Dell OptiPlex 790 Power Supply – Reliable Replacement for Long-Term Stability
Power Up Your Dell OptiPlex 790 the Right Way
Looking for a high-quality Dell OptiPlex 790 power supply? We offer reliable, fully compatible replacement units designed specifically for the OptiPlex 790 series—whether you’re using the Mini Tower, Small Form Factor (SFF), or Ultra Small Form Factor (USFF).
Power your system with confidence. No compatibility issues. No compromises.
Tailored for Your Dell OptiPlex 790 Model
Dell’s OptiPlex 790 came in different form factors, each requiring a specific PSU type. Here’s a quick guide:
Mini Tower (MT): 265W–320W ATX-style PSU
Small Form Factor (SFF): 240W proprietary SFF PSU
Ultra Small Form Factor (USFF): External power adapter
Make sure you match the PSU to your exact chassis type.
Specifications You Can Trust
Our OptiPlex 790-compatible power supplies are built to last, offering:
Wattage: 240W–320W (depending on model)
Input: 100–240V AC
Form Factor: Dell-specific SFF, MT, or USFF units
Efficiency: 80 PLUS Bronze Certified
Connectors: 24-pin ATX, 4-pin CPU, SATA, Molex
Supports standard CPUs, HDDs, SSDs, and some low-profile GPUs.
When Should You Replace the PSU?
Your Dell might be showing signs of a failing power supply. Here are red flags:
Random system shutdowns
PC doesn’t power on
Burning smell or excessive heat
PSU fan failure or loud noises
Replacing the PSU early protects your motherboard, storage, and other components.
Ideal for Office, School, and Home Use
The OptiPlex 790 remains a reliable workhorse in business and education settings. A strong power supply ensures:
Smooth multitasking
Dependable uptime
Stable performance under load
From Excel to email to light creative work—this PSU keeps everything running efficiently.
Easy Installation with No Guesswork
Dell systems are known for clean design and tool-less access. Replacing the PSU is quick:
Open the case (thumb screws or release latch)
Disconnect the old PSU cables
Unscrew and remove the PSU
Insert the new PSU and reconnect cables
Power up and test—done!
Even first-time upgraders can do it in under 15 minutes.
Why Buy From a Trusted Source?
Not all PSUs are created equal. Cheap knockoffs often lack proper voltage regulation, causing long-term damage.
We guarantee:
100% compatibility with Dell systems
Clean, tested units
Prompt shipping and customer support
Return and warranty coverage
Buy once. Get it right.