New Patch = more lag?

Back in September I bougth a new video. Doesn't matter what's the exact model, but I had a good 100-120 on 16 players on EE or BW. Now since last 2-3 patches my fps keep going down to 35-50 on 16plrs. I tried GameBooster, but it doesnt change anything to the fps (Since it clears mostly CPU working programs). Now, the registration of bullets is also different. Is it because people have lower fps too even lower like 20-30 so it causes a bad registration on servers? And does any GM know why each update = less fps...

Thanks - [Crazy-Bear]

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