AMD Duron 900

An uncommon CPU. Most Duron's at 900MHz are based on the Spitfire core (which is the budget version of the Thunderbird core). When AMD shifted to the Palomino core (for use in their Athlon XP processors) they also created the Morgan core for the new Duron processors. Often you'll only find Morgan CPU's clocked past 1000MHz. References at AMD always mentioned 900MHz and 950MHz 'Morgan' parts but I never saw them in the flesh nor noticed people on forums who owned one. Now, about 14 years later, I obtained one.

It's OPN (Ordering Part Number) is DHD900AUT1B. The regular 'Spitfire' Duron 900 has OPN D900AUT1B. Another twist can be found in the OPN of this CPU: Morgan's all have OPN's ending with AMT1B rather than AUT1B. The difference is that U is used on CPU's configured for 1.6V and that M is used for the higher 1.75V. Back in the day this was one drawback of the new Duron 'Morgan' because every hoped it would use a lower or at least an equal voltage compared to the older Spitfire generation but this was not the case. Higher voltage means more energy consumption and more heat output.