Yes, the PCI-E 6-pin power adaptor for connecting 2 molex into 6pin PCI-E will work sufficiently for the cards mentioned if your 450W does not have a proper 6-pin PCI-E
Yes, the PCI-E 6-pin power adaptor for connecting 2 molex into 6pin PCI-E will work sufficiently for the cards mentioned if your 450W does not have a proper 6-pin PCI-E