[CS:GO] Server var problems

[foo2bar]

Hello,
i have a problem with my server. I have a high var for the performance.

my Server:
http://www.webtropia.com/en/root-server/economy-dedicated-server-details.html?pid=i53450

Server OS: Debian wheezy 64bit
Processor: Intel Core i5-3450 CPU with 4 x 3,10 GHz
Ram: 16GB
Game(s): Only 1 csgo server with 14 slots

Settings:
i use this script: http://danielgibbs.co.uk/scripts/csgoserver/ and only changed the tickrate to 128

My var performance is 1.5 - 2.5 @ 10 players. My friend got a vserver and got a better var then me (~ -0.5). I tried the same settings and i have still more var then him. I also tried to change some settings (like sys_ticrate [default, 1000, 2000] and ...) and it didnt changed much.

I googled a lot and i didnt found any help. I hope some1 find the issue.

here a htop screen (me + 9 bots):
https://www.dropbox.com/s/5sved0lw2ir8lnl/csserver.png

[TUSK3N1337]

When I got a var problem, I moved the server file from (D:) To (C:) My Faster Drive And The First One Then It Got Smooth!