Since the D33025 code is ambiguous, use one of the following methods to find the specific model (e.g., DG31PR, DP55WB, or DG41TY) so you can download the correct documentation:

Tools like CPU-Z can quickly identify your motherboard model under the "Mainboard" tab. Step 2: Common Legacy Board Manuals (D33025 Marking)

Physically inspect the motherboard for a small white barcode label. Intel boards are primarily identified by an AA number (Altered Assembly), which looks like E21088-xxx or similar.

Based on historical records, the D33025 marking is most commonly associated with these legacy Intel boards. You can find their manuals on archival sites like The Retro Web or Intel’s support archive :