Instantly make your system boot FASTER for free!
📚 Main topics
- What Memory Context Restore doesMemory Context Restore (MCR) saves a known-good RAM configuration so the system can reuse it instead of fully retraining memory on every boot. The setting may have different names depending on the motherboard manufacturer. 1:03
- Why memory training happensThe CPU and motherboard check whether the RAM’s speed, timings, and voltages are stable. Training can take longer with faster RAM or more populated memory slots, and may repeat if the system needs to adjust settings. 2:05
- How MCR affects boot timeWith MCR off, the system retrains memory at startup; with it on, it can quickly validate and reuse the saved configuration. In the demonstration, booting to the splash screen took about a minute with MCR off and about 12 seconds with it on. 16:03 18:08
- When the system may retrain anywayA full power disconnection, BIOS update, CMOS clear, or changes to memory configuration can trigger retraining even if MCR is enabled. 5:13 12:27
✨ Key takeaways
- Recommended for most usersFor gaming and everyday computing, enabling MCR can make booting much faster. 8:50
- Prioritize stability when neededIf maximum memory stability is essential, leave MCR off and accept longer boot times so memory is retrained on each startup. 9:52
- Watch for signs of instabilityBlue screens, crashes, or other unusual behavior may indicate a memory stability issue, particularly with fast RAM or overclocking. 7:49
- Boot loops don’t always require clearing CMOSSometimes the system just needs to retrain memory and update its saved configuration. 13:29
🧠 Lessons learned
- Retraining can help refresh the saved profileIf problems arise with MCR enabled, turn it off, boot to let memory retrain, then enable it again. 8:50
- A first boot or configuration change takes longerInitial setup, a BIOS update, or a CMOS clear may require a more extensive training process. 5:13
- Long boot times can be normalA DRAM indicator or code 15 can mean memory training is in progress, rather than that the RAM is faulty. 3:08
🏁 Conclusion/next steps
- Choose the setting that suits your prioritiesEnable MCR for faster everyday boots, or leave it off if the longest possible memory validation matters more. If instability appears, retrain memory by switching MCR off and then back on. 19:15
Transcript excerpt
0:00 So recently when we did the video about upgrading uh Phil to Threadripper 9980X uh crazy CPU as if it was a Idiocracy's big ass. >> We talked about how long it could take for memory to train code 15 and all that sort of stuff and there was a lot of comments in that video and I've heard these comments over time that are just like ah my system does it every time. Why does memory constantly train blah blah blah. So today we're going to talk about memory context restore. It's not a setting that a lot of people are too familiar with and there's a lot of like
0:31 with obviously AMD CPUs becoming the meta over the last few generations. I think there's a lot of people still that still understand what it is, what it does and whether or not you should turn it on or turn it off. So today we're going to talk about it, what it does, and then do a demonstration so that you guys can become familiar with that setting and determine whether or not it's right or wrong for you to leave it on because I don't think it's a one-sizefits-all um type of solution. Okay, so first things first, what is memory context restore? Uh, you'll see it referred to as a few different things. Memory context restore, MCR. Um,
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