What is the max ram that you can put in this box?

The maximum memory supported is 128 GB.

Questions & Answers: Refurbished: HP ProDesk 600G5 Desktop PC | Intel Core i7 9th Gen Octa Core | 32GB RAM | 1TB SSD | Windows 11 Pro | WiFi + Bluetooth

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Fast & Reliable Performance Powered by an Intel Core i7-9700 processor and 32 GB of DDR4 memory, this renewed PC handles everyday tasks like browsing, email, video calls, and streaming with ease.
Spacious & Speedy Storage With a 1TB SSD, youll have plenty of room for files, photos, and programs and enjoy quick load times and a fast boot-up.
Ready to Connect Pre-installed with Windows 11 Pro and WiFi/Bluetooth for easy, cable-free connection to devices, networks, and accessories.
Versatile Performance Whether you're working from home, attending online classes, shopping, or staying in touch with family, this 600G5 adapts to your routine.
Includes Essential Accessories Comes with 5G wifi/bluetooth adapter, new wired gaming keyboard and mouse, and new RGB speakers. This professionally refurbished PC has been tested and inspected for quality, reliability, and performance.