Final Build Advice?

[QuadRings]

Hello. I've been putting a Steam Box together, and I need to know if it'll perform. It'll be plugged into a 1080p TV, and will need to play things like SPiNTiRES and Cry Engine games at at least high quality. Noise is no issue, and I am going for Negative Pressure. Thanks for any help!

PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 860K 3.7GHz Quad-Core Processor ($69.99 @ NCIX US)
CPU Cooler: Corsair H60 54.0 CFM Liquid CPU Cooler ($54.99 @ Newegg)
Motherboard: Gigabyte GA-F2A88XN-WIFI Mini ITX FM2+ Motherboard ($89.99 @ SuperBiiz)
Memory: Kingston HyperX Fury Black 8GB (1 x 8GB) DDR3-1866 Memory ($48.99 @ Amazon)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($52.49 @ OutletPC)
Video Card: Zotac GeForce GTX 960 4GB AMP! Edition Video Card ($233.98 @ Newegg)
Case: Corsair 250D Mini ITX Tower Case ($79.99 @ Newegg)
Power Supply: EVGA SuperNOVA NEX 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($59.99 @ NCIX US)
Case Fan: BitFenix Spectre Pro LED 148.7 CFM 200mm Fan ($18.99 @ SuperBiiz)
Case Fan: Antec 761345-75020-2 34.0 CFM 80mm Fan ($6.89 @ OutletPC)
Case Fan: Antec 761345-75020-2 34.0 CFM 80mm Fan ($6.89 @ OutletPC)
Case Fan: Noctua NF-F12 industrialPPC-3000 PWM 109.9 CFM 120mm Fan ($23.98 @ OutletPC)
Fan Controller: NZXT SENTRY 3 Fan Controller ($29.88 @ OutletPC)
Other: SteamOS installed by flash drive ($0.00)
Total: $777.04

 

[BrADASS]

IMO
-you should get 2 sticks of ram for dual channel.
-Get an ssd
-you dont need 750W power supply for this
-go intel if you can afford it
-personally I love the Silverstone Raven

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

CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($166.95 @ SuperBiiz)
Motherboard: Gigabyte GA-Z97N-WIFI Mini ITX LGA1150 Motherboard ($100.99 @ SuperBiiz)
Memory: Kingston HyperX Fury Black 16GB (2 x 8GB) DDR3-1866 Memory ($85.99 @ Amazon)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($97.95 @ OutletPC)
Video Card: EVGA GeForce GTX 960 4GB SuperSC ACX 2.0+ Video Card ($223.98 @ Newegg)
Case: Silverstone RVZ01B Mini ITX Desktop Case ($79.99 @ Directron)
Power Supply: Silverstone Strider Gold 450W 80+ Gold Certified Fully-Modular SFX Power Supply ($88.98 @ Newegg)
Total: $844.83
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 13:28 EDT-0400

 

[Xemko]

I have made some changes :
PCPartPicker part list / Price breakdown by merchant

CPU: AMD Athlon X4 860K 3.7GHz Quad-Core Processor ($69.99 @ NCIX US)
CPU Cooler: Corsair H60 54.0 CFM Liquid CPU Cooler ($54.99 @ Newegg)
Motherboard: Gigabyte GA-F2A88XN-WIFI Mini ITX FM2+ Motherboard ($89.99 @ SuperBiiz)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($50.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($52.49 @ OutletPC)
Video Card: PowerColor Radeon R9 280X 3GB TurboDuo Video Card ($200.50 @ Newegg)
Case: Corsair 250D Mini ITX Tower Case ($74.99 @ Micro Center)
Power Supply: EVGA SuperNOVA GS 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($74.98 @ Newegg)
Case Fan: BitFenix Spectre Pro LED 148.7 CFM 200mm Fan ($18.99 @ SuperBiiz)
Case Fan: Antec 761345-75020-2 34.0 CFM 80mm Fan ($6.89 @ OutletPC)
Case Fan: Antec 761345-75020-2 34.0 CFM 80mm Fan ($6.89 @ OutletPC)
Case Fan: Noctua NF-F12 industrialPPC-3000 PWM 109.9 CFM 120mm Fan ($23.98 @ OutletPC)
Fan Controller: NZXT SENTRY 3 Fan Controller ($29.88 @ OutletPC)
Other: SteamOS installed by flash drive ($0.00)
Total: $755.55
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 13:25 EDT-0400

Better 2x4gb memory kit, for dual channel (up to 10-15% performance).
Better GPU, for less.
650w will be enough for this build. Better quality Tier 1 PSU. Tier list. http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html EVGA NEX is tier 3 unit.

 

[QuadRings]

Will this XFX be better than the Powercolor?

http://pcpartpicker.com/part/xfx-video-card-r9280xtdbd

 

[Xemko]

This one is a killer deal :
PCPartPicker part list / Price breakdown by merchant

Video Card: Sapphire Radeon R9 280X 3GB Video Card ($191.98 @ Newegg)
Total: $191.98
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 16:43 EDT-0400

Review : http://www.tweaktown.com/reviews/6529/sapphire-radeon-r9-280x-3gb-vapor-x-oc-video-card-review/index17.html

In terms of performance/value Sapphire is the choice, Slightly more OC XFX doesn't not worth extra money.
Performance : XFX > Sapphire > Powercolor , but difference is really minor.

UPD: This is even more premium deal :
PCPartPicker part list / Price breakdown by merchant

Video Card: XFX Radeon R9 290 4GB Double Dissipation Video Card ($239.99 @ Newegg)
Total: $239.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-07-09 16:46 EDT-0400

 

[QuadRings]

Yeah, that XFX is what I meant. But that Sapphire is about 5mm too long for my case, it destroys airflow and cools pretty badly.