I have both of these products and but do not know which cables go to which PSU. I know that most fully modular PSU are compatible with each other but I want to make sure. I tried using the EVGA website but I cannot understand the page they show you to check compatibility. Any help would be appreciated. Thank you.

Yes, these cables are compatible.
 
"550 GA cables compatible with EVGA Supernova 650 G5 and vice versa"

EVGATech_ChrisB
Yes, these cables are compatible.
 
"550 GA cables compatible with EVGA Supernova 650 G5 and vice versa"

Just to be clear a supernova 550 GA is compatible. Sorry for being bothersome I just want to make sure. I heard a rumor that some sata cable pinouts changed and weren't documented does that affect these PSU

The cables were not changed on these units.
 
The following PSU models use the same cable layout. - B3/B5/G2/G3/G5/G6/G7/GA/GM/GP/P2/P3/P5/P6/PP/T2
 

Anthonyblue100

EVGATech_ChrisB
Yes, these cables are compatible.
 
"550 GA cables compatible with EVGA Supernova 650 G5 and vice versa"

Just to be clear a supernova 550 GA is compatible. Sorry for being bothersome I just want to make sure. I heard a rumor that some sata cable pinouts changed and weren't documented does that affect these PSU

EVGATech_ChrisB
The cables were not changed on these units.
 
The following PSU models use the same cable layout. - 
 

Anthonyblue100

EVGATech_ChrisB
Yes, these cables are compatible.
 
"550 GA cables compatible with EVGA Supernova 650 G5 and vice versa"

Just to be clear a supernova 550 GA is compatible. Sorry for being bothersome I just want to make sure. I heard a rumor that some sata cable pinouts changed and weren't documented does that affect these PSU

Thank you so much! I really appreciate your help!