8+ Sata Port Motherboard replacement / Cheap Gaming PC

[Djinni]

Since the girlfriend wants to keep this cheap and we've decided that a low-mid range laptop isn't the way to go; I'm going to replace some of the parts in my NAS tower in order to make up her new machine. This basically saves me buying a case, power supply, hard drives or an operating system.
Currently I have 6 drives in the machine.

NAS tower specs:
Antec DF30 ATX Case (now 3 years old)
ThermalTake 800W PSU (now 3 years old)
ASROCK FM2A88M EXTREME4+ MOBO
AMD A4-5300 TRINITY 3.4GHZ
NOVATECH 4GB (1X4GB) DDR3 1600
6x WD 4TB Red HDDs


I also have a screen she can use and due to a fault with SATA ports 1-4 I'm potentially looking at replacing the motherboard anyway.

So potentially I'm looking at:
+ 94.98 Motherboard: MSI Z97-G45 - http://www.amazon.co.uk/MSI-Z97-G45-.../dp/B00K8KODYQ
+ 167.50 CPU: Intel Core i5 i5-4690K CPU http://www.amazon.co.uk/gp/product/B00KPRWB9G
+ 77.99 SSD: Crucial M500 240GB - http://www.amazon.co.uk/dp/B00BQ8RM1A
+ 119.00 GPU: Sapphire Dual-X Radeon R9 270X - http://www.amazon.co.uk/dp/B00FL8H49Q
+ 19.97 Peripherals: Redragon® CENTROPHORUS Gaming PC Multimedia Keyboard and Mouse set - http://www.amazon.co.uk/Redragon%C2%.../dp/B00K0N50KW
---------------
+ 479.44

I'm still not set on any of it yet. (potentially looking to see what deals become available during the week) Seen a few Crucial and Samsung SSD's on the lightning sales on Amazon already.
And the motherboard I've found this morning only has 6 SATA ports, I need at least 8.

[Deleted]

Do they have to be all sata 6gb/sec or counting 3gb/sec too in the mix?

- - - Updated - - -

MSI Z97-GD65 Gaming Thats the cheapest i could find.

[Djinni]

6GB/s would be good... But theyre only 7200RPM drives, so shouldn't made a HUGE difference I expect.

I may be able to get a replacement board for no extra cost yet. So I'm also open to suitable AMD CPU options. Potentially:

AMD APU A10 6800K Black Edition
http://www.amazon.co.uk/dp/B00CPLGGXM

[Masark]

6GB/s would be good... But theyre only 7200RPM drives, so shouldn't made a HUGE difference I expect.

3 vs. 6 won't make any difference for mechanical drives. Even a 15k drive can't saturate 3Gbps SATA, much less 6Gbps.

Most 7200rpm drives are hard pressed to saturate the original 1.5Gbps SATA.

[Djinni]

Looks like its the New Mobo route.
To be honest at that point, I'm pretty much looking at an upgrade from my own current system.

[Djinni]

Well after some jiggling around, I decided that I can use this machine for the girlfriends new gaming.
But to keep the costs down we're just going to send the faulty motherboard back to be repaired/replaced. Then she can use it when it comes back.

In which case, I need to know which is currently the best AMD CPU that I could possibly put in this board?

Plan is currently:

Antec DF30 ATX Case (now 3 years old)
ThermalTake 800W PSU (now 3 years old)
ASROCK FM2A88M EXTREME4+ MOBO
8GB DDR3 RAM

AMD A10 7700K Black Edition - http://www.amazon.co.uk/gp/product/B00H7Z7XA6 - £101.91

Not sure yet whether it would be better to give her my 560ti and up the card in my machine to a
Asus Nvidia GeForce GTX 760 DirectCU II OC 2GB
so that it better supports my multiple screens, or to give her a new AMD card so that it pairs better with her cpu. (Is there any performance gain to be had there?)