The 690 is big enough to accomodate two of those 5770's.. Your main concern should be on cooling and the 690 does not disappoints on that also.. Although i think the cooling on the 922 is better.. Nevertheless, given a choice between those two, i'd select the 690 because of its more neater looks.. The 922 wont even be my second option.. For that I'll reserve the antec 902..