Massive FPS Drop on High Spec Rig ?

[maarten12100]

as it's an indie game
It is not it has its own engine.
By setting it to max do you mean you maxed out SSAO settings?
Is this system new as your card might be an unlocked 6950 which became instable over time.
Just my 2 cents
You also claim the temps are good how good is good sub 90's is fine higher isn't good.
How is your power supply is it stable?

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No, it's overclocked through Catalyst Control Centre. Have reset it to factory clock speeds and the problem persists though.

I've had it for over a year with no problems now.

No, it runs Crysis 2 (max settings), Battlefield 3 (max settings) and ArmA 2/DayZ mod (high settings) without issue.

The fact that reading a letter (probably the least GPU intensive part of the game) caused the FPS drop makes me think the problem is not with my graphics card.

Driver sweeper and new beta drivers might resolve it

But as this is a OpenGL title it might be something else.
Can you tell us what the vram usage is once you read the note?