[SOLVED] Ram only running at half capacity

Nov 22, 2020
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Hi!

I am not entirely new to the whole spec game, however, I recently started learned more in-depth about hardware and what combinations work there. Also in software, what's not a virus and what is etc. etc.

I have had this problem ever since I bought the motherboard I currently have installed, the RAM and CPU. I have 2x Corsair XMS3 8 GB (2 x 4GB) 1333 MHz CMX8GX3M2A1333C9 (I will include full spec-list below so you can easier help me figure this out.)

Now I know that the "2x4" means that there's essentially 2 RAM-sticks in 1 and this particular one has 2x 4GB sticks which makes the whole stick an 8gb stick. But my issue here is that the computer only detects half of each stick (4GB /stick), giving me 8GB RAM total, when I should have 16GB. I thought it was just one of the sticks being bad. But just now I opened the "performance" tab in Task Manager and found that it said on the far left edge: "slots used: 2 of 4". And if I hovered my cursor over it it said: "slot 2: 4,0 GB, 667MHz" and "slot 4: 4,0 GB, 667MHz". Now there is another interesting mystery. The RAM sticks each have 1333MHz of speed, but it only registers as (when I checked a system info software) 666.7MHz. I did a check-up on how much RAM my CPU but I couldn't find anything. I know that the stick has the performance profile XMP. And I googled that aswell on how to set that up, but when I got to the BIOS, it was already enabled.

So now begs the questions, do I keep searching for an answer? Do I give up and get a new computer? (Which I would love to not have to do since I'm a bit tight when it comes to money.) Do I get new RAM-sticks that doesn't use the "2x4" tag but just simply 8GB sticks?

As for the speclist I promised;


  • Motherboard: GIGABYTE GA-970-GAMING
  • CPU: AMD FX-8350 eight-core processor 4GHz (only using 6, maybe answer this question too on how to fully enjoy my CPU?)
  • GPU: GIGABYTE NVIDIA GeForce 1050 Ti OC Edition
  • RAM: 2x Corsair XMS3 8 GB (2 x 4GB) 1333 MHz CMX8GX3M2A1333C9
  • SSD1 (OS Drive): KINGSTON SA400S37120G
  • SSD2: Samsung SSD 860 QVO 1TB
  • HDD: WDC WD3200AAKS-00L9A0
  • PSU: Corsair TX650W
  • CPU cooler: stock (will change soon to Corsair H60 Liquid Cooler)
  • BIOS Version: F1
I'll also include some pictures here so you can see what it looks like in the Task Manager and Resource Monitor. I have also noticed recently that the idle memory usage is shooting up to over 40-50% when idle. Maybe that's a mystery worth solving too.
Pictures:

Resource Monitor (Memory Usage)
Task Manager > Performance > CPU


If there is any questions as to what else is needed to come up with an answer and I haven't included it here, just reply and I'll get back you as soon as possible!

Thank you for taking the time to read! :)
 
Solution
Thanks. So you can see each dimm slot has 4GB modules each running in dual channel and at a frequency of 1333.

Cpuz's memory tab reads single data rate which is the actual clock speed. Times that by two and you get 1333 DDR as described in the spd tab under timings table for jedec #4 and XMP. So if memory was actually running at 666 DDR then frequency in memory tab will say 333.
Think you're getting confused with 2x4GB and also double data rate.

Can you please run Cpuz and post screenshots of both memory & spd (selected installed slots) tabs, and we'll go from there.

I tried installing cpuz but when I clicked the "download now" button the page started loading for half a second and then nothing happens. Is there some third-party website I have to download it from and the official website doesn't work the way it should?

EDIT: I found a way to get cpuz installed
 
Thanks. So you can see each dimm slot has 4GB modules each running in dual channel and at a frequency of 1333.

Cpuz's memory tab reads single data rate which is the actual clock speed. Times that by two and you get 1333 DDR as described in the spd tab under timings table for jedec #4 and XMP. So if memory was actually running at 666 DDR then frequency in memory tab will say 333.
 
Solution
That makes sense, however, it does say 8GB on the stick itself and the "2x4GB" in parentheses. So it's still a question whether I should have 16GB or not. The whole thing says "1333MHz 8GB (2x4GB) 9-9-9-24 1.50V Ver2.12". And I have 2 of those installed. I feel like Corsair should have something on these but I haven't been able to find anything on them because they're so old.