SSDDRR Posted January 15, 2016 Share Posted January 15, 2016 Dear Sirs/Madams, I have two sets of paired Vengeance Pro 2400 (CMY16GX3M2A2400C11A), what results in 32 GB, 4 * 8 GB planks. Those four planks are set into Asus P8Z77-V Deluxe mainboard, which supports DDR3 up to 2800 MHz. Unfortunately, the mainboard does not explicitly list this Corsair memory on official support page in the latest DRAM QVL list from June of 2014. So by default my PC starts with just DDR3-1333 mode (667 MHz * 2). However, the mainboard supports XMP 1.3, so I switched to XMP mode in BIOS, set the speed to 2400 MHz (1200 * 2), 11-13-13-31 timings and raised memory voltage to 1.65V -- as recommended on the Corsair's official page for that. This is nominal speed for this memory, not some crazy overclocking, so I hoped it will work. But this alone was not enough because PC failed to start with those settings. Then I launched CPU-Z utility and it indicated that for 2400 MHz speeds there is value "44" to be set for additional timing called "tRC"; I could not find this specific timing in my BIOS, so I did not set it. CPU-Z also indicates another parameter to be set -- "Command Rate", which for 2400 MHz speeds shows value "1T". By default in my BIOS this parameter was set to "2", so I changed it to "1" (or maybe I should try to set it to "1T", but I could not; I do not know what "T" is, and why). This did not help either, PC still failed to start. Is there a way to force my mainboard to accept the memory? Maybe if I find this "tRC" timing and set its value to "44", it will help? How this "tRC" timing might be called/renamed in BIOS? Or maybe additional timings have to be set to specific values? The BIOS offers incredible number of secondary and tertiary timings, but I have no idea what to set there. CPU-Z does not show any more information, let alone Corsair page for this memory set. Thank you in advance. Link to comment Share on other sites More sharing options...
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