Hi guys !

I'm thinking about a new computer, mine is 4 yo and I think it's time for an update.

Mobo : Z87 Sabertooth

Proc : i7 4770

Graphic card : Sapphire Vapor-X R9 290 uefi

SSD/HDD : A mix of Samsung 840 as primary drive /  I'll keep my trusty crucial m25 for steam / and some teras of HDD.

730W PSU

I like the input of tech savvy people from here, all advices and criticism is much appreciated. 

A very nice build I must say ...

Sounds good!

What about RAM? And what model is the PSU?

As a hardcore PC enthusiast, you are wasting a ton of money on that processor and motherboard, especially if you don't plan on doing any intense video-editing. Go with an i5 4570k and an ASRock z87 Extreme4 mobo, and spend the extra cash on a better PSU.

Edit: Also, stick with 8gb of RAM, and get a decent air-cooler (STAY AWAY FROM LIQUID COOLING, unless you are willing to shell out for a custom set-up, since the pre-built ones are overexpensive and in so many ways inferior to air-cooling). Make sure your PSU is 850W or more (in case you decide to crossfire down the road), and at minimum bronze certified so it dosen't fry your entire system. 

Will gaming be the primary use for the pc? If so the cpu and mobo are a bit much.

If you have a limited budget, i5 + sli 770 4gb is probably a better $/performance bet. It's not that the 290x is slow by any stretch, but that 770 dual is even better. If you want dual 290s someday, stick with the 290x though.

My goal is something future proof for the next 3 4 years, like being able to push those next Star Citizen, The Witcher 3, UT4, Elite to their limit. I've the chance to say that money is not really a problem, but my main criterias are more technical ones, like reliability, and I want something really fast (eg responsive, start/stops in a few seconds thanks to uefi)

- I've never considered SLI, but maybe going through the sli in the future might be a good option

- Gaming is indeed the primary use of the pc, also CAD

- 850W PSU for a future SLI is a good idea.

- Forgot to specify RAM, I was going for 8Go of Ram. Still looking for the corret pacjkage though ^^

If you want a bit of future proof build, I'd go with one of the new Z97 boards that support now-old intel 1150 CPUs (like the 4770K), current ones (like the 4790) and I think they'll also support the next iteration.

As for CPU, if you plan to overclock then an i5-4670K would give you almost the same performance as the 4770K for a lot less money. If you don't... get the non K version. It's more than enough for the next years, and if something happens and it is not, you can get one of the newer CPUs (if you've got one of the new mobos) that will give you more for less than what costs the 4770.

1. Future-proofing will depend on either updating your graphics cards or crossfire (SLI is for Nvidea cards). Crossfire is cheaper and a good option, especialy if gaming on a 1080p monitor.

2. Unless you are doing professional CAD, stick with the i5 4570k (the 4670 has only a 5% gain over it, not worth it at all especially since OCing the k version of the 4570 will outpace any stock chip).

3. Definitely. Go for a modular PSU that is bronze-certified at minimum, and it will save you a lot of time and hassle in the future. The PSU is perhaps the most important thing in a future-proof build.

4. 8gb RAM @ 1600 MHz is perfect for your build, and easily upgradeable as long as you get two 4Gb chips (don't get a 8gb chip, they can be expensive, and getting seperate 2gb chips will make it hard to upgrade in the future). 

Finally, just remember that no build is truly future-proof. There is no way to guarantee you will be playing on ultra 4 years from now. I can guarantee that you should be able to get the highest setting on almost any game coming out in the next two years, and if you crossfire, another year after that as well. If not, you'll still be playing on high, which is still eons ahead of the consoles.