Planning to upgrade AMD rig. $165 additional dollars for 4-4.5 Ghz, 16GB RAM & 2×R9 270x. Worth it?

[Cuki01]

I bought a prebuilt rig, because it was actually cheaper than individual parts in my country.
I never tinkered with hardware before, so this is my first time to OC, add RAM, do Crossfire etc, so any tips would be appreciated!

So my plan was:
-Add the Cooler Master Hyper 212 EVO, because the stock cooler sounds like a fighter jet. [Done]
Yet to do:
-OC FX-6300 to at least 4GHz, but won't push over 4.5GHz, seems too much to ask for.
(All tutorials online use different BIOS than mine, and I just can't find the right settings they use. Is there a good program that I can use from Windows?)
-Add another R9 270x to do dual Crossfire. (125$) (The one available PCIE Slot is 2.0, which is, if I checked correctly not a deal-breaker, and performs quite well nevertheless)
-On top of existing 2×4GB add another 2×4GB RAM. (I'm still not sure about the exact model of RAM, so I'll just grab two sticks of 4GB that are clocked at 1600MHz, as well as the current RAM. Is that fine?)

So, in total its around $200, but, if we ignore the cooler, which just was a necessity (Noise was horrible), the optional and main part of the upgrade would be around $165.

How much would the performance improve? Could I run most modern games at 1080p 60FPS at the highest settings? Is it worth it? It seems like a great deal to me, but I'm not sure.

P.S. What about the power supply? How much Watts does it need? Is there something else to look out for with them? How much would it cost? (I appear to have a 600W PSU, and an online calculator says I'll use 556W, after the upgrade, and just in case to have a 606W PSU. So if I entered everything correctly, I do not need a new one?)

P.P.S. I've heard of better usage of Crossfire and AMD overall on DirectX 12, but devs not utilizing it to the full extent yet. So if I were to use DirectX 12, I'd have to install Windows 10? Should I do it for optimal performance?

Thanks in advance!

 

[technoholic]

need to know your PSU make and model first, dual 270x will require a considerable amount of power plus the CPU overclock. Your power arsenal should be in good hands. About performance, it's hard to guess because xfire is kind of a hit or miss thing, so a good app support is needed

 

[Cuki01]

need to know your PSU make and model first, dual 270x will require a considerable amount of power plus the CPU overclock. Your power arsenal should be in good hands. About performance, it's hard to guess because xfire is kind of a hit or miss thing, so a good app support is needed

I have Chieftec GPS-600A8. I took both the OC & Crossfire into consideration, as well as case fans, 4 LEDs on the case and etc. when using this: http://outervision.com/power-supply-calculator

 

[technoholic]

Friend, i'm sorry but you need a new PSU if you want to Xfire 270xs. A r9 270x requires 24A from +12v rail and 2 of them will theoretically require min 48As. Your current PSU can provide max 46A but as i see it, it's not a reliable unit. check your current PSU specs here:
http://www.chieftec.eu/en/psus/smart-series/gps-600a8.html

And you can also check r9 270x amperage requirement here:
https://forum-en.msi.com/faq/article/power-requirements-for-graphics-cards

edited: fixed r9 270x amp needs 24a not 23. So dual cards will exceed your PSUs capabilities

 

[Cuki01]

Friend, i'm sorry but you need a new PSU if you want to Xfire 270xs. A r9 270x requires 24A from +12v rail and 2 of them will theoretically require min 48As. Your current PSU can provide max 46A but as i see it, it's not a reliable unit. check your current PSU specs here:
http://www.chieftec.eu/en/psus/smart-series/gps-600a8.html

And you can also check r9 270x amperage requirement here:
https://forum-en.msi.com/faq/article/power-requirements-for-graphics-cards

edited: fixed r9 270x amp needs 24a not 23. So dual cards will exceed your PSUs capabilities

Would LC Power LC600H work? Or, alternately Antec VP700PC?

 

[technoholic]

Friend, i'm sorry but you need a new PSU if you want to Xfire 270xs. A r9 270x requires 24A from +12v rail and 2 of them will theoretically require min 48As. Your current PSU can provide max 46A but as i see it, it's not a reliable unit. check your current PSU specs here:
http://www.chieftec.eu/en/psus/smart-series/gps-600a8.html

And you can also check r9 270x amperage requirement here:
https://forum-en.msi.com/faq/article/power-requirements-for-graphics-cards

edited: fixed r9 270x amp needs 24a not 23. So dual cards will exceed your PSUs capabilities

Would LC Power LC600H work? Or, alternately Antec VP700PC?

I checked both units specs, the LC power one can't even run a single 270x (can provide 20A from +12v rail, 270x requires 24A) and the Antec unit can provide only 35A from +12v rails which is not enough (you can check my previous message). Either way, you need a quality PSU that can offer at least 50A from its +12v rails, probably a 700w+ unit with enough cables to feed dual GPUs. So that means more cost too. Perhaps you could sell your GPU and buy a single card with better performance (like maybe a gtx 970 or maybe upcoming RX480)

 

[technoholic]

To get more information about quality PSU brands/models you can refer to this forum post http://www.tomshardware.co.uk/forum/id-2547993/psu-tier-list.html

 

[technoholic]

i'd go for something like this at minimum. http://pcpartpicker.com/product/JYyFf7/evga-power-supply-110b20750vr