Solved

DRAM frequency not correct. CPU-Z showing 1199.8mhz on 3000mhz DDR4 (2x8) sticks

Per the title.. spent an hour or so looking thru similar threads. Benchmarks and BIOS keeps showing 2400mhz ram, but clearly reading the sticks as 3000mhz.

Timing/voltage looks right and I turned on XMP in the BIOS.

DRAM speed only shows 1199.8mhz on the Memory tab, but then SPD tab shows 1499mhz. So is the XMP profile working or not?

I'm only questioning it because the benchmark i ran showed my memory as 2400mhz also and a junk score.

Mobo is an MSI X99S Gaming 7.

Screenshots below.

http://imgur.com/hXIYneQ

http://imgur.com/2Q9ctz9
Reply to ammo777
15 answers Last reply Best Answer
More about dram frequency correct cpu showing 1199 8mhz 3000mhz ddr4 2x8 sticks
  1. SPD is what the manufacturer writes on the ram chips. Could be anything. Your RAM is running at 2400 Mhz. 1199.8*2 =2400 Mhz, which is the first D in DDR that stands for double.

    What CPU do you have?
    Reply to Andy Chow
  2. Andy Chow said:
    SPD is what the manufacturer writes on the ram chips. Could be anything. Your RAM is running at 2400 Mhz. 1199.8*2 =2400 Mhz, which is the first D in DDR that stands for double.

    What CPU do you have?


    Ok, that's what I thought..

    CPU is i7-5820K
    Reply to ammo777
  3. Use this command in cmd It'll show your ram current speed

    -wmic memorychip get speed
    Reply to sahak81
  4. sahak81 said:
    Use this command in cmd It'll show your ram current speed

    -wmic memorychip get speed


    "'-wmic' is not recognized as an internal or external command, operable program or batch file."

    Did a quick google search and doesn't need the "-". wmic memorychip get speed came up as
    "Speed
    3000
    3000"
    Reply to ammo777
  5. Best answer
    It's running at 2400. The spd tab just shows different profiles but doesn't say if it's on xmp. It may not even show all profiles. There maybe multiple xmp so make sure you selected the one for 3000.
    Reply to k1114
  6. k1114 said:
    It's running at 2400. The spd tab just shows different profiles but doesn't say if it's on xmp. It may not even show all profiles. There maybe multiple xmp so make sure you selected the one for 3000.


    Ok, so in the BIOS I need to look for XMP profiles. Thought I only saw the 1 profile, if that's the case do i just set the timing manually for 3000mhz?
    Reply to ammo777
  7. ammo777 said:
    sahak81 said:
    Use this command in cmd It'll show your ram current speed

    -wmic memorychip get speed


    "'-wmic' is not recognized as an internal or external command, operable program or batch file."

    Did a quick google search and doesn't need the "-". wmic memorychip get speed came up as
    "Speed
    3000
    3000"




    I mean without "-" sry my bad, this is your dimms and correct speed.
    Reply to sahak81
  8. Here's what Task Manager shows also.

    http://imgur.com/L5CAreH
    Reply to ammo777
  9. The whole point of xmp is so you don't have to set anything manually. You can of course set it manually and not use xmp.

    Task manager is not reliable in showing accurate speeds.
    Reply to k1114
  10. Seems to be fixed now. The BIOS had a "Game Boost" option selected and I couldnt have XMP on with it at the same time. I did have an issue where it no longer wanted to boot, but cleared CMOS, went into BIOS a cpl times to fix a setting and voila... CPU-Z now shows DRAM freq at 1499.6-1500 and correct timing. Thx for the help!
    Reply to ammo777
  11. Cool. Per specs, your CPU only supports RAM up to 2133Mhz, but since it's a K and the right generation, they usually overclock easily.
    Reply to Andy Chow
  12. The specs are stock speeds not max speeds. Also you don't need a k cpu to have ram that is above stock speeds. It's not the same as ocing the cpu.
    Reply to k1114
  13. k1114 said:
    The specs are stock speeds not max speeds. Also you don't need a k cpu to have ram that is above stock speeds. It's not the same as ocing the cpu.


    You are technically overclocking the memory controller of the CPU, no?
    Reply to Andy Chow
  14. Both ram and imc. There is separate ram and vtt voltages. But ram multi isn't something that gets locked which is why you don't need a k cpu to oc ram. You do need a mobo that can oc ram though. You'll also notice people can use 3000mhz without touching vtt and just raising ram voltage which is going to be higher than stock.
    Reply to k1114
  15. These sticks should be able to run at DDR4 3333 MHz with the same primary timings 15-17-17-35 with a bit of a bump in voltages. I have 32GB with same rating as yours and I suspect the same chips from the default tRFC value of 525 at 3000 MHz. They are running stable once I bumped the voltages up a little:
    DRAM voltage: 1.39v (Anything below 1.412v is perfectly safe for 24/7 use on Intel)
    VCCSA voltage: 1.2v (possibly can lower this further, depends on how good your IMC is)
    VCCIO voltage: 1.21v (possibly can lower this further, depends on how good your IMC is)

    Also managed to squeeze quite a bit extra performance out of these dimms by changing some timings, the most significant ones as follows:
    tRFC:489
    tREFI:65000
    tRDRDsg:6

    Good luck
    Reply to uklio
Ask a new question Answer

Read More

DRAM Frequency BIOS CPUs DDR4