I recently bought a used computer that currently has an 8GB DDR4 RAM stick installed. I want to upgrade the RAM to 16GB, but I'm not sure about the specifications of the RAM. I've seen a mention that it might be 3200MHz, but the BIOS shows a speed of 2129MHz. I'm at the store looking for a new RAM stick and I want to ensure compatibility; what should I look for?
5 Answers
It's generally best to match your new RAM as closely as possible to your existing one. If your budget allows, consider getting a new kit of 2x8GB modules to ensure everything works well together.
If you can’t find a kit of 2x8GB, just look for the closest match to your current RAM in terms of brand, model, and specs. The 2129MHz you’re seeing suggests it’s not running at full speed without XMP, so keep that in mind when shopping.
If your RAM is 3200 but the BIOS shows 2129MHz, it’s likely running on its base frequency because XMP/EXPO isn’t enabled. Try to get RAM that closely matches your existing stick, and enable XMP (for Intel) or EXPO (for AMD) after installing.
A good step is to download CPU-Z and check the SPD tab. It will give you the exact specifications of your current RAM stick. This way, you can find a matching module to make a total of 16GB. However, if you're out shopping, that might be tricky.
Exactly! Plus, don't forget to look up your CPU specs to see the max supported RAM speed.
If you can, take a look at the RAM stick that's already installed in your PC. There should be a sticker that lists all the specifications, like MHz and CL. It's better to buy a matching set that comes in one package, even if you have to pull the stick out to check.
Yeah, that's true. If you're already at the store, you might need to check the current stick physically.