Help build a pc to run most games on ultra no lag...$1700

AMD FX 9590, Asrock X99 extreme MOBO, corsair Hydra series cooler, golld rated 800watt PSU, 16GB 1888 RAM Ripsaw, RAIDMAX high airflow gaming case, any optic drive, WD 1TB hhd/ssd hybrid drive (w/ optional Samsung SSD), GTX 970 (or 980), and Linux Ubuntu (optinal windows 7/8 dual boot) [Windows 8 is better optimized for gaming, despite its horrible layout]

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($219.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.75 @ OutletPC)
Motherboard: Gigabyte GA-Z97X-SLI ATX LGA1150 Motherboard ($116.88 @ OutletPC)
Memory: Team Xtreem LV 16GB (2 x 8GB) DDR3-2400 Memory ($127.99 @ Newegg)
Storage: Crucial M500 240GB 2.5" Solid State Drive ($79.99 @ Newegg)
Storage: Toshiba 2TB 3.5" 7200RPM Internal Hard Drive ($74.99 @ Micro Center)
Video Card: EVGA GeForce GTX 970 4GB ACX 2.0 Video Card (2-Way SLI) ($329.99 @ SuperBiiz)
Video Card: EVGA GeForce GTX 970 4GB ACX 2.0 Video Card (2-Way SLI) ($329.99 @ SuperBiiz)
Case: Corsair 300R ATX Mid Tower Case ($64.99 @ Micro Center)
Power Supply: SeaSonic 750W 80+ Gold Certified Fully-Modular ATX Power Supply ($129.99 @ Newegg)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($13.99 @ Newegg)
Total: $1517.54
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-02 22:41 EST-0500

I don't know much about cases, so feel free to pick something that you would like more.
Includes a 256GB SSD, 2TB HDD as well.
Leaves some extra pocket change too, or room for improvement if others see fit.

I have 2x GTX 970's in my system, and the only problem I've had is that Shadow of Mordor did not have proper SLI support for a while after its release.

Other than that it runs like a dream, for not really much more than a single GTX 980 too.

I would like this build though SLI and games are not always the best due to however you set it up there is more of a chance that only 1 card will actually be working while the other 1 idles and/or inframe studder and/or tearing and/or other issues with SLI. Thus i tend to stay away from SLI setup and my own take on it is
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor ($219.99 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($28.75 @ OutletPC)
Motherboard: Gigabyte GA-Z97X-SLI ATX LGA1150 Motherboard ($116.88 @ OutletPC)
Memory: G.Skill Sniper Series 16GB (2 x 8GB) DDR3-1866 Memory ($127.50 @ Newegg)
Storage: Samsung 850 Pro Series 128GB 2.5" Solid State Drive ($103.99 @ Amazon)
Storage: Western Digital BLACK SERIES 2TB 3.5" 7200RPM Internal Hard Drive ($123.88 @ OutletPC)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card ($546.98 @ Newegg)
Case: Corsair 300R ATX Mid Tower Case ($64.99 @ Micro Center)
Power Supply: Corsair 760W 80+ Platinum Certified Fully-Modular ATX Power Supply ($163.99 @ Newegg)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($13.99 @ Newegg)
Total: $1510.94
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-02 23:45 EST-0500

it is mostly the same build but with a few tweaks in it in that also $6.60 cheaper for what i beleive is a better build. a Corsiar power supply of the "High-end Professtional grade" series and 80+ platinum instead of 80+ gold so a little saveings on your energy bill but really not alot but in that the GTX 980 instead of 2x GTX 970s will save you alot as you will only be running 1 card not 2 to that you will also have none of the headaches which go along with running SLI, the storage was changed and might or might not be a minor upgrade or downgrade depending on what you do but i beleive these hard drives are better and then the rest of the system is the same.

"more of a chance that only 1 card will actually be working while the other 1 idles and/or inframe studder and/or tearing and/or other issues with SLI."

