RAM support and CPU selection

[studiologe]

Hello together,
I'm new to the forum!
I just had a quick question, I'm building a new pc
and I'm planning on using the following components
Mainboard: "Asus Rampage iv Extreme"
CPU: "Intel Core i7-4930K Ivy Bridge-E"
Originally I was going for the "Intel i7 4960X ivy Bridge", but I don't think the difference in benchmark result
are that great, that I need spend almost twice as much for it.
My question is just about the L3 cache (12MB on 4930K vs 15MB on 4960X), does those 3MB make that much
of a difference, that it is worth spending the extra $500?
RAM: I saw that both CPUs only supports DDR3-1333/1600/1866, therefore my question if it makes a difference if I buy memory
that is DDR3 2400, or if that is basically just a waste of money, because the FSB of my memory is higher than what my
CPU can provide?


My questions summary is:
1) L3 cache importance (12MB on 4930K vs 15MB on 4960X), do those 3MB make that much
of a difference performance wise, that it is worth spending the extra $500?
2) Both CPUs only supports DDR3-1333/1600/1866, therefore my question if it makes a difference if I buy memory
that is DDR3 2400, or if that is basically just a waste of money, because the FSB of my memory is higher than what my
CPU can provide?


Thank you for helping me in this matter :-)
As I'm excited to get my parts on order and start throwing it together.....

 

[Wicked Mystic]

My questions summary is:
1) L3 cache importance (12MB on 4930K vs 15MB on 4960X), do those 3MB make that much
of a difference performance wise, that it is worth spending the extra $500?
2) Both CPUs only supports DDR3-1333/1600/1866, therefore my question if it makes a difference if I buy memory
that is DDR3 2400, or if that is basically just a waste of money, because the FSB of my memory is higher than what my
CPU can provide?

1. No. That 500$ goes almost completly to waste.

2. Forget FSB bacause there isn't FSB anymore. DDR3-1866 memory is enough, just make sure it's 1.5V.

Personally I don't recommend either of those processors because motherboard platform is obsolete.