Does anyones hardware/gpu seem to need to 'warm up' ?

[Defy Belief]

I've just noticed this recently, i've got a 120hz monitor now so i've toned down a few of the settings on BF3 to achieve a average 120fps.

Now for the first 5 minutes of a game it feels quite choppy, the fps counter still states it's over 120 but it feels like i'm almost lagging, the ping is fine so I don't think it's the connection.

After around 5 minutes it's smooth as silk and runs perfectly, it's almost like my 670 is needing to warm up before it can be bothered.

Is this normal and does anyone else have this?

 

[Defy Belief]

Just tried blops and it's fine from the start, must just be something my pc doesn't like with BF3 to start with.

 

[Defy Belief]

I also get this in BF3

It's the only game it happens with for me, perfect after a few minutes.