RAM & storage glossary
Memory sticks, their settings, and the drives that store your files. Each term is explained in plain English, in a sentence or two.
4 terms on this page
- Memory training
After new RAM, a BIOS update or a reset, the motherboard tests the memory at different settings to find what works. While it does this the screen stays black, sometimes for a few minutes on modern DDR5 PCs. Switching off too soon just restarts it.
Mentioned in: PC Turns On But No Display · PC Won't POST · Motherboard Debug Lights Meaning
- XMP / EXPO
RAM runs at a safe default speed out of the box. XMP (Intel) and EXPO (AMD) are BIOS settings that switch it to the faster speed printed on the box. Not every combination of RAM and processor handles it, and if it fails, the PC may not start until you clear the CMOS.
Mentioned in: PC Turns On But No Display · PC Won't POST · Motherboard Debug Lights Meaning
- RAM slots (A2 / B2)
Most boards have four memory slots, labeled A1, A2, B1 and B2. With two sticks, the manual usually tells you to use A2 and B2 (the second and fourth slots counting from the processor) for the best performance and compatibility.
Mentioned in: PC Turns On But No Display · Motherboard Debug Lights Meaning
- QVL (memory support list)
The QVL (Qualified Vendor List) is a list on the motherboard maker's website of memory kits tested with that board. RAM that isn't on it often still works, but if you have problems, a listed kit is the safe choice.
Mentioned in: PC Turns On But No Display · Motherboard Debug Lights Meaning
Other glossaries
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