PC2100 ddr not working on Trigem Imperial mobo
I recently bought some second-hand memory in an auction to install on a Trigem Imperial motherboard (same mobo as the HP Pavilion 533w).
The memory requirements are:
Memory Type: Unbuffered DDR Synchronous DRAM (DDR SDRAM)
Memory Speed: PC2100/PC1600 Memory Sockets: Two 184-pin 2.5 V DIMM sockets
Maximum Memory: 2 GB Front Side Bus: 400MHz
The memory I bought is supposed to be Azenram 256MB PC2100, and it has 8 chips on it (which I understand to mean that it is non-ecc). However when I install it the machine won't boot. It just gives out a pattern of beeps as if no memory was installed. I have tried moving the memory from one slot to another and I have been careful to click it into place properly each time.
Does this mean that the memory is incompatible, despite the specs making it llok like it was compatible, or have I been sold a dud?
The code on the chips is ARC16M16D4DTH, but I cannot find any reference to this in Google, or even to the manufacturer code "ARC".