The only downside was that there were blue screens again and again in connection with an ASUS P5B-Plus motherboard. Until the cause of could be identified, some time went by, even if other users also complained about such problems. Solution: AUTO setting in the BIOS of the P5B-Plus RAM voltage manually (1.8 volts) to 2.1 volts. As far as I know, Corsair guarantees even under these conditions continue lifetime warranty.
Would have been due to low voltage on certain boards noted from the outset to potential incompatibilities, there would have been 5 star and not only. 4
The price is in any case, considering the performance of these modules, is more than satisfactory.