Hell yeah.. Compustocx Germany, one of the biggest OEM suppliers for Apple Mac Pro's. This kit is rated for 2000 C9 at 1,65V - like the Gskill PI Black Kit (1600 C8), they carry Samsung HCF0 chips, which is why the 2 ram kits are a good match

SR-2 is stable as a rock at 4.3 - too bad I have to work or I'd start benching right away