PS3 Frankenstein PHAT PS3: CECHA with 40nm RSX

Yes I've already put the tantalizers, however I fixed the problem by doing a GPU reflow with a new profile with a slower ramp and reaching higher temp peak (220°C), now I am testing it since 15 hours ago with gran turismo 6 demo and it hasn't frozen.
Did you fixed both frankies with new profile?
 
Yes I've already put the tantalizers, however I fixed the problem by doing a GPU reflow with a new profile with a slower ramp and reaching higher temp peak (220°C), now I am testing it since 15 hours ago with gran turismo 6 demo and it hasn't frozen.
Interesting. Are you actually nudging the BGA during reflow, or just letting it sit and fully reflow on its own?

My two cents: I only pull RSXs from known-working Slims. I try to avoid random loose chips where you have no idea what profile was used, how many times it was heated, or what damage may have already been done.

With leaded balls, around 200°C at the chip should normally be plenty, assuming your thermocouple is accurate. I've seen cheap Amazon/China thermocouples read way off, so I only use lab-grade Omega TCs now. They cost a lot more, but they are consistent and trustworthy.

The only reason I could see needing to push closer to 220°C is if the pads were not wetting properly. I would make sure the pads are extremely clean. I use a three-step cleaning process: MEK, acetone, then final clean with 99.9% IPA using a nano cleaning pad.

Not saying your fix didn't work, but if 220°C solved it, I'd be looking closely at pad prep, TC accuracy, or possibly marginal wetting before assuming the RSX itself needed that much heat.
 
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