Umut Posted October 19, 2013 Share Posted October 19, 2013 Hi, I'm currently using it with 1.640v dram voltage. I can only select 1866 and 2133mhz xmp profiles from bios, there's no XMP2000mhz between them. But even at XMP-1866mhz, it's not very stable(despite it's 1.65v in xmp), i'm getting ctd errors at games etc. with memory write failures.(error code:c0000005) There's no errors at default 1066mhz. Do I have to quit using xmp and manually enter voltage values in order to have more stable rams ? What are the exact voltage values for dominator gt 2000mhz ? It's base voltage is 1.65v at the sticker. But what about other settings at my motherboard ? I've added a bios screen from dram section below. Rams are 2x4gb sticks of corsair dominator gt 2000mhz. (8g set of 2sticks with special dominator gt cooler included) Motherboard is Gigabyte z68x-ud7 extreme and cpu is i7 2600k.. DRAM VOLTAGE SETTINGS IN BIOS http://abload.de/img/1voltgqchu.jpg 1.65 can't be selected manually it goes like 1.64-1.66.... so i've selected 1.64. Help me with vref and other values for this model please. XMP PROFILE SETTINGS http://abload.de/img/2xmpundnk.jpg As you see it recognizes 2000mhz rams as 1998mhz but there's no ready-to-use xmp profile for 2000mhz rams. So i use 1866mhz XMP. Please help me about voltages in the first section of my bios. (DRAM VOLTAGE SETTINGS) I need more infos about dram vref, termination, channel vrefs etc. What values should I enter to these ? Link to comment Share on other sites More sharing options...
peanutz94 Posted October 19, 2013 Share Posted October 19, 2013 As you see it recognizes 2000mhz rams as 1998mhz but there's no ready-to-use xmp profile for 2000mhz rams. So i use 1866mhz XMP. Make sure your BIOS is up to date if it isn't already, then enable the XMP profile and post a screenshot of CPUz's memory and SPD tabs please. But even at XMP-1866mhz, it's not very stable(despite it's 1.65v in xmp), i'm getting ctd errors at games etc It's very possible you just have a CPU that doesn't like to be overclocked. But have you tested the memory with memtest just to be sure it's not a failing module. 2000mhz is kind of an odd ball frequency. They were good for pre sandy-bridge systems but don't do so well with the newer CPU's. Hence the 1866-2133mhz profiles. If the memory tests out fine and it isn't stable no matter the BIOS adjustments. Really DIMM and VTT are at max values already with the profile 1 active. You could try setting thenm .1.66 and maybe even add a tick or two of CPU voltage, but if that doesn't work in this case I would say try a newer 1866 or 2133mhz kit. You should be stable at 1866mhz pretty easily. I need more infos about dram vref, termination, channel vrefs etc. What values should I enter to these ? Nothing! All those are best left on auto for the MB to adjust accordingly. As a matter of fact Corsair does not publish those settings because they are irrelevant. DIMM voltage, timings and memory controller voltage is all you should need to set . You can try setting them manually too just to see if it is any more stable. Just use the same values that are printed on the sticks. Link to comment Share on other sites More sharing options...
Umut Posted October 20, 2013 Author Share Posted October 20, 2013 Yes, I've run memtest86 for about 5 hours overnight there were 0 errors at XMP-1866mhz. But it's not very stable under the os with these settings, sometimes getting write errors, PAGE_FAULT_IN_NONPAGED_AREA bluescreens etc. in games. Ocz screenshots are these: http://abload.de/img/2memtabk2c3f.jpg http://abload.de/img/2spdtabpliad.jpg Link to comment Share on other sites More sharing options...
peanutz94 Posted October 20, 2013 Share Posted October 20, 2013 Okay looking at your system specs you show a CPU OC of 4.5ghz. Are you trying to run the memory at 1866 along with the CPU OC? If so you may have to sacrifice some of your CPU OC to get higher memory freqs. At least in appearance it looks as if your going about this a bit backwards. Really, you should start out at defaults and find your highest memory OC first, then start raising your CPU OC. There is nothing wrong with starting out with CPU first, you just may not reach the higher memory freqs. In all honesty, your going to get a bigger performance boon from a higher CPU OC than you would higher memory OC anyway. Sooo,back to the problem at hand. One last thing to try is raising system agent voltage a tick or two . But if that doesn't get you stable at 1866mhz, then you have two option...One, drop the CPU OC some and see what happens..2, I would really consider a kit that was meant to run on that board. Your MB doesn't support 2000mhz and could very well be why your having trouble getting stable. Support for DDR3 2133/1866/1600/1333/1066 MHz memory modules http://www.gigabyte.com/products/product-page.aspx?pid=3847#sp Link to comment Share on other sites More sharing options...
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