September 17, 20178 yr Hey guys I have had 1600 mhz 2x8gb sticks Running fine with xmp mode I7 4790k stock 4ghz turbo 4.4 Now have 2400mhz Setting xmp mode pc wont boot into windows If i set optimise default It boots thou only 1333mhz How can i run my ram at 2400?? Asus vi extreme mobo z87 850w psu 2xtitan sc 6gb each sli Ssd etc etc Thanks Mike
September 17, 20178 yr Try increase CPU voltage a bit. Mine is set to 1.225v at 4.5Ghz (YMMV). I have same cpu and 32gb 2400 ddr3. Intel Core i9 13900K, NVidia RTX 4090 FE, Corsair Vengeance DDR5 64GB@6000MHz, Samsung 990 Pro 2TB NVMe M2, Asus OLED PG42 UQ
September 17, 20178 yr Author 6 minutes ago, xenonsk said: Try increase CPU voltage a bit. Mine is set to 1.225v at 4.5Ghz (YMMV). I have same cpu and 32gb 2400 ddr3. That maybe the case Will test Thanks
September 17, 20178 yr Commercial Member Why would increasing the CPU voltage do anything to the RAM? See if the RAM requires a higher (non-standard) voltage to run at 2400Mhz. Also, can you clock the RAM at 2133Mhz and see if it boots? Cheers! uke Luke Kolin I make simFDR, the most advanced flight data recorder for FSX, Prepar3D and X-Plane.
September 17, 20178 yr maybee the memory controller of your cpu is not able to run memory at 2400. another option is that your board is not compatible with your memory. did you check that? i had this issiue once. you can also try if your system boots with one ram module. brgds C. W. ,Ryzen 9 5950X @H2O , 32 GB RAM DDR4 3600 Mhz CL15 , Corsair MP600 Pro Watercooled 2 TB for P3D, Samsung SSD980 1 TB for Addons and Crucial MMX500, Red Devil Ultimate 6900 XT
September 17, 20178 yr check recomended voltage on the sticks 1.65v ? if you have 1.5v probly not boot. then you have another voltages dont rember vcca or someting that mobo was very good at mems , i was running 2800mhz c10 with a 4770k on that board. its was a some years ago good luck , shall not be any problems with 2400mhz think 99.9% of the haswell cpus did that http://
September 17, 20178 yr Author 4 hours ago, 331BK said: maybee the memory controller of your cpu is not able to run memory at 2400. another option is that your board is not compatible with your memory. did you check that? i had this issiue once. you can also try if your system boots with one ram module. brgds Mem controller please elobarate?
September 17, 20178 yr Author 2 hours ago, westman said: check recomended voltage on the sticks 1.65v ? if you have 1.5v probly not boot. then you have another voltages dont rember vcca or someting that mobo was very good at mems , i was running 2800mhz c10 with a 4770k on that board. its was a some years ago good luck , shall not be any problems with 2400mhz think 99.9% of the haswell cpus did that Mine is 1.65 v 11 13 13 31
September 17, 20178 yr You might have to manually configure the BIOS for the new memory (safer to do a manual config anyway). Greg
September 17, 20178 yr Author 12 minutes ago, lownslo said: You might have to manually configure the BIOS for the new memory (safer to do a manual config anyway). Greg How so? Im only a little computer savvy. Thanks Mike
September 17, 20178 yr I haven't checked your motherboard, but it may not have an XMP for your memory. If not, you'll have to configure the memory settings by hand in the BIOS. The upside is... fast mem XMP's for the Z87 motherboards sometimes did goofy (and bad) things to CPU settings (like increasing voltages). The safe bet on your Z87 board is to configure the memory yourself (which it seems you may have to do anyway for lack of an XMP). HTH, Greg
September 17, 20178 yr Author Just now, lownslo said: I haven't checked your motherboard, but it may not have an XMP for your memory. If not, you'll have to configure the memory settings by hand in the BIOS. The upside is... fast mem XMP's for the Z87 motherboards sometimes did goofy (and bad) things to CPU settings (like increasing voltages). The safe bet on your Z87 board is to configure the memory yourself (which it seems you may have to do anyway for lack of an XMP). HTH, Greg Hi greg It does have an xmp profile only 1 2400mhz Tried manually adding voltage and timings and same thing itll keep rebooting Perhaos cpu voltage does need to be raised?? Not infront of my pc atm but will try increaseing.the cpu voltage i have read in other forums Thanks Mike
September 18, 20178 yr Author Oh and my ram is seated in slots a1 and b1 2 red slots Lol.and the 2 black slots i dont know
September 18, 20178 yr This may sound like a silly question but how stable is your PSU in terms of voltage 850W is ok but if you intend OC always buy good quality at lest gold standard, unstable voltage will cause a reboot even when set correctly. Did you try ASUS AI 3 Suite to overclock it will find the limit you can go to. Raymond Fry.
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