I have my pi at 900Mhz arm, 500mhz sdram and 2 over volt and all the CPS 1 and 2 games fun full speed 60fps with excellent sound. Oh I have memory split to 256mb on my 512mb pi. It’s odd that your getting this performance. What resolution you have your TV set to? Try lowering to 720p/60hz (what I have) or if that doesn’t work try reinstalling fba from source. It could be that your sd card is corrupt?

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