CPU, RAM, storage, GPU, network cards, servers, RAID, data centers and performance bottlenecks.
CPU, RAM and Storage
The CPU performs instructions. RAM holds active working data. Storage keeps data after power is off. A slow system may need more CPU, more RAM or faster storage depending on where the bottleneck is.
SSD, NVMe and RAID
SSDs are faster than spinning disks. NVMe drives are faster still because they use a high-speed connection. RAID can improve redundancy or performance, but it is not a replacement for backups.
Networking Hardware
Network interface cards, switches, routers and cables decide how fast data moves locally. A server with fast disks can still feel slow if it has a weak network path.
Real-World Example
If CPU is low, RAM is full and disk wait is high, the problem is probably storage pressure or insufficient memory for caching. Adding CPU would not solve the real bottleneck.
Data Center Basics
Servers need racks, power, cooling, fire suppression, physical security and network redundancy. Cloud data centers hide this from customers, but the physics still exist.
Beginner Checklist
- Learn how CPU, RAM and disk affect performance.
- Understand backup vs RAID.
- Check temperature and power limits.
- Monitor disk health and capacity.
- Use redundancy where downtime is expensive.
Hardware turns electricity into computation, memory, storage and network movement.
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