Computer Power Supply Upgrade Services in London – PSU Replacement & Installation

Experiencing random shutdowns, no power, or planning to install a new GPU or CPU? A reliable power supply unit (PSU) is critical for system stability. At Computer Maintenance Repairs, we provide professional power supply upgrade and replacement services for desktop computers, gaming rigs, and custom-built PCs across London.

Common Reasons for Power Supply Upgrades

• Power surges or PSU failure causing no-boot or black screen
• Installing a high-end GPU that requires more wattage
• System crashing under load or during gaming sessions
• Outdated PSU with no PCIe 6/8-pin connectors
• Replacing noisy, overheating or non-efficient power supplies

Supported PSU Brands & Wattages

• Corsair: CX550M, RM750x, RM1000e
• EVGA: 600W BR, SuperNOVA 750 G5
• be quiet!: Pure Power 11, Straight Power 12
• Seasonic: Focus GX 650/850, Prime TX Series
• Cooler Master, Thermaltake, MSI, ASUS ROG

Service Includes

• System power draw assessment and PSU wattage calculation
• PSU selection (modular, semi-modular, or non-modular)
• Professional removal of old unit and cable re-routing
• Installation of the new PSU with clean cable management
• System boot and power stability testing

Compatible System Types

• Custom gaming PCs with RTX or Radeon GPUs
• Workstation towers (CAD, video editing, AI workloads)
• Pre-built desktops requiring PSU replacement
• Small Form Factor (SFX) and mini-ITX setups

Pricing & Warranty

Power supply upgrades start from £145 including the supply and installation of a standard 550W 80+ Bronze PSU. Pricing varies depending on wattage and certification (Gold, Platinum). A £54 diagnostic fee applies if you'd like a full PSU load evaluation. All upgrades come with a 3-month service warranty.

Book Your Power Supply Upgrade Today

Speak with our team at 020 7394 2525 or email info@computermaintenancerepairs.co.uk to request a quote. Bring your PC to our London workshop at Creative IT UK Ltd, Unit 1, 80 Willow Walk, The Willows, London SE1 5SY for a same-day power upgrade.