Issue with RAM

[ChorryPotter]

Hi, I have an issue with my new PC. It appears that only one of four RAM slots is working. My computer boots only when one RAM stick is in slot B1. I've tried many different solutions, including using different RAM kit, but nothing works. BIOS keeps showing me message that I should change a slot from B1 to A2, if I want to use my memory in single-channel, but when I do so, my pc doesn't boot.

[Korwin]

What hardware are you using?
What's motherboard/RAM modules vendor and what's CPU generation?

[ChorryPotter]

GIGABYTE B860M AORUS ELITE WIFI6E ICE

INTEL CORE ULTRA 5 245KF

KINGSTON FURY DDR5 (XMP COMPATIBLE)

[ChorryPotter]

I've also tried some OEM RAM kit with memory chips from Samsung

[Korwin]

IMHO, your motherboard and/or CPU is defective.
Have you check BIOS updates for your motherboard? 

[Ramgound_Intel]

Hello ChorryPotter,

Thank you for posting on Intel Community Forum and sharing the detailed description of the issue.

Based on the information provided, since the components are compatible and you have already tested with different RAM kits, the behaviour you are experiencing indicates a likely hardware-related issue. The fact that the system only boots with a module in slot B1 and fails in channel A (A1/A2) points to the following probable causes:

• Bent Pins in the CPU Socket
• Over-tightened CPU Cooler
• Dead Memory Channel / Defective Motherboard

Recommended Steps to Troubleshoot

1.  Then try booting with RAM in slot A2.
2. Inspect the CPU Socket
3. Look for any bent or misaligned pins, as even a minor misalignment can cause an entire memory channel to stop working.
4. Check CPU Contact Pads
5. Ensure the gold contact pads are clean. Make sure there is no thermal paste, dust, or debris present.

Additionally, kindly help us with the below information:

Check memory slot by installing one memory at a time at different slot to isolate the issue.

How and from when this issue is occurring?

Any Hardware and Software changes done?

If the issue persists after performing these checks, it may indicate a faulty motherboard or CPU memory controller, and further replacement evaluation may be required.

Please let us know the outcome after attempting these steps, and we will be glad to assist you further.

Best Regards,

Ramgound

Intel Customer Support Technician

[ChorryPotter]

Hi!

1. I've checked the CPU Socket (didn't notice any bent pins), cleaned the CPU using isopropyl alcohol, replaced thermal paste and reinstalled the CPU cooler. Unfortunately, nothing's changed.

2. I've already tested each RAM slot, and I am sure that only slot A1 works.

3. This computer is brand new, and the issue has been occurring since the first start-up. 

4. The BIOS was updated to the newest version.

I'm attaching pictures of the CPU socket and the CPU itself.

Thank you for your help!

[ChorryPotter]

Is there a way to determine whether it is a faulty motherboard or CPU memory controller?

[VARADHARAJAN]

@ChorryPotter 

one user told in other forum,  that RAM slot on motherboard  had bent fins , he fixed by tweezers,  after that all ram modules are worked 

[Ramgound_Intel]

Hello ChorryPotter,,

Thank you for the detailed update and for performing those troubleshooting steps—we appreciate your effort. Also, thank you for sharing the images. We will review them internally; at first glance, please ensure that the images are clear and focused so we can accurately assess any potential abnormalities.

To proceed further, we would like to request a few additional checks:

• Could you please confirm whether the system is able to POST with a single RAM module installed individually in slots A2, B1, or B2?
• Also, Kindly help us with the processor and motherboard model.
• When attempting to boot from these slots, do you observe any diagnostic LEDs, beep codes, or error messages?
• Kindly check if there are any visible signs of damage, debris inside the DIMM slots themselves.
• Have you had the opportunity to test the same CPU and RAM on a different motherboard?
• If yes, and the system works normally on another board, this could indicate a potential hardware issue with the current motherboard.

These details will help us further isolate whether the issue is related to the motherboard, CPU memory controller, or another component.

We look forward to your update and will continue assisting you accordingly.

Best Regards,

Ramgound

Intel Customer Support Technician