Question about ram

[Dreadblood86]

this is my pc's specs for so you have the info for my question.
asrock z97 pro motherboard
750 ti gpu
650w power suply
4g ram
now for my quesiton, im looking to upgrade my ram and i was looking that the vengeance series if i go 2 8g sticks would i need more power or would 2 4g sticks be enough

 

[Lutfij]

You forgot to mention the processor in your Z97 board and the frequency for the ram kits you're interested in buying. On top of that you forgot to state which Pro you have since there are a number of ASRock Z97 Pro boards out there. Can you pass on a link to the ram kits? I'd suggest you sell the single stick of 4GB of ram and buy a 2x4G kit or the 2x8B route to take advantage of dual channel memory.

You also forgot to mention the make and model of your PSU. The age of the PSU will also govern the effective power it can output.

 

[Dreadblood86]

fairly new to pc building does this help
650Watts - Corsair CX600M CX Series Modular 80 PLUS BRONZE Certified Active PFC used for 2 years
8GB (4GBx2) DDR3/2133MHz Dual Channel Memory
Cooler Master Hyper 212 EVO CPU Cooler w/ PWM fan
Intel(R) Core™ i7-4790K 4.0 GHz 8MB Intel Smart Cache LGA1150 (All Venom OC Certified)
24X Double Layer Dual Format DVD+-R/+-RW + CD-R/RW Drive
2TB (2TBx1) SATA-III 6.0Gb/s 64MB Cache 7200RPM HDD
ASRock Z97 Pro4 ATX w/ Intel GbLAN, 2 PCIe x16, 2 PCIe x1, 2 PCI, 1 x M.2, 6x SATA 6Gb/s

and if i understand it correctly this is then one i was looking at and i also was wondering if my motherboard can run a 980ti or 970 gpu as well
Corsair Vengeance Pro 16GB (2x8GB) DDR3 2133 MHz (PC3 17000) Desktop, Red 1.5V