lazers Posted March 23, 2017 Share Posted March 23, 2017 Can any one help me out. RAM is running at 2133. I enabled XML in BIOS and now BIOS shows correct RAM configuration including voltage and everything. However, Windows (Task Manager, WMIC and CPU-Z) still show it as 2133. Please help. Thanks Link to comment Share on other sites More sharing options...
emissary42 Posted March 23, 2017 Share Posted March 23, 2017 Check what CPU-Z > memory tab shows for frequency. It should be 1500MHz for DDR4-3000 (because of double data rate). Link to comment Share on other sites More sharing options...
lazers Posted March 23, 2017 Author Share Posted March 23, 2017 check what cpu-z > memory tab shows for frequency. It should be 1500mhz for ddr4-3000 (because of double data rate). Link to comment Share on other sites More sharing options...
red-ray Posted March 23, 2017 Share Posted March 23, 2017 CPUZ reports the JEDEC rather than the XMP bandwidth. The DIMMs are running at the DDR4-3000 rate and all is as it should be :biggrin:. I expect the 2133 that Windows reports comes from the SMBIOS/DMI data and is also JEDEC rather than XMP. Link to comment Share on other sites More sharing options...
lazers Posted March 23, 2017 Author Share Posted March 23, 2017 CPUZ reports the JEDEC rather than the XMP bandwidth. The DIMMs are running at the DDR4-3000 rate and all is as it should be :biggrin:. I expect the 2133 that Windows reports comes from the SMBIOS/DMI data and is also JEDEC rather than XMP. Oh, ok. Makes sense. Actually these wmic and taskmanager were very confusing. Thanks :biggrin: Link to comment Share on other sites More sharing options...
emissary42 Posted March 23, 2017 Share Posted March 23, 2017 NB frequency is the CPU_NB or uncore speed and has nothing to do with memory. DRAM frequency is what you are looking for and 1500MHz is exactly what it should be for DDR4-3000. So all is good. The max bandwidth ignores Intel Extreme Memory profiles (XMP) and defaults to the fastest available standard profile, so that's why it gets reported as DDR4-2133. Link to comment Share on other sites More sharing options...
red-ray Posted March 23, 2017 Share Posted March 23, 2017 The max bandwidth ignores Intel Extreme Memory profiles (XMP) and defaults to the fastest available standard profile, so that's why it gets reported as DDR4-2133. But CPUZ reports it as DDR4-2132, not DDR4-2133. How can this be correct? Link to comment Share on other sites More sharing options...
emissary42 Posted March 25, 2017 Share Posted March 25, 2017 Probably a rounding error because of BCLK drifting slightly below 1000MHz during initialisation, it's the same with the XMP and probably CPU-freq as well (happens on a lot of boards). Link to comment Share on other sites More sharing options...
red-ray Posted March 25, 2017 Share Posted March 25, 2017 Probably a rounding error because of BCLK drifting slightly below 1000MHz during initialisation, it's the same with the XMP and probably CPU-freq as well (happens on a lot of boards). Incorrect. The SPD data is read from the DIMMs and the BCLCK has no effect at all on this. When I mentioned this to Franck he asked me how I got the correct numbers and he is planning to update his code to do the same. Link to comment Share on other sites More sharing options...
NimoStar Posted July 24, 2018 Share Posted July 24, 2018 Hello. I'm having the very same problem... except that mine is real. The Corsair memory is running as ddr4-2133 when it should be ddr4-2400 It is paired with a Kingston ddr4-2400 which works at the correct speed, but also slowing it down due to dual channel requirements. As you can see from the model and other settings this Corsair memory is suppossed to have a 2400 mhz clock! photo sharing Link to comment Share on other sites More sharing options...
DevBiker Posted July 24, 2018 Share Posted July 24, 2018 Mixing RAM is no bueno. Look at the other timings for 2400Mhz ... they don't match. You're lucky to boot at all as they don't have any common settings. It's always been recommended not to mix RAM but if you do, make sure that the timings match exactly. With DDR3 and earlier, you could usually get away with it a bit. DDR4 is particularly persnickety when you mix timings. Link to comment Share on other sites More sharing options...
Corsair Employee Corsair Art Posted July 24, 2018 Corsair Employee Share Posted July 24, 2018 Hello. I'm having the very same problem... except that mine is real. The Corsair memory is running as ddr4-2133 when it should be ddr4-2400 It is paired with a Kingston ddr4-2400 which works at the correct speed, but also slowing it down due to dual channel requirements. As you can see from the model and other settings this Corsair memory is suppossed to have a 2400 mhz clock! photo sharing Use only one or the other module and you should be fine. -Art Link to comment Share on other sites More sharing options...
tiessar Posted July 24, 2018 Share Posted July 24, 2018 Just disable XMP and set your memory to 2400Mhz, it should run at 2400Mhz CL 17 or CL18 automatically. If not set your primary timings to 17-17-17-39 CR2 Link to comment Share on other sites More sharing options...
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