Need help choosing components for new PC

[Fundilloman]

So my brother and I are planning to build a new mild gaming PC, the budget isn´t actually fixed, so spending an extra 300$ won´t kill us.
So far I've put my mind on to a Sapphire Radeon R9 280X Dual graphics card, the reviews are great and the price is really affordable. We agreed on a Intel core i7 4790k as the processor for our new machine but doing some research I read that maybe an i5 will do the trick along with the graphics card.
Also, the graphics card says it needs 750W for single card and 1000W for crossfire (which I don´t plan on doing for now).
So here comes the real question. Will a nice Intel core i5 do the trick with the graphics card or is it bottlenecking it´s potencial? Also will a Thermaltake ToughPower 650W GOLD give me the juice I need for all my needs?
I´m gonna post what we've got so far so feel free to criticize on any choice. (I haven´t built a PC before so I´m new at this)

This are the first components we chose
Processor: Intel core i7 4790k (Recommend a nice heatsink)
Motherboard: Asus H97-plus or Asus Z97-A (can really choose any MB you guys suggest)
RAM: Kingston HyperX Fury 16GB (2x8GB) kit (Should I get 16GB?? or are 8GB enough?)
SSD: Samsung 840evo 250GB
HDD: WD Blue 1 TB Desktop Hard Drive: 3.5 Inch, 7200 RPM, SATA 6 Gb/s, 64 MB Cache - WD10EZEX
PSU: Thermaltake Toughpower 650W GOLD (great reviews so far, modular which is great)

Haven´t chose a case yet, I plan on doing so after having the components chosen, the same goes about cooling

Thanks in advance and sorry for any grammar errors, English is not my native language and I'm a total n00b about building PC's so take it easy on me

EDIT: actually the budget is between 1000$-1500$

 

[Darkbreeze]

Is this rig to be used exclusively for gaming or will you be running any high end applications?

Do you plan to overclock EITHER the GPU or the CPU?

What country are you in?

 

[Fundilloman]

Is this rig to be used exclusively for gaming or will you be running any high end applications?

Do you plan to overclock EITHER the GPU or the CPU?

What country are you in?

I plan to run architecture software rendering, autocad and such, anyways gaming will be it´s primary use.
I dont think neither of us is going to OC either of them, but it may be a possibility in the future.
I live in Panama (central america next to colombia) and we get shipping from amazon so I plan on buying the lightweight stuff there (CPU, RAM, vCard, SSD, HDD) and buy the heavy stuff here in a pretty good but a little bit expensive PC shop (case, fans, heatsink, PSU, monitor and such).

 

[Darkbreeze]

Well, generally we recommend other PSU brands over Thermaltake. Most their units suck but the Toughpower series is generally good although that particular model doesn't get all the high marks other models in the series are given.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story4&reid=94

There are better PSUs to be had for less, in general, but considering your location and what may or may not be available to you, it might be a good choice. If you can get a similar capacity Antec High Current Gamer or better yet, an EVGA G2 series, you would be on point, and probably save some money.

Aside from that I'd say that if you plan to run rendering and CAD applications you might want to stay with the i7 as it will be a better performer in those tasks but for gaming, if that is your main concern, the i5-4690k games on par with all of the Haswell refresh i7's for a lot less investment.

 

[Darkbreeze]

I'd also go with the Z97-A and stay away from the H97 boards for thermal reasons. Especially if you EVER plan to overclock. Most of the H97 boards can't, some can, but all of the Z boards are at least capable of it even if many of them pose a very poor choice for doing so. These boards are all good choices from best to least.


