DDR4 DRAM not correct

[Sfinewine]

i have laptop dual channel with 3200mhz speed ram, with different module manufacture,first is 8gb 3200mhz ram module manufacture micron technology which running fine before, then i adding 8gb 3200mhz ram with module manufacture SK hynix,the problem is,when am using cpu-z to test, DRAM frequency only 665mhz instead 1600mhz how it should be. Anyone have any solution with this problem?

[Tan3l6]

Maybe there's a XMP option in BIOS.

Also the 665.1Mhz is ~1333Mhz double data rate. Strange speed to default to, though.

[fotras]

seem sus ram, maybe because u have different ram manufacture, ram speed cut to 2667,and 665x4=2660 because of ddr4. 

[Jurrunio]

You sure the Hynix kit's part number is HMT81GU6AFR8N-UH according to the sticker on the module? Search results return a 2400MHz stick.

 

But even if it is capable at 3200MHz, the timings may be different and the laptop will run at the minimum frequency possible if there's no common frequency and timings (i.e. SPD profile) on the two sticks. The Micron stick looks normal rated for 3200 22-22-22 and 2666 19-19-19, so you should swap out the Hynix.

 

48 minutes ago, fotras said:

seem sus ram, maybe because u have different ram manufacture, ram speed cut to 2667,and 665x4=2660 because of ddr4. 

No, DDR4 is still DDR. You only multiply by 4 on QDR memory.

[Sfinewine]

On 8/12/2021 at 3:04 PM, Jurrunio said:

You sure the Hynix kit's part number is HMT81GU6AFR8N-UH according to the sticker on the module? Search results return a 2400MHz stick.

 

But even if it is capable at 3200MHz, the timings may be different and the laptop will run at the minimum frequency possible if there's no common frequency and timings (i.e. SPD profile) on the two sticks. The Micron stick looks normal rated for 3200 22-22-22 and 2666 19-19-19, so you should swap out the Hynix.

 

No, DDR4 is still DDR. You only multiply by 4 on QDR memory.

thank you for your answer,its help me, will this ram affect laptop hardware or just cut my ram speed to 2666mhz?

[Jurrunio]

56 minutes ago, Sfinewine said:

will this ram affect laptop hardware or just cut my ram speed to 2666mhz?

It cuts memory frequency to 1333MHz (666.66 * 2), yes it hurts performance. But no, it wont cut the laptop's lifespan short.

[Sfinewine]

On 8/14/2021 at 12:24 AM, Jurrunio said:

It cuts memory frequency to 1333MHz (666.66 * 2), yes it hurts performance. But no, it wont cut the laptop's lifespan short.

so the conclusion is,hynix ram that i bought before was a trash,and i need to change it with others ram?i surprised this ram cut my ram performance to 1333mhz,but in task manager it say 2666mhz,am confuse.

[Jurrunio]

3 hours ago, Sfinewine said:

so the conclusion is,hynix ram that i bought before was a trash,and i need to change it with others ram?i surprised this ram cut my ram performance to 1333mhz,but in task manager it say 2666mhz,am confuse.

If CPU-Z says 666, you're running 1333. If it says 1333, you're running 2666

[Mark Kaine]

6 hours ago, Sfinewine said:

this ram cut my ram performance to 1333mhz,but in task manager it say 2666mhz,am confuse.

DDR stands for *double* data rate.

 

 

[Sfinewine]

7 hours ago, Mark Kaine said:

DDR stands for *double* data rate.

 

 

in cpu-z dram is 665mhz,which mean am only have 1333mhz speed,but in task manager i have 2666mhz.