No.... I have 20% strength, as of right now, I am spending Christmas and New Years with my father.
And I have an excellent online experience with such a low signal strength.
Try unplugging the power from your moden and router, let it sit for 30seconds, and then plug the power back.
Also, if other people are downloading and streaming stuff while you play online, it will affect also.
If Cod is working fine then theres not a problem with your internet, It must be Rockstars servers?
If it's only one game you're having problems with then it's probably not your WiFi signal strength.
I would do one of the following:
- Look up which ports Max Payne 3 uses and forward/opeb them in the router
- DMZ your PS3 by assigning it a static IP then DMZ'ing that IP in your router
If you're unfamiliar how to do either just do a search on the forums. There are several very good step-by-step guides.