I am hosting two brink servers on my Windows 2008 Box and I’ve noticed this weird periodic spike that happens approximately every 10-20 seconds. Wondering if anyone has experienced something similar and have suggestions on what I can do to fix this?

On the picture, the first example is from a server where I was not experiencing the spikes and the red line ran mostly uninterrupted. The second example is from one of my servers where this jump in the line happens every 15 seconds or so, all the time - causing a minor hiccup in the game.
My server is sporting a Quad-Core Xeon 2.53GHz and 8Gigs of ram along with a 100mbit port to the backbone so I’d be pretty surprised if the problem lies there. The only other instances running on the server is an IIS web server and MSSQL database serving one low traffic website. Network utilization never goes above 4%
Example commandline:
+set net_ip <IP> +set net_serverDedicated 1 +set net_serverPort 27015 +set net_serverPortMaster 27016 +exec f1.cfg
Sparse config:
net_serverAllowHijacking 0
exec server_objective_advanced_vs.cfg
spawnServer mp/aquarium