What are the minimum PC requirements for Tekkit on full setings?

OK, I'm building a gaming PC, and I'm going to host a small server for maybe 4 people including myself to play Tekkit on. Here are my parts:

Powercolor Radeon R9 270X DEVIL 2048MB GDDR5 PCI-Express Graphics Card

AMD FX-8350 4.0 GHz (can be overclocked to 5.0 GHz), 8 cores.

2x4 GB RAM DDR3 1600 MHz

ASRock 970 Extreme3 R2.0 AMD 970 (Socket AM3+) DDR3 ATX Motherboard

Windows 7 Home Premium 64-bit

Is this good enough for a Tekkit server of my description, or will it cause me to lag. I don't know if it will help, but my friends will be playing on computers and laptops NOT specialised for gaming. Also, am I going too overkill for a Minecraft Tekkit server? I know in the PC gaming industry that there's no such thing as overkill, but will this setup cause me to get something like 150+ FPS? I'm not bothered too much about FPS, anything 60 FPS or above on full settings is fine for me!

I hope this post is a joke (Sorry if it's not).

Considering this PC can max out Battlefield 4 at 1920x1080 resolution without any lag…

That PC can run Tekkit at maximum settings and MAYBE shaders at far over 60 FPS.
It is pretty overkill for Minecraft.