Best (As seen on Meteorsraining's tier list)

Z97X-Gaming 5 (not to be confused with MX version)
GAMING 5
EXTREME6 (AC as well)
UD5H (BK as well)
Z97-PRO (AC as well)
MAXIMUS VII HERO/ RANGER/ GENE/ IMPACT/ FORMULA (great boards for OCing)
GA-Z97X-SOC
Z97 FTW
Z97X-Gaming 7
MSI GAMING 7
PROFESSIONAL
MPOWER (MAX AC edition as well)
DELUXE (NFC&WLC edition as well)
Gaming 9 AC
Z97-GD65 Gaming
OC Formula (mATX version included)
PRO GAMER
Z97X-SOC-FORCE (no M.2, but great for OCing, has SATAe)
Sabertooth Mark1/ Mark 2 (no M.2, great for OCing)
G1 SNIPER (No M.2, but this MoBo hit 5Ghz mark stable in some reviews)
Z97 Gryphon

One step down but still very good:

Z97X-SLI
MX-Gaming 5
G55 SLI
G45 Gaming
Z97S SLI Plus
Fatal1ty Z97X Killer (mATX included)
EXTREME4
Z97X-Gaming 3
UD3H (BK as well)
Z97-A
Z97M Gaming
Z97-E
Z97-AR
Z97S SLI Krait Edition
Extreme3 (no M.2)

Here is the Z97 tier list which is pretty representative of performance placement, value and features:

http://www.tomshardware.com/forum/id-2383187/motherboard-tier-list-z97-chipset.html

Also forgot to add, which I had planned to since it was in your original question, but forgot, that as gkay09 stated, 8GB of RAM is fine for most if not all current gaming titles. The CAD and rendering applications though might benefit to varying degrees from 16GB and there ARE a couple of gaming titles that the development centers have indicated benefit from it as well but that's going to be the extremely unlikely exception, and not the rule.

At least for now. With the explosion of cheap hardware and increased demand for better and faster rigs, some of these developers may start coding for more extraneous hardware support independent of the GPU so don't be surprised if more titles start increasing the recommended (Not minimum, but best performance recommendations) amount of system RAM over the next year or three.

 

[gkay09]

Good setup,..
Here are some suggestions

CPU - Intel Core i5-4690K - No significant performance decrease. Also being a 'K' CPU, it has unlocked multiplier and very easy to overclock.
http://www.newegg.com/Product/Product.aspx?Item=N82E16819117372
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-4.html

Mobo -
http://www.amazon.com/ASRock-DDR3-Motherboards-Z97-EXTREME4/dp/B00K6JKTDI?SubscriptionId=AKIAIEF7KZG4SSIJ7QQA&tag=toms_shopping_rev-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B00K6JKTDI&ascsubtag=
Review
http://www.tomshardware.com/reviews/mainstream-gaming-z97-motherboard,3824.html

8GB of RAM would suffice now. Anyways you can add 8GB more if needed. Also the graphics card come with additional 2GB+ anyways. But its upto you though.
This is on sale has $25 discount till 22nd Dec
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231568

CPU Cooler - One of the best value and very good performing cooler
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
or a little more performance oriented, you can check the Noctua ones...

PSU - This a good alternative. Enough power for SLI/ Crossfire and equally efficient.
EVGA 750W 80+ Gold
http://www.newegg.com/Product/Product.aspx?Item=N82E16817438017
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=380

CASE
Corsair Carbide, Cooler Master HAF series are some of the good ones out there.

 

[Darkbreeze]

Your case choice should be based on features like cable management, number and size of fan locations, with or without PSU shielding, radiator support (If you go with liquid cooling) or CPU height support if you go with air, front USB locations (Some places are just better than others to stick a USB port), amount of room inside the case for working with components, hard drive cage features (Tool free, removable cages, rotating cages, cage design for air flow) and the quality of workmanship.

Those criteria are far more important than what it looks like, which almost always is misleading. The best looking cases are nearly always the ones with the least valuable features. As you move up in price, that starts to change a bit though.

The cases I personally like in the middle of the pack, which is where most people purchase at, mostly come from Corsair, Cooler Master, Phanteks, Rosewill and in the upper echelon, the Lian Li cases are pretty much untouchable. But those are extremely extreme solutions that the average user cannot justify.