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from all the reading i did on this, founders editions will fit the easiest but have airflow challenges. I can confirm that the XC3 will 1) fit length wise but critically 2) there is a good deal of clearance at the top. there is about 15mm of good clearance for a 2/2.2 slot card. i have my XC3's backplate flush with the mboard tray and it gets hot but i have my fans on a 40% cycle all the time so the card runs cool. HTHobviously - this is for A4-SFX, the H20 increases clearance at the top IIRC and the C4 is just bigger.
from all the reading i did on this, founders editions will fit the easiest but have airflow challenges. I can confirm that the XC3 will 1) fit length wise but critically 2) there is a good deal of clearance at the top. there is about 15mm of good clearance for a 2/2.2 slot card. i have my XC3's backplate flush with the mboard tray and it gets hot but i have my fans on a 40% cycle all the time so the card runs cool. HTH
obviously - this is for A4-SFX, the H20 increases clearance at the top IIRC and the C4 is just bigger.