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Why is only part of my RAM usable?

ER_Canappa
By ER_Canappa
in CPUs, Motherboards, and Memory
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Hi everyone, 

In my build i am using two 4 GB sticks of RAM and two 8 GB sticks, both of the same brand.

Up until now i didn't have any problems, everything was fine, but today i went to check in the windows information settings and i noticed that all of a sudden it started saying "24GB installed (11,9 usable)", or something similar. I tried switching them around, only using two at a time, changing slots and everything works fine, no problems come up, but as soon as i put all for in in this order "8-4-8-4", it goes back to the 11,9 GB available. I already had this problem happen once, but i was able to fix it somehow, never actually understood how. Anyone know a solution ?

 

Thank you in advance.

 

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4 minutes ago, ER_Canappa said:

"8-4-8-4"

Not all motherboards are ABAB for RAM slots (although most are). Make sure it's not AABB.

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33 minutes ago, Nocte said:

Not all motherboards are ABAB for RAM slots (although most are). Make sure it's not AABB.

I'm not entirely sure.

The motherboard i'm currently using is a B450M DS3H.

i always had the RAM mounted in this order and it is only now giving me this problems, so i don't think it's a matter of ABAB or AABB.

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1 hour ago, ER_Canappa said:

Hi everyone, 

In my build i am using two 4 GB sticks of RAM and two 8 GB sticks, both of the same brand.

Up until now i didn't have any problems, everything was fine, but today i went to check in the windows information settings and i noticed that all of a sudden it started saying "24GB installed (11,9 usable)", or something similar. I tried switching them around, only using two at a time, changing slots and everything works fine, no problems come up, but as soon as i put all for in in this order "8-4-8-4", it goes back to the 11,9 GB available. I already had this problem happen once, but i was able to fix it somehow, never actually understood how. Anyone know a solution ?

 

Thank you in advance.

 

Do you have a lot in Hardware Reserved?

"Do what makes the experience better" - in regards to PCs and Life itself.

 

Onyx : AMD Ryzen 7 7800x3d / MSI 6900xt Gaming X Trio / Gigabyte B650 AORUS Pro AX / G. Skill Flare X5 6000CL36 32GB / Samsung 980 1TB x3 / Super Flower Leadex V Platinum Pro 850 / EK-AIO 360 Basic / Fractal Design North XL (black mesh) / AOC AGON 35" 3440x1440 100Hz / Mackie CR5BT / Corsair Virtuoso SE / Cherry MX Board 3.0 / Logitech G502

 

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37 minutes ago, ER_Canappa said:

I'm not entirely sure.

The motherboard i'm currently using is a B450M DS3H.

i always had the RAM mounted in this order and it is only now giving me this problems, so i don't think it's a matter of ABAB or AABB.

When you initially installed this RAM, did you actually check to make sure you had no issues, and everything was working as you expected it to?

"It pays to keep an open mind, but not so open your brain falls out." - Carl Sagan.

"I can explain it to you, but I can't understand it for you" - Edward I. Koch

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2 hours ago, Godlygamer23 said:

When you initially installed this RAM, did you actually check to make sure you had no issues, and everything was working as you expected it to?

Yes, everything worked just fine. Everything started when I needed the two 4gb sticks for something else, which I didn't end up doing but I still had taken them out. Once back in the problem started showing up.

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2 hours ago, Dedayog said:

Do you have a lot in Hardware Reserved?

What do you mean?

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Just now, ER_Canappa said:

Yes, everything worked just fine. Everything started when I needed the two 4gb sticks for something else, which I didn't end up doing but I still had taken them out. Once back in the problem started showing up.

Did you continue to use the build in between?

"It pays to keep an open mind, but not so open your brain falls out." - Carl Sagan.

"I can explain it to you, but I can't understand it for you" - Edward I. Koch

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22 minutes ago, ER_Canappa said:

What do you mean?

In Task Manager, under Performance, then RAM...  There is a Hardware Reserved amount...

 

image.png.01bd174b59762d00d1ecfe2d0ec025e0.png

 

 

"Do what makes the experience better" - in regards to PCs and Life itself.

 

Onyx : AMD Ryzen 7 7800x3d / MSI 6900xt Gaming X Trio / Gigabyte B650 AORUS Pro AX / G. Skill Flare X5 6000CL36 32GB / Samsung 980 1TB x3 / Super Flower Leadex V Platinum Pro 850 / EK-AIO 360 Basic / Fractal Design North XL (black mesh) / AOC AGON 35" 3440x1440 100Hz / Mackie CR5BT / Corsair Virtuoso SE / Cherry MX Board 3.0 / Logitech G502

 

7800X3D - PBO -30 all cores, 4.90GHz all core, 5.05GHz single core, 18286 C23 multi, 1779 C23 single

 

Emma : i9 9900K @5.1Ghz - Gigabyte AORUS 1080Ti - Gigabyte AORUS Z370 Gaming 5 - G. Skill Ripjaws V 32GB 3200CL16 - 750 EVO 512GB + 2x 860 EVO 1TB (RAID0) - EVGA SuperNova 650 P2 - Thermaltake Water 3.0 Ultimate 360mm - Fractal Design Define R6 - TP-Link AC1900 PCIe Wifi

 

Raven: AMD Ryzen 5 5600x3d - ASRock B550M Pro4 - G. Skill Ripjaws V 16GB 3200Mhz - XFX Radeon RX6650XT - Samsung 980 1TB + Crucial MX500 1TB - TP-Link AC600 USB Wifi - Gigabyte GP-P450B PSU -  Cooler Master MasterBox Q300L -  Samsung 27" 1080p

 

Plex : AMD Ryzen 5 5600 - Gigabyte B550M AORUS Elite AX - G. Skill Ripjaws V 16GB 2400Mhz - MSI 1050Ti 4GB - Crucial P3 Plus 500GB + WD Red NAS 4TBx2 - TP-Link AC1200 PCIe Wifi - EVGA SuperNova 650 P2 - ASUS Prime AP201 - Spectre 24" 1080p

 

Steam Deck 512GB OLED

 

OnePlus: 

OnePlus 11 5G - 16GB RAM, 256GB NAND, Eternal Green

OnePlus Buds Pro 2 - Eternal Green

 

Other Tech:

- 2021 Volvo S60 Recharge T8 Polestar Engineered - 415hp/495tq 2.0L 4cyl. turbocharged, supercharged and electrified.

- Lenovo 720S Touch 15.6" - i7 7700HQ, 16GB RAM 2400MHz, 512GB NVMe SSD, 1050Ti, 4K touchscreen

- MSI GF62 15.6" - i7 7700HQ, 16GB RAM 2400 MHz, 256GB NVMe SSD + 1TB 7200rpm HDD, 1050Ti

- Ubiquiti Amplifi HD mesh wifi

 

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10 hours ago, Godlygamer23 said:

Did you continue to use the build in between?

No, I was doing something that took me 30 minutes max, so I didn't use the build in the mean time.

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Update:

 

I tried putting the two sticks back in in the order A-A-B-B, and it is now working fine. It's weird that it is because I always had them alternated and it never gave any problems, so I'm gonna guess I still won't know what the problem was. I hope I'll never get this problem again.

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