There are multiple ways to check a phone's configuration. Let me guide you through using the widely popular CPU-Z app.
To check Sony Xperia X's specifications with CPU-Z app, follow these steps:
Step 1: Download the CPU-Z app from Google Play Store. After downloading, open the app.

Step 2: SOC Information.

Step 3: DEVICE Information.

Step 4: SYSTEM Information.

Step 5: BATTERY Information.

Step 6: THERMAL Information.

Step 7: SENSORS Information.



So, we've examined quite detailed specifications of the Sony Xperia X.
Wishing you all success.