I've got a stash of RAM lying around, including DDR4 ECC and some regular DDR4 for desktops. Since RAM used to be cheap, I didn't mind replacing kits if they had issues. But now that RAM is pricier, I want to check what still works. I came across these memory testers that are about $50, which seems suspiciously cheap. From what I gather, they do a simple current test where each LED shows if the data circuits are stable—the brighter the LED, the better. I know that bad memory usually comes from hardware issues, so on paper, this should work well. But I'm curious if anyone's actually used one or has any experience with these models, as I can't seem to find much info online.
4 Answers
If you're looking for a testing method, you might want to just use Memtest86+. It’s a solid option to check RAM without needing extra hardware, although setting up might be a hassle.
Absolutely! If a RAM stick fails the tests on one of those, it’ll usually show problems in real use too. Anything that passes might still need to be tested further in a computer before you know it’s reliable.
I doubt those testers will catch every issue—especially if some RAM cells are problematic. It's often said that you can find out if RAM has issues quickly when used in an actual machine. Maybe the wiser choice would be to invest in a used motherboard and CPU setup. Those would give you a better understanding before you trust your RAM.
I’ve never come across those cheap testers before. If you get one, please let us know how it performs!

True, but I find it a bit annoying since testing DDR4 ECC requires special motherboards. Plus, for DDR4 and DDR5, you'd need a whole setup which gets tedious.