Old CPU and New GPU

[OhSooCruddy]

I have the Lenovo H30 with intel pentium j2900 and want to buy Sapphire AMD Radeon R7 250 Graphics Card and run games like WoW(World of Warcraft) on high settings, will i have a problem doing so?

also i have 8gb ram..

 

[Ryarwood99]

MMO's are more CPU reliant, so your GPU will do fine... even better if you can stretch to the 260x, but your CPU may bottleneck it

 

[OhSooCruddy]

So should i also get Intel Pentium G3258 CPU , guessing this will help? and also since my current cpu is intel pentium j2900 i was wondering if it will fit in my motherboard? and will the 260x even fit in my pc considering i need to use a low profile bracket?