a piece of cake but if you wanna upgrade the rig, why not build your own PC? it is better than the pre built PCs. If you put in a more powerful video card in the CyberpowerPC, you may need upgrade a higher PSU as well, some times the vendors won't put in a good PSU in the rig. 4GB RAM will be more than enough but yup, you can upgrade it.
Only the Paranoid Survive
T-T
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