Sorry but that is flat out misinformation you are providing.

About the only recent game that does not support SLI is Wolfenstein: New Order, and SLI/Crossfire has come a LONG way since 6 years ago where stuttering was an issue. I would say it is not at all an issue any more, speaking from experience having a pair running myself.

GTX 980 instead of 2x GTX 970s will save you alot as you will only be running 1 card not 2 to that you will also have none of the headaches which go along with running SLI,

The GTX 980 maintains the same power efficiency as the GTX 970. But having two GTX 970's enables more performance, with higher power consumption under full load.

It's pretty straightforward for higher performance to require more power usage. 2x GTX 970's performs approximately 50% faster than a single GTX 980. (Based on games such as Battlefield 4, Crysis 3 ect)

well that is true for triple A titles many B titles and below that kind of budget do not have the resources to make a profile for SLI / Crossfire thus haveing a single card will help in them.
The power saveings is also an issue in yours as you are useing 200W more for only a 50% increase at most? does not sound worth it when you figure in that both GTX 970s will be running all the time even when not in games that will put it under load ... and yes i know about the energy saveing modes in graphics cards but still it will be less money for about the same preformance um unless the OP only has a 60hz monitor then 1.5x the money for the grpahics cards for the same preformance as 2x GTX 970s is only worth it if you have a monitor above 60hz but if you have a monitor which is 60hz then you will see no differnce.
Again onto the SLI thing depending on the kind of load and what game and if the game studio cared to patch it tearing in SLI still does happen just most morden triple A titles it doesnt. In that you cannot assume that the OP will only be playing triple A titles.
It is nice that you can afford SLI but many cannot and with the set up SLI does not make that much sense to do when it costs more um $6 or so more but still doing SLI on the orginal build is not smart when it is locking you in to a certain card to which 3x and 4x SLI do not scale well when compared to single card and 2x SLI making a single card for now and then if needed another card for SLI in the future. I have read and been told that SLI is not as good as a better card that does the same thing to which 50% better? i will like to see a source for that claim.
I also see you took no issue to the PSU thank you as i think the PSU is a better quailty one and will make a good replacement to the one you added.
You also have to think about power and how much dual GTX 970s will draw compared to a single GTX 980. Yes 2x GTX 970s will do aroudn 10% to 50% better than a single GTX 980 depending on the game, support for SLI, and how well it is optimized to work with mulitple GPUs. This is because the power draw at full load will be higher about 1.8x higher than a single GTX 980 with the preformance only 50% higher at most depending on which part of which game as some games you will not see any diffenrece while others you will see a huge differnece for example minecraft you will see no differce, shadow of mordor SLI has to be added through the driver but is not natively supported even though scaleing in it from 1 to 2 cards is almost 100%, then you have games which do support it natively like battlefield 4 where the scaleing isnt that much but is still around 30% to 50% depending on what is going on on screen and how you set it up same with Crysis 3. SLI doesnt always get you an improvement so the Cheaper way of a single 980 allowing more room for upgradeablity and if needed along the line another 980 which will be giving you more preformance than 4x 970s would will be the better plan.
This is of course assuming you keep your rig when new chipsets come out and not just replace it with the newest thing on the market. If you replace it when something new comes out then yes your way is better but if you go the way of keeping it for 5~10 years with upgrades then my way is better as it allows more room to upgrade in for SLI / Crossfire one or the other or both ( i do not suggest both ) also upgradeing a rig is much cheaper than getting a new one every 3 to 5 years um really technology has a cycle of about every 2 years for the new CPU and GPU set to come out but it is said for the cycle to be 3 to 5 years long.

