In your Frontlines test I noticed you have Foliage turned up. Are you experiencing major halting/stuttering with that turned up? I can play that game maxed out on my Ultra except for that setting. Just about anyone I talked to with any card (besides 9800GX2) has this problem unless Foliage is turned off. It plays great for a few seconds, halts for a few seconds, plays for a few seconds etc.