990 & 6970 are a nice combination..also good for heating (lol).
I am installing some brand new i7 3960X, for a darn good price; and it also seemed to solve a lot of my RIVE problems. (and I have 4, realy, plus they OC, quite easely.
This combination has made me happy , and I had not been for a while....X99 (IMO) is a p.... of s,,,,,(IMO)

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nice setup.
yea but i brought reference models from diamond (and did water loop on them) - i love diamond but i don't see them around anymore.

there are few things for temps that i did in my 4x290x build,
1) PCI-E extender boards (20-30cm) this allowed me to mount gpu's on top of each other and use plastic air vents - underneath - i've brought air vents from ebay car parts (fitted them in a way that allowed me to push cold air inside between cards)
so the setup looked like this but with 4 cards

this was already partially stripped build in studio.

2) case, i came into love with cooler-master haf-xb, it allows for great air management and quick air pass-through build
keeping psu / drives etc completely separated from mobo and gpu's.

my current setup is running quite cool (40'C on most of the components on full load)

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I have always wondered what the extenders were doing to the signal ??? I kind of tried to avoid them, What is your take on it ?

no issues at all. Even 1m wouldn't cause issues. A lot of miners use them to separate up gpu's or mount more gpu's on single pci-e port.

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here are some splitter/raiser cards expansions and links worth taking a look.
Know this though, you may choke your mobo/cpu/chipset if you pack to much into it. (though pci-e x16 3.0 should take at least 4 gpu's easily, easically if you don't use any other pci-e slots you may even put 8 gpu's on 1 pci-e port)

make sure they have plx chip if you try to enter multiple cards into pci-e x16 port. Most of this is for crunching data, so there isn't much gpu-cpu-mobo transfer in between them. GPU gets works and it works on its own most of time. Games might not really benefit from more than 4 gpu's.


http://www.cyclone.com/products/expansion_backplanes/pcie2-437.php


http://www.cyclone.com/products/expansion_backplanes/


http://www.cyclone.com/products/expansion_systems/index.php


http://www.netstor.com.tw/_03/03_02.php?MTEx


http://www.compsource.com/pn/RSCR2UGA2E16A/Supermicro_428/RscR2ugA2e16A-1u-Pas--Pcie-To-Pcie16-RSCR2UGA2E16A/
http://www.supermicro.com/resourceapps/riser.aspx

here's a nice tutorial to pci-e

http://xillybus.com/tutorials/pci-express-tlp-pcie-primer-tutorial-guide-1
http://xillybus.com/tutorials/pci-express-tlp-pcie-primer-tutorial-guide-2

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Absolutely extraordinary ! I never inquired in that area ! This opens up a very interesting path. In my case it is graphical, not mining. One rig has 3960X/PowerColor Radeon HD 7990 DirectX 11 AX7990 6GBD5-2DHJ 6GB /PowerColor AX7970 3GBD5 2DHPPV (working 3 X x16)
another, most recent 3960X, RIVE, devil 13 390 in trifire with XFX R9 390X; this last one is outstanding; ok it does not do well in all games, but the ones that kick , kick way up !!!! that is the way it is !!!!!(IMO) (all working on X3 16)

OK so, r9 390 II 16 devil and XFX 390X in trifire, on a new windows 10 install !!!!
Any others trying this out ?
any suggestions and ideas are welcome. The setups are on A409U ver 1.0

specific profiles to increase refresh rate are not working, and do not even test ????

I have 2 390Xs, and 4k is not playable, 1440p is a dream though, easily max out just about anygame.

try:
fallout 4, amd been working on cf profile there. (?you may reach 4k at ~40FPS?)
witcher 3 -- check if gamework effects are still buggy as fck
saper -- check fps on that - its always a good benchmark

Hey ! roughly the same, 4k is like 30 to 55 fps and sometime choppy ! 1440 is definitely the sweet spot, it does run like a dream, however I seem to be running on only 1 GPU. If I go 1080 I get crazy fps, 125 to 200 and over !
I am not enjoying 10, the scaling is confusing and you have to make a correction on the exe to leave you the resolution control !

Got none of the ones you state !! Doom4 ??
have any people been trying different combinations to end up with a working profile (scaling)
are you on win 7 or 10, I do have both.
win7 is 7990 plus 7970 and win10 is devil13 r9 390ii 16 and XFX 390X

not sure if doom supports any multi-gpu setups at the moment.

Ashes of Singularity will give you most performance.

sigh...

usually these threads turn into pc cabling picture porn :D

I hate to see the temperatures of a 390X2, My single 390 can reach 85 C.

I hope not, multi GPU setups are quite interesting and , when going, give very interesting performance boost.
Just the right formula is needed, and it is somewhere out there !

I do have to keep the cover off, but mainly for mobo cooling, hdd controller reaches 60-65 otherwise!