A. Bed Posted February 1, 2016 Share Posted February 1, 2016 Dear All, Dear Corsair Support! I cannot start PC with Asus z170 pro gaming and Corsair DDR4 CMK16GX4M2A2666C16 in XMP mode (by the way, I have only one profile in Bios...Corsair says that it should be 2 profiles. I wonder why I have only one). (2 modules, 16G in total) It goes black screen and then after several attempts it writes that BIOS overclocking failed... I was reading in the in another thread that this happen with 3200 memory I have installed latest BIOS - 1105 still its now working.... I was reading that you suggest to enter the timings manually Can you please write in very detail form where and what I have to write.... Which voltage I should put? Do I have a defective RAM? In 2133 it seems to be stable... Link to comment Share on other sites More sharing options...
c-attack Posted February 1, 2016 Share Posted February 1, 2016 I am not sure every kit has dual XMP profiles and I don't see a list to verify that information. However, it is possible your specific kit does not. The XMP2 profile would likely be for 2800 and it would need very relaxed timings given the XMP1 settings. On the E-Z bios screen, it would appear on left in the XMP drop down menu. It is common for DDR4 memory not to boot up with the XMP preset. It doesn't automatically mean there is an issue with the memory. To manually set the memory timings, go into the BIOS, hit F7 to go to the Advanced BIOS. Second column from the left is AI Tweaker. Scroll down a little bit until you see the DRAM Frequency setting. In the drop down menu select 2666. Just below that is the DRAM timing sub-menu. Hit enter and it will bring up an additional page. At the top of the page enter in the first 4 primary timings from your XMP kit. These are 16-18-18-35. DRAM CAS# Latency = 16 DRAM RAS# to CAS# Delay = 18 DRAM RAS# PRE Time = 18 DRAM RAS# ACT Time = 35 Leave all the other settings on auto and go back to the top to return to prior menu. Scroll down a little further in the AI Tweaker column until you fin the DRAM voltage setting. If left to AUTO, Asus will apply a pre-determined value based on your speed, and a very high one at that. You want to manually enter the XMP voltage of 1.20v. If you want be a little on the safe side, you could try 1.25v to cover any oddities in the boot sequence, but the kit is supposed to work at 1.20v and these timings. This should be a relatively easy set of timings to boot. I am a little surprised there it won't. http://i0.wp.com/www.eteknix.com/wp-content/uploads/2015/07/150731173001.jpg?w=800 Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 I am not sure every kit has dual XMP profiles and I don't see a list to verify that information. However, it is possible your specific kit does not. The XMP2 profile would likely be for 2800 and it would need very relaxed timings given the XMP1 settings. On the E-Z bios screen, it would appear on left in the XMP drop down menu. It is common for DDR4 memory not to boot up with the XMP preset. It doesn't automatically mean there is an issue with the memory. To manually set the memory timings, go into the BIOS, hit F7 to go to the Advanced BIOS. Second column from the left is AI Tweaker. Scroll down a little bit until you see the DRAM Frequency setting. In the drop down menu select 2666. Just below that is the DRAM timing sub-menu. Hit enter and it will bring up an additional page. At the top of the page enter in the first 4 primary timings from your XMP kit. These are 16-18-18-35. DRAM CAS# Latency = 16 DRAM RAS# to CAS# Delay = 18 DRAM RAS# PRE Time = 18 DRAM RAS# ACT Time = 35 Leave all the other settings on auto and go back to the top to return to prior menu. Scroll down a little further in the AI Tweaker column until you fin the DRAM voltage setting. If left to AUTO, Asus will apply a pre-determined value based on your speed, and a very high one at that. You want to manually enter the XMP voltage of 1.20v. If you want be a little on the safe side, you could try 1.25v to cover any oddities in the boot sequence, but the kit is supposed to work at 1.20v and these timings. This should be a relatively easy set of timings to boot. I am a little surprised there it won't. http://i0.wp.com/www.eteknix.com/wp-content/uploads/2015/07/150731173001.jpg?w=800 Ohhhh Thanks a lot. As soon as I will return from work I will try to do what you describe... At the same time I can overclock 6600k CPU? Right? I mean RAM manual timing entering wont conflict with overclocking CPU? Should I choose in the beginning in AI Tweaker menu XMP overclocking profile and then say "No" to adjust things manually? Should I choose any TPU settings? Thanks. Link to comment Share on other sites More sharing options...
