is this computer solid and good for gaming

[spider monkey]

intel i5 4670k

corsair h100i

msi z97 gaming 7

sapphire r9 280x dual x

kingston red series fury 16gb 1600mhz ram. (8gb x2)

corsair RM 750 watt psu

corsair air 540 cube case

ADATA 128gb premier pro ssd

western digital black 1 tb hdd

 

is the psu good and can it support another r9 280x for crossfire which i will do later on

[Jade]

Yes, and yes. Should be fine.

[PassionFruit]

Yes, it is not liquid. Yes, even 650 watts is enough an is good.

[Levent]

yes and yes you can save up on ram price with getting 8gb ram you wont need more than 8 for gaming

[Superarragon]

Looks good, but get a 4690k. The PSU can support another 280x just fine.

[Dmon]

You'd only need 8gb for gaming. And 750w PSU will have enough juice for 2 R9 280x's.

[DrunkAssassin]

Sure can I have the same PSU running HD 7950's in crossfire (basically the same card) and it is running perfectly

 

-snip-

[Izaya Orihara]

Sounds like we can get you better performance. Where are you located (if you are located in America do you live near micro center?) What is your budget? What will you be doing with the PC? 

[Guest]

intel i5 4670k

corsair h100i

msi z97 gaming 7

sapphire r9 280x dual x

kingston red series fury 16gb 1600mhz ram. (8gb x2)

corsair RM 750 watt psu

corsair air 540 cube case

ADATA 128gb premier pro ssd

western digital black 1 tb hdd

 

is the psu good and can it support another r9 280x for crossfire which i will do later on

Swap the psu for something better. The EVGA supernova g2 if you can get hold of one. As already mentioned, you can drop the ram down to 8gb, which is enough for gaming. You could also save on the cooler by going for an air cooler.

[Sauron]

Yes, it is not liquid.

 

I wanted to make that joke too D:

[LOST TALE]

Yes, it is not liquid. Yes, even 650 watts is enough an is good.

you mean 350w.

[MonkeyFace]

is the psu good and can it support another r9 280x for crossfire which i will do later on

 

You could go with 8GB of RAM, and pick up a single R9 290 instead of 280X CF. 

[PassionFruit]

you mean 350w.

For two graphics cards?

[LOST TALE]

For two graphics cards?

dualx is just the name fo the cooler

[PassionFruit]

dualx is just the name fo the cooler

 

 

is the psu good and can it support another r9 280x for crossfire which i will do later on

[Kiwiandapple]

Here is your current system you want to get in PPP. 

 

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor  ($239.99 @ Newegg)
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler  ($89.99 @ NCIX US)
Motherboard: MSI Z97-GAMING 7 ATX LGA1150 Motherboard  ($179.99 @ Newegg)
Memory: Kingston Fury Red Series 16GB (2 x 8GB) DDR3-1600 Memory  ($154.99 @ Amazon)
Storage: A-Data Premier Pro SP600 128GB 2.5" Solid State Drive  ($64.99 @ Amazon)
Storage: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive  ($88.97 @ OutletPC)
Video Card: Sapphire Radeon R9 280X 3GB Dual-X Video Card  ($279.99 @ NCIX US)
Case: Corsair Air 540 ATX Desktop Case  ($100.50 @ Newegg)
Power Supply: Corsair RM 750W 80+ Gold Certified Fully-Modular ATX Power Supply  ($109.99 @ Amazon)
Total: $1279.40
Prices include shipping, taxes, and discounts when available

 

Here is my suggestion. $150 cheaper. Better GPU, Better CPU (these things overclock like beasts I read), better HDD (a black drive isn't needed unless you read and write big files very often to it, for gaming, it has no use) same case and worse CPU cooler and RAM. The RAM is actually fine, it's just "less" wich is why I call it worse.  

 

You have a few options left to do here. Get more storage space. I would recommend a 2TB HDD and a 256GB SSD.
Or just get 16GB of RAM now.   

 

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i5-4690K 3.5GHz Quad-Core Processor  ($239.99 @ Newegg)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler  ($29.98 @ OutletPC)
Motherboard: MSI Z97-G55 SLI ATX LGA1150 Motherboard  ($125.99 @ Amazon)
Memory: Avexir Core series 8GB (2 x 4GB) DDR3-1600 Memory  ($68.99 @ Newegg)
Storage: A-Data Premier Pro SP600 128GB 2.5" Solid State Drive  ($64.99 @ TigerDirect)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive  ($51.99 @ Amazon)
Video Card: XFX Radeon R9 290 4GB Double Dissipation Video Card  ($369.99 @ NCIX US)
Case: Corsair Air 540 ATX Desktop Case  ($100.50 @ Newegg)
Power Supply: Silverstone Strider Plus 850W 80+ Silver Certified Fully-Modular ATX Power Supply  ($83.50 @ Newegg)
Total: $1135.92
Prices include shipping, taxes, and discounts when available

 

I can as well ask you to have a look at these 2 cases. 

Link to product page and an unboxing. 
NZXT H440 - Unboxxing

Phanteks Enthoo Pro - Unboxxing

So far these are absolutely the BEST cases around for the price. Both are $100
My personal opinion goes out to the Enthoo Pro if I had to buy a new case.