01jkgaddi :
Is " MSI GT 1030 2gb LP OC " Compatible to my " HP DC7900 Small form factor "
Specs : DDR2 motherboard , PCIe X16
Just make sure that you have a PCIe X16 slot
The HP DC7900 SFF is compatible with LP graphics card with height = 2.5 in., length = 6.6 in
The MSI GT 1030 is a little taller 2.7 in. but you could measure the space on your case, it might fit.