Vista + TF2 = Lag?

I had XP with a 7800GTX, could get TF2 up to constant 60FPS
Now have Vista with a 8800GT.

COD4 can get over 100FPS on low and stays at around 90FPS (again, on low)
TF2 stays around 15-40FPS on both very very low and very very high settings

Every other game seems to play smooth as butter except TF2 (haven't tried other
souce games tho) (Tried COD4, Devil May Cry, Mass Effect, Eve Online, UT3)

Is there a problem with Source and Vista?

(edit: v-sync off, all app controlled settings in drivers)

Vista is laggier than Xp that's a fact...Legolas_Prime

Vista is laggier than Xp that's a fact...Legolas_Prime

Do you have any proof? I have vista 64 and ply tf2 maxed out max AA at around 100fps with my 9800gtx.

See the things that make this odd for me are:

- All other games work ok

- TF2 worked fine with the 7800 on XP

- I get the SAME framerate in TF2 on both LOW and HIGH settings

Thats odd. Are you using 175.19? They work great for me.

Yeah 175.19 (nintendog, those are latest and I have SP1 and all other hotfixes and updates)

Comodo Firewall (tried disabling it as well)