BOTTOM LINE if you want to just replace the rig when the preformance of it is no longer up to the task go with Azathoth's part list but if you are into the plan of upgradeing instead of replaceing the rig when it is no longer up to the task go with my part list.

the 980 is a very good card and the RAM change which i made is just mainly becuase i did not like that brand though you can go with any brand you trust of course while with the SSD i see the Samsung 850 Pro series as the top of consumer grade SATA based SSDs there are faster but then you are looking at Mircon direct SSDs which are only sold in bulk not a single drive at a time or you could get one second hand but i discorage that with SSDs as you never know why the orginal person did not want it
of course the i5 is the top of the line of i5s and overclockable somewhat more than the one right above it in the i5 line now making it cheaper and able to go faster if wanted to overclock of course while the mobo is ok no overkill while not underkill either just a little on the more expenive side for a non-gamer mobo is all.
etc. etc. with the nit picking but you get the point there is a ton of room for nit picking on a personal basis base but with the case as long as everything fits, it has enough room for your planned upgrades and it looks nice to you it is a good case even if we do not think so just dont get a plastic one.

PCPartPicker part list: http://pcpartpicker.com/p/yz7VZL
Price breakdown by merchant: http://pcpartpicker.com/p/yz7VZL/by_merchant/

CPU: Intel Core i5-4690K 3.5GHz Quad-Core OEM/Tray Processor ($218.49 @ SuperBiiz)
CPU Cooler: Cooler Master Hyper D92 54.8 CFM Rifle Bearing CPU Cooler ($38.99 @ Mwave)
Motherboard: ASRock Fatal1ty Z97X Killer ATX LGA1150 Motherboard ($129.98 @ Newegg)
Memory: G.Skill Ripjaws Z Series 8GB (4 x 2GB) DDR3-2133 Memory ($93.98 @ Newegg)
Storage: Western Digital Red 1TB 2.5" 5400RPM Internal Hard Drive ($69.99 @ Amazon)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card (2-Way SLI) ($546.98 @ Newegg)
Video Card: Asus GeForce GTX 980 4GB STRIX Video Card (2-Way SLI) ($546.98 @ Newegg)
Case: Aerocool Strike-X One ATX Mid Tower Case ($47.99 @ SuperBiiz)
Power Supply: Antec Neo Eco 620W 80+ Bronze Certified ATX Power Supply ($49.99 @ Newegg)
Total: $1743.37
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-03 23:16 EST-0500

I went $43 over budget (sorry ), but this build will last for a long time. Sorry for no SSD, I gave you 1 TB HDD doe..
Hope it help!

i will suggest a Hitachi or WD drive over a Seagate drive due to higher failure rates on seagate
Source http://www.techspot.com/news/55399-backblaze-data-shows-hitachi-and-seagate-as-most-and-least-reliable-hard-drives-respectively.html
That is the most common report about it which comes to mind also the most common study sourced for why Seagate is 3rd best brand instead of the best one which is Hitachi according to the same study. The sample size was only a few throsand drives yes but it was a decent sample size and there is a spike in failure rates amoung seagate drives compared to the others in the same amount of time.

Other than that one part your build is perfect for that budget just needs a more realiable HDD is all as i am assumine you will be using it for at least another 5+ years.

How about the build I suggested?

very good though again i think 1 GTX 980 will do better than 2x GTX 970s ... if you are planning on upgradeing it in the future then 1 GTX 980 will be much better to go into SLI for 2x GTX 980s instead of a 3x or 4x 970s upgrade also. All the rest of it is fairly good.

it is about the same as every other board that is Z97 based. With the main diffenrce being its Ultra M.2 port that i use for a boot drive though have to go through the UEFI to set that up as it isnt automaticly set as the first drive but around the 2nd or 3nd drive to check for a /boot parition.
For windows you shouldnt have to many issues as i got it to work after a few hours of trail and error. So yes trouble shooting is a real possiablity with it if going with a M.2 drive if going with a SATA drive for the OS then it will be buttery smooth with the setup and installation of drives and OS install.
it can take the other high end hardware and run it all at native voltages fine it is when you start to overvolt that i do not know how it will preform as i have not done so with mine becuase i kinda use it for a server not for a main PC.