Garry's Mod Performance Issues? Not sure what's going on.

[Vanusk]

Hi, I'm having some issues with Garry's Mod. Not really sure what's going on, but when I play on certain maps my framerate drops significantly for no apparent reason.

One thing I've noted is that I get significantly less FPS on maps playing Trouble in Terrorist Town than I do playing those same maps playing Sandbox.

The two maps I've noted give me significant amounts of trouble:
-cs_office
-ttt_rooftops_f1

My framerate maxes somewhere around 300FPS when uncapped, but will just drop significantly sometimes for no apparent reason. IE I'll be wandering through the halls of cs_office with an average of 70FPS and drop suddenly to 40FPS when walking into a room. I know this probably sounds nitpicky, but nothing bothers me more than watching my framerate suddenly and inexplicably drop.

Here's the kicker, though; my specs are more than up to snuff.

i5-3570k 3.40Ghz (Quad)
8GB (2x4GB) DDR3 1600
Gigabyte G1 GTX 970 4GB (Overclocked)
Two monitors:
Primary=1920x1080
Secondary=1600x900

Here's an imgur gallery including screenshots of my GMod settings (which aren't even at max), my EVGA PrecisionX settings, and a screenshot of myself in my Liset on Warframe averaging 60FPS (which I can maintain at all times with the single exception being large amounts of Infested, where my framerate drops somewhat)

[URL="http://imgur.com/OZRHIna,wlKKpoV,3WY31dy#2"]Imgur[/URL]

Any help or advice would be greatly appreciated.

[Donkie]

Should probably be in [url]http://facepunch.com/forumdisplay.php?f=16[/url] but anyways..

Same issues playing CS:S on cs_office?
Try doing +showbudget in console, will give you a more detailed FPS counter, maybe you can pinpoint there?