I am seeing many users add more than they need to for device properties, for example inserting card rom#, but chances are that was already working. for the performance fix you ONLY need the ATY,Type lines for at symbol 0-3 and the device_type line
most of other stuff is read correctly from card so the replacements are not needed unless you are spoofing device ID like XTXH then you need just the new Id, or you are inserting a custom name, usually again for XTXH cards.
EDIT: More testing, I found that these are best to add to fix performance and not have sleep issues
@0,name
@1,name
@2,name
@3,name
AAPL00,DualLink
device_type
before I only added @N values and that fixed performance but sleep had a tendency to be a little off and performance wasn't 100% with dual link set and evice type also set to correct ATY,typeforcard I can say performance is 100%, actually more than 100% since i'm betting setting duallink and proper device type is actually what fixed performance issues in general even pre 12.3. 180,000 geek bench scores now and even more consistent fps in WoW than 12.2.x without values, so 12.3 was a blessing in disguise in setting up peak performance of 6900XT
all the other values i still found are there without altering, so replacing them seems pointless. You might be able to edge a tiny bit more performance by the power management values but i found those also could mess with computer staying asleep.