[SOLVED] Maybe my motherboard doesn't support higher speed RAM?

Jan 16, 2022
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Long-time lurker, first-time poster. Thanks for all the help and advice you guys have offered me over the years.

I have a matched set (2x) of A-DATA 8GB 2400 RAM installed. Works fine.
(AX4U2400WG16-BRZ)

I went to replace them with Corsair 8GB 3600 RAM
(2 matched sets (4x8GB)
(CMK16GX4M2D3600C18)
(The serial numbers on them are ...110-111 and ...133-134)

The motherboard (ASUS X99-A/USB 3.1) gave an angry red light to both RAM banks (the motherboard has 2 banks with 4 slots each) and could not turn on. Memory Okay (by pressing the button) could not find a usable configuration. The problem remained with one set (dual set-up and not) and with one stick.

When the A-DATA memory was added back in (dual then single), BIOS and Windows 10 would only recognize one stick (in the C1 slot for whatever reason). CPU-ID saw them all and said that there was 48 GB installed.

My only guess is that the motherboard doesn't support 3600 speeds. I can't find any documentation one way or the other. Setting the speed and voltage in BIOS to the Corsair memory (with the A-DATA memory uninstalled) doesn't get me anywhere (and requires me to reinstall the A-DATA stuff and use Memory Okay).
 
Jan 16, 2022
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Here are the PC components. It was built in Jan 2016, graphics, water cooler, and hard drives have been replaced since then.

Motherboard: Asus X99-A/USB 3.1
Processor: Intel i7 5820k @ 3.3 GHz
Cooling: Cosair water cooler (I don't know the model number); 2 case fans
Graphics: Nvidia GeForce RTX 3070 (8GB) (GA 104-302)
Memory: As above
Hard drives: 2 500GB SSD; 1 1TB SATA; 1 1TB SSD (PCIe)
Disks: Modisk BluRay read/write drive
 
Jan 16, 2022
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Thanks for the hint. I didn't realize that CPU affected RAM. It's not the motherboard, it's the CPU. I'm now more educated. :)
 

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