The memory modules are delivered without heat spreader (heatsinks), so it is necessary to keep an eye on the RAM temperature during higher overclocking. Alternatively one can mount a passive or active memory cooler, which are available in different versions e.g. at our sponsors OC-Card.de or PC-Cooling.de. Crucial by the way grants lifelong warranty (Limited Lifetime Warranty) for the buyer. All information to manufacturer conditions are of course without guarantee by ocinside.de. Officially these Crucial modules are designed for the JEDEC standard voltage of 1.50 V for DDR3 modules. The manufacturer timings and latency can be easily reached on this voltage. By the way, the test modules were equipped with Micron D9JNM chips, whereby the assembly can vary however within production.

Here is a picture of the other Crucial modules side:

Not 4GB during booting, but only 3GB in the BIOS or operating system …

It can occur that the memory capacity is only indicated as approx. 3GB instead of the 4GB, because the 4GB DDR, DDR2 or DDR3 RAM size or any size with more than 2GB is still a case sui generis.Here at ocinside.de is a guide which contains among other things a table, how much RAM is supported by operating systems.