Does the CPU debug light activate when two RAM sticks are installed?
Does the CPU debug light activate when two RAM sticks are installed?
So I just completed assembling my PC, but as the title suggests, I see the debug light when two RAM sticks are installed. It’s strange because everything seemed fine at first, but after switching the XMP profile, rebooting, and re-entering BIOS, the system would freeze and needed a restart. Now I’m stuck in a boot loop whenever two RAM sticks are present. The BIOS automatically reset the CMOS once I tried with just one stick.
I’ve adjusted the RAM voltages up to 1.35V, changed the SoC voltage to 1.1V, and tested the RAM separately on both DIMM slots. No problems there. But it didn’t work with DIMM 3 and 4, though I’m not sure if that’s intentional. I also tried reflashing the BIOS without success. I’m running out of options and would really appreciate some guidance.
Details:
- Motherboard: MSI MPG B550 Gaming Plus
- CPU: Ryzen 5 5600
- GPU: Asus Strix Force RTX 2080
- RAM: Corsair Vengeance LPX (2 x16GB) @3200Mhz
- Power Supply: Corsair CX650m 650W
The motherboard you mentioned?
https://download.msi.com/archive/mnu_exe...NGPLUS.pdf
[Make sure you have the correct User Guide.]
According to the User Guide, on physically numbered Page 15:
"Always insert memory modules in the DIMMA2 slot first."
Confirm that your installed RAM is compatible, that the right slots are being used, and that the RAM is placed correctly.
In particular, put the DIMMA2 slot first.
Certainly, here is the rewritten version:
It appears the user manual is accurate. I added it into DIMMA2 initially. I tested all slots using a single stick, and all slots function except for DIMMB2, even though the BIOS cautions against placing RAM in DIMMA1 or DIMMB1—it still boots. Only DIMMB2 fails to start, trapping me in a loop. The RAM is also functioning properly, as I can clock it and boot normally with one stick. Previously, both RAM sticks worked when XMP profile was enabled (without any operating system). However, I encountered a boot loop only after enabling XMP, which is puzzling. I’m not sure why this happened. What seems unfair is that it worked before the upgrade, during the first boot afterward. It operated smoothly without issues, as I checked the BIOS settings.
I attempted to reset the CMOS using a screwdriver through the JBAT1, since I don't have the jumper plastic part, but I'm not sure if that worked. Regarding changing the CMOS battery, do you believe it would be effective? I'm wondering if this might be a defect model, though it seems to have worked before. Also, DIMMA1 and DIMMB1 function independently when using just one stick; however, with dual channel it causes a boot loop, which is quite unusual.
A new CMOS battery might function, but it's uncertain. Swapping the battery is generally straightforward and worth a try. If issues persist: "no harm, no foul." The screwdriver reset is often used, though caution is needed—ensure it maintains full connectivity. Observe other cards and computers for connectivity problems. Consider using a jumper if necessary. For defective MBs, it's not unusual for motherboards to work initially before components fail after power cycles. Also, verify whether the RAM modules were sourced from a dual-channel kit and if DIMMB2 is indeed the root cause. Use a bright flashlight to examine the slot for debris or damage.
There isn't any jumper present at all. I'm confused about why it's not included... It looks like a small plastic component, similar to how much more expensive it could be?
Yes, they are twins—two 16GB sticks designed to work together. That seems correct; however, using dual channel with DIMMA1 and DIMMB1 doesn't function either. I'm really puzzled.
I'll investigate this as soon as possible. But I think there might be no damage.
I didn't realize I needed to check for bent CPU pins. They appear to be in good condition. The PC operates perfectly with just one stick, and games are running smoothly.
Activating maximum velocity for the RAM, which means configuring it to operate at 3200 Mhz.