Mysterious Behaviour, New High Spec System. Tags: Motherboards Memory Overclocking Last response: January 8, 2012 5:22 PM in Overclocking Share SeymourCray January 8, 2012 2:31:08 PM I just built my new developer workstation, but I'm confused about a few things, here is kit summary first: Mobo = ASUS Rampage IV Extreme BF3 X79 CPU = Core i7 3960x 3.30 GHz Memory = G.SKILL Ripjaws X Series 32GB (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL10Q-32GBZL (I have 64GB) Video = EVGA GeForce GTX 580 First issue is the BIOS sees/reports memory as being 1333 NOT 1866 as is written on memory packaging. Second issue, I haven't played much, but when I used the overclock BIOS menu, each of the basic settings cause box to not boot, I can only get it to boot if I reset BIOS to defaults. Third, I tried to specify in BIOS that memory was 1866, but again it failed to boot and I had to reset CMOS. Other than this, so far it is superb machine, very fast indeed for my work (A complete rebuild of a large software product takes 9 seconds vs 50 seconds on earlier kit). But I paid for 1866 memory not 1333, what is wrong? all kit is high spec... Thx Cray. More about : mysterious behaviour high spec system SpadeM January 8, 2012 4:00:29 PM Run memtest at 1333 or whatever speed it boots to check if it's ok and of course set it to xmp profile in bios. anonymous1 a b V Motherboard a b } Memory a b K Overclocking January 8, 2012 4:06:37 PM is the BIOS set to the proper voltage? 1.5v Related resources New Conroe build strange behaviour - Forum Anyone like mysteries? Extremely erratic behaviour ! - Forum Mysterious High Pitched Screech When Idle - Forum Pro amps vs. consumer amps - Forum Erratic behaviour with desperation - Forum Can't find your answer ? Ask ! Get the answer thently a b V Motherboard a b } Memory a b K Overclocking January 8, 2012 4:11:58 PM First up have you updated to the newest bios version sometimes they fix issues like this? Thent SeymourCray January 8, 2012 4:54:55 PM thently said:First up have you updated to the newest bios version sometimes they fix issues like this? Thent Hi OK newest BIOS installed, box boots fine but again sees memory as PC3-10700 (667 MHz) and not PC3-14900 (933 MHz). CPU-Z reports this figure and BIOS when set to AUTO mode for memory config, also report DDR3-1333. The actual part number for the DIMM reported by CPU-Z is F3-14900CL10-8GBZL. (There may also be a bug in CPU-Z it reports only 5 of the 8 slots as populated, yet Windows does see all 64GB). What could cause this? does the BIOS not detect the specific characteristics of the installed RAM? Also voltage seems tobe 1.50v on the nose. Cray. anonymous1 a b V Motherboard a b } Memory a b K Overclocking January 8, 2012 5:22:07 PM I dont see your RAM on the ASUS Qualified Vendor List. SeymourCray January 8, 2012 5:22:57 PM SpadeM said:Run memtest at 1333 or whatever speed it boots to check if it's ok and of course set it to xmp profile in bios. OK, there was a BIOS setting that pertains to XMP, I enabled that and it reboots now fine as 1866 memory. Thx Cray Can't find your answer ? Ask ! Publish Related resources : ForumYANI: break mysterious force ForumMysterious mouse/keyboard lockup ForumA very unique and mysterious problem I'm facing. ForumGA-EX58-UD3R,,,and odd BIOs behaviour after OCing ForumWhats the difference in Memory of equal spec ? ForumMysterious pc problem ForumThe World's Most Mysterious Audio Problem ForumHigh FPS but choppy graphics on gaming system please help =/ ForumSN41G2 strange power up behaviour ForumUSP ForumShould I connect all my case fans to a PWM slot? ForumNew build fans ForumI5 2500k High Temps ForumNew Fan controller and reporting fan speeds Forum[Solved] Think my temps are too high More resources Read discussions in other Overclocking categories CPUs Motherboards Memory Chipsets Heatsinks Water Cooling Intel AMD !