I take it you've added the 1050 to graphicscards.sgr and confirmed it was done correctly? (You'd know when you saw a value next to the card's name in deviceconfig.log.) If so, open graphicsrules.sgr, ctrl-F to search for 8800, and you'll see this:
elseif (match("${cardName}", "*8800*") or match("${cardName}", "*9500*") etc.
(this is the start of the list of Nvidia cards rated uber by the game)
change the 8800 to GTX 1050, assuming you named your card something like GeForce GTX 1050. Don't touch the rest of the punctuation, not even the asterisks. Save, quit, launch the game to test, and you should now see a in deviceconfig.
To make the game recognize your VRAM, look for these lines, right at the top of graphicsrules.sgr:
if ($textureMemory == 0)
seti textureMemory 32
setb textureMemorySizeOK false
Change the 32 to a 1024 and put a # and a space immediately in front of setb; save, quit, launch the game, and check the texture memory value in deviceconfig. The value is listed below the other info about your graphics card, and texture memory should now be 1024 MB.
