if you already have an HP EliteDesk 800 G1 chassis and PSU. No if you want a standard PC build – the proprietary power and case make it more trouble than it’s worth for most DIY builders.
for low-profile graphics cards and standard SATA ports for storage. hp 2b34 motherboard
The single most impactful upgrade for an HP 2B34 system is installing a Solid State Drive. While the SATA II interface if you already have an HP EliteDesk 800 G1 chassis and PSU