HP verlangt weiter "DDR3 SDRAM DIMM must also support CAS latency 7 DDR3 1066 MHz (7-7-7 timing) and CAS latency 9 DDR3 1333 Mhz (9-9-9 timing) and contain mandatory JEDEC SPD information? Welches Produkt passt denn da???
I found not that much about the mainboard in this Dell, but it should work, as the specs are what your board can handle. Give it a try. Just to be honest, you can't be sure until you tried.
I have an HP Pavilion HPE h8-1010ch desktop PC with an Intel H67 chipset. In addition to the 2 x 4 GB of the Hynix brand already pre-installed, 2 x 4 GB of the Kingsten brand (KVR13N9S8K2/8, DDR3-1333, DIMM 240) were inserted into the remaining 2 slots. The PC works perfectly and without any faults.
From the specifications, they should fit.
But note how many GB your board can process max. Don't buy e.g. 24Gb (the set here 3x) but your board can only handle max 16Gb.
In another question asked about these modules, the user "panciera" had also stated that he had not been able to get them to work in an HP Elite, but had been able to get them to work in another PC.
It is quite possible that HP only allows specific modules in some models of their devices. Try running the modules only with 2x4GB instead of 4x4GB, just to see if the PC starts.