probably not related to your aim

sometimes i've found that by playing other games, especially ones without raw unaccelerated mouse support, running at abnormal framerates or with input lag, it messes up my tf2 aim

i have a similar question though, i have a wireless mouse, why did it poll at 1306 Hz? that's remarkable

http://puu.sh/mXqSA/71734732ac.png

@OP even without the spikes, that doesn't look like very stable polling, especially 1000hz.

here's my zowie FK2 1000hz polling:

http://i.imgur.com/fUlCZJT.png

polling can be even more stable than that, but this is just to give you a reference.
seeing 125 / 250 / 333 / 500 is normal, but your MMR shows way too many 'off' numbers.

the older zowie mice reportedly had some issues with polling, but i'm not sure to what extend.
it could be a hardware issue if your AM has the 3090 in stead of the newer 3310. in that case there's not much you could do.
it could also be your motherboard being crap. or other USB devices hogging the power.

do you have other mice you could try?
also, try different CPI steps to see if that gives you different results.

i'm going to try a different mouse and my mouse on a different pc. could be some problem with usb drivers?

can't imagine it's an issue with your USB drivers. because USB mice don't need them (well they do - but the default drivers that Windows has are fine)