I always read while researching that many users only experienced slow browsers on the first start, after which the browser would be have normally for the duration of the session that the machine was on. I read previous posts about removing TimeShift, and that made no difference. Everything else seems fairly snappy, but it just hangs up on the browser. Switched to Mint (Uma) and repeated the same process. Running top didn't show anything interesting, even during the lock-up phases. I've always been a Mint fan, but decided to try Manjaro first (which is equally nice, IMO), and noticed the same issue of the computer grinding to a complete halt when attempting to open the browser. I will note that I tried with the original 2x2GB modules as well, and the results were the same. I did put in the original 4GB, 1600MHz module from the 2011, and while Ark says the 520M was rated up to 1066MHz, the issue I'm experiencing doesn't seem to related to the increase memory frequency. I remembered I had my 2010 MBP, with the i5-520M, and a GeForce GT 330M all it needed was an SSD, and the old RAM module from the 2011 (I'd happily give it the 16GB I put in the 2011, but the 520M can only recognize up to 8GB). Sourcing a 2012 board as a drop in replacement was another option, but ultimately not cost-effective in the grand scheme. Those who had their dGPUs replaced under Apple's extended repair program ultimately encountered the same issue some time later. I used to do board repair, and could easily get a replacement chip and take on a BGA chip replacement, but I don't feel that's worth it either given the fact that any NOS/used chip is likely doomed to fail the same way. With the recent demise of my 2011 MacBook Pro (the AMD gpu issue finally got me after over a decade of faithful service), I decided that attempting to flash the MUX (using DOSDUDE1's method), or attempting to disable the dGPU within the Recovery OS and relying on the iGPU for a sluggish experience wasn't going to be the way forward.
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