c-attack Posted February 1, 2016 Share Posted February 1, 2016 No, I didn't intend to highlight the TPU setting in the picture, but I am not on your platform so I needed to scavenge images from the web. The TPU I and II are preset CPU overclocks, much in the same way the XMP is an overclock for the memory. You can use these to overclock your CPU, but I am not familiar with the preset values for your board. Technically, the XMP setting is only guaranteed to work at the default CPU settings. However, you should be able to run a moderate RAM and CPU overclock without too much difficulty. Skylake isn't quite so hampered like the prior Haswell series when it comes to sharing resources. At the very top of the AI Tweaker Menu, select Manual. Do not use the XMP setting there unless you are trying to overclock with the XMP preset active. Enabling that XMP setting in Tweaker menu will cause a number of other values to change and many of these values (like DRAM voltage) are a little too high. For testing purposes, it would be better to leave the CPU at it's default speed while you overclock the memory. After it's proven to boot reliably, then you can bump up the CPU speed again. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 clear, thanks, I let you know! Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 I'm sitting in front of my pc in BIOS I need your help: I have: dram latency dram delay Dram act time but I dont see pre time... Pls. see the picture of my Bios. I'm very sorry for bad quality of the picture. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 put everything as you told me except pre time (didnt find). voltage 1.2 Didnt help. After several attempts to start =received over clocking failed. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 So I have increased Dram voltage up to 1.28v Now it boots stable, but when I start the prime 95 it instantly finds errors and stops. I do attach a picture of the desktop. 5 minutes after: I have reached 1.31 The same problem. Prime 95 stop working because of error just after the start. Its strange - nevertheless I'm changing the dram voltage in Bios - in CPUz in SPD tab it always shows - 1.200 v Pls. see the picture attached. Link to comment Share on other sites More sharing options...
c-attack Posted February 1, 2016 Share Posted February 1, 2016 Sorry, it seems Asus is calculating the Precharge (tRP) automatically and has removed it from the timing control. It will calculate the necessary value based on the other timings. You don't need to enter it. You beat me to the next step, which would to increase the voltage to rule out inconsistencies in the motherboard voltage control. It does boot, but obviously the errors are problematic. I am assuming you are still at the stock CPU speed (40x100). If you are still able to get to the desktop, you can try and run HCi memtest. It works a little differently from the old Mem86+ and you run it as an application from the Windows. You only can allocate so much memory to each instance. You can open as many as 8 instances. Try adding windows at 2028k for each. 6 windows should take most of your 12-14GB available. Try for 200% passes, but I suspect you may not get very far. If the errors start piling up, you can stop. Otherwise it should be able to run through in 30-40 min. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 Is possible that this happen because I'm using window 7 ultimate SP1? Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 I return to the voltage 1.20. Now Windows boots even on this voltage. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 Yes, I am at the stock speed. I have just only changed in Bios the things you told me to change. Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 So you suppose Prime 95 is not enough to understand that memory unstable, HCi memtest will tell us something else? Link to comment Share on other sites More sharing options...
A. Bed Posted February 1, 2016 Author Share Posted February 1, 2016 By the way I have to underline that I totaly stable running the Prime 95 with my memory stock 2133 settings. Does it says that memory is ok and not defective? Link to comment Share on other sites More sharing options...
c-attack Posted February 1, 2016 Share Posted February 1, 2016 Yes, that is a strong indicator there is a problem. I've sent a personal message with possible options. That tab on CPU-Z only reports the default values encoded onto the memory module. It is not an actual reading of the current state. It shows the various JEDEC standard timings for 2133 and the pre-defined XMP profile. All of those are required to be written on the memory module, but they do not reflect your current settings. Link to comment Share on other sites More sharing options...
A. Bed Posted February 2, 2016 Author Share Posted February 2, 2016 Can I go with this one? This Ram is in QVL.... If it 4 modules instead of 2 it is not worse? 4 modules can work in dual mode? Right? CMK16GX4M4A2666C16 The one you proposed is not QVL by asus... Link to comment Share on other sites More sharing options...
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