How long will my pc run games on max?

Batguerra

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Here are the specs:

2 HD 7970's Ghz Edition Toxic Edition 6gb Lethal Boost On
FX 8350 OC'd to 4.6ghz
WaterCooler H100i
Source 1200W Silent Pro Gold
Gigabyte 990FXA-UD5
2 HDD 3terabit
SSD Corsair 120gb GTX Neutron
Corsair Vengeance 16g DDR3 1800mhz

So what do you think?

PS: I may soon put a third gpu, a R9290X
 
Solution
Your PC will run games on max until such time as you run a game at settings that it that it can not run on max. Since you could easily choose settings right now that your system could not max out comfortably, why does it matter? Also, we're not clairvoyant and can't tell you with any certainty at what time you will run software at settings your system will struggle with.

If you want to rephrase your question a bit more concisely, we can give you better answers.

An R9 290X will not CrossFire with your 7970's but an R9 280X will. If you are running GHz editions of the 7970's, they will clock down to match a 280x if installed. Might be worth trying to find another GHz edition 7970 instead.
Probably until the game programs start being coded for 4K resolution. You didn't say what monitor set up you have, but I would think that even on a 30" monitor you will still be good well into 2016, maybe beyond. A 4K monitor might change that.
Don't know for sure about AMD/Radeon cards, but I know with Nvidia multiple card set-ups all the cards need to have the same chipset ie. 2 x 760, 3 x 780 etc. Don't think you will be able to mix the R9290X with your two 7970's. Could be wrong, but I think it would be a real headache to make it work.

A third 7970 would work nicely.
 
Your PC will run games on max until such time as you run a game at settings that it that it can not run on max. Since you could easily choose settings right now that your system could not max out comfortably, why does it matter? Also, we're not clairvoyant and can't tell you with any certainty at what time you will run software at settings your system will struggle with.

If you want to rephrase your question a bit more concisely, we can give you better answers.

An R9 290X will not CrossFire with your 7970's but an R9 280X will. If you are running GHz editions of the 7970's, they will clock down to match a 280x if installed. Might be worth trying to find another GHz edition 7970 instead.
 
Solution

Batguerra

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clock down? strange, I can run bf4 on max at 100 fps.
 
When AMD cards are in a CrossFire configuration, they all run at the speed of the lowest clocked card. So, if you took a 7970 running at 1050 MHz, and CrossFire it with a 7970 running at 950 MHz, they will both run at 950 MHz. Make more sense? :)

At what point does max settings have no bearing on frame buffer size? If you increase the resolution of your output, you'll decrease your fps. So, right there you have a problem with the term max, as you can clearly run with higher fidelity settings. If you're only concerned with 1920 x 1080 / 1200, you should list that. Also, what refresh rate you expect your max detail to be running at can be helpful. :)
 

Batguerra

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sorry, as max I mean everything on ultra including 4msaa and 4k resolution
 

Batguerra

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yes, even turned fraps on to see, a pair of 2 with 6gb each and overclocked as said in the question