Don't rely on software for soldered RAM compatibility.

No, there isn’t really a tool for that.

Soldered RAM is physically attached to the motherboard. You can’t remove it or add more without a free slot. Software can only read what’s already there—it can’t tell you if a new stick will work alongside the soldered modules because that depends entirely on the motherboard’s design and firmware.

If your laptop has one soldered stick and an empty slot, you still can’t trust a software tool to predict compatibility. Programs like CPU-Z or HWiNFO will show you the current RAM specs (speed, timings, voltage), but the real compatibility test is whether the BIOS supports mixing that soldered module with a new one. That’s a manufacturer-specific thing. You need to check your laptop’s exact model support page or look up a RAM upgrade guide from people who’ve tried it.

This is a case where research beats running an app.