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DRAM Frequency reporting just under 1200 on two 2666Mhz ram modules on Omen 15-dc1088nr

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HP Omen 15-dc1088nr
Microsoft Windows 10 (64-bit)

Hi!

My laptop was configured with a 16gb 2666Mhz ram module, and I decided to add in another module with the same frequency and size. It seems to be running at 2400Mhz and I wanted to know why that was.Capture3.PNGCapture2.PNGCapture.PNG

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Hello @Seiche 

 

When you matched the timings, did you use CPU-Z and read all the timings from the original stick before purchasing the Samsung stick? If they do not match exactly, you will have issues like down clocking and a failure to run in dual channel mode. Looking at the SPD tab, they don't match.

If you did in fact match the total timings, then those two sticks just aren't going to play well together. This is why I always suggest purchasing a matched pair.

 

Like this example.....

mem timings cpuz.JPG

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Hi @Photoray002,

 

Thanks for your input! Actually, the Samsung was the original module installed on the system. I just flipped them in the event that I replaced the stock one with a faster one later on. I got a Kingston module that was a bit faster, thinking that it'd just slow down to match the latency on the Samsung. I'm wondering why it's hitting 2400 performance when both are 2666, though.

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Ya either way, samsung or kingston wont matter.  But even though both equal 2666, the timings are not the same and thus the system will down clock them as a whole and you get that lower number. They wont run in dual channel either.

 

You mentioned getting a faster set later? Know that if you intend on going over 2666 Mhz, the motherboard will still down clock them and most likely, it will still hit 2400 in the end. HPs cannot run overclocked ram and there is no settings in the bios to change that. The bios is locked.

 

I've also seen various name brands not work at the rated speeds of 2666 because they had a lower SPD rating at boot. If they do, the HP motherboard might keep them running at that lower speed.

The only sure way I have found to go around this, is to use Crucial brand ram that their memory finder shows as compatible. If theirs doesn't work, they offer a 100% money back guarantee.

 

Here is the link if you're interested... https://www.crucial.com/usa/en/compatible-upgrade-for/HP-Compaq/hp-omen-15-dc1088nr

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Huh. CPU-Z says they're running on dual channel, though.(In the screenshot!) Strange, that. Oh, I meant getting a better 2666Mhz module with better latencies than the Samsung but with the same frequencies. What's strange is even if they're not running dual channel(though they seem to be), they should both still be 2666Mhz as the Kingston has a baseline of 2666Mhz unlike the Ballistix that requires XMP to hit 2666Mhz. The device came with the 2666Mhz module so I figured that that was what the motherboard was configured for.

 

Once again, thanks for taking the time to discuss this with me.

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No problem, hope it helped.

 

Good luck.

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