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Granted the ram is soldered in but if you have the 16 GB model and get the $13 in tech NVME adapter you can put it in VMESSD in it and make it haul ass big time.
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Again hands-down I think this is one of the best macBookPro‘s ever made.
MACBOOK PRO RETINA MID 2015 MEMORY UPGRADE UPDATE
You can use Rufus and the most current Windows 11 I SO and Rufus will make a bootable USB installer of Windows 11 and you can opt to make it so it doesn’t require a secure boot or a TPM chip and it will even update after the initial install. Even though Windows 11 requires a TPM chip. It’s faster than the early M1 release and can still run Win 11 natively via Bootcamp or side by side using VM or parallels. I have the mid 2015 15” quadcore intel 2.8Ghz with a dedicated 1536MB intel card and a Radeon discreet video card with 2 GB ram and it’s absolutely smokes newer Macs. One of if not the best year MacBook Pro made without a doubt! Sleek, still SSD upgradable (even to a faster nvme using a 13.00 so tech adapter. I absolutely love it and have used it for video production, Photoshop, adobe after effects etc.
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One of the best years of macBookPro ever in my opinion and I got a hell of a deal on it so it was worth the investment of a new battery and trackpad etc. I got it for 200 bucks because it had a bad battery and it was just sitting on an older gentleman‘s desk not being used. It’s the 16 GB 15 inch model with a 2.8 GHz Eye Seven quadcore and of course retina display in the keyboard and display are just as bright as when it was new. I put in a 1 TB say Brent rocket it absolutely screams. I’m running the latest developer insider version for instance and I can run it in parallel side by side or boot natively into it via holding the option key at start up. Also if you require windows you can make a bootable windows 11 installer with the program Rufus and disable the requirement of a TPM chip and secure boot and even update windows 11 to the latest version. I did this to my 15 inch and it is an absolute screamer. You can buy a $12 synthe adapter and put a super fast NVME style SSD in it rather than using apples blades style SSD which is much slower. If you weren’t aware but it sounds like you were.
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