Using the
ATX Wiki as a guide and from what I can see from your pictures I'd say:
Picture 1
ATX12V 1.0 (or later but not 2.0) - Due to the 20pin and extra 4pin power connectors, although I don't recognise the one 6pin connector , but being Dell might be proprietary
Picture 2
ATX12V 2.0 (or later) - As after 2.0 the power supply is required to include a Serial ATA power cable, which are visible in the picture, and appears to have the 20pin + 4pin (24pin) power connector.
*EDIT*
Looking at the picture again appears to have a 6pin PCIe connector (if that's what the black 6 pin connector next to the 4pin power connector is) which would make
Picture 2 ATX12V v2.1 as 2.0 didn't have the 6pin PCIe connector and 2.2 has an 8 pin PCIe connector.
All according to the Wiki.
*EDIT2*
The info sheet for the
Coolermaster RP-500-PCAP (Picture 2) says its:
That would be my best guess at answering your question.