Best local LLM setup under £500 for coding (2026)

runs Qwen2.5-Coder-32B-Instruct Q4_K_M · no published benchmark yet

Qwen2.5-Coder-32B-Instruct Q4_K_M for around £403 — the best coding value at this budget

• This is a noisy, fiddly, enthusiast build — not for someone who wants it to 'just work'
• Corporate towers (Dell OptiPlex, HP EliteDesk/ProDesk) often ship with proprietary or low-wattage PSUs — check for a free PCIe x16 slot, physical case clearance, and budget for a replacement 750W PSU before buying a GPU for it
• Passive cooling only — no fan. You must fit a 3D-printed shroud and a high-static-pressure fan or it will thermal-throttle
• No video output at all — you need a second GPU or the host's onboard/iGPU video for a display
• Requires 'Above 4G Decoding' / Re-Size BAR enabled in the host BIOS to be recognised correctly
• Pascal architecture with no Tensor Cores — markedly slower than a same-VRAM RTX card, so pin your driver/CUDA versions and avoid bleeding-edge llama.cpp builds that assume newer GPUs
• Draws ~250W continuously under load — a real electricity cost if left on
• Buy new, not used, and confirm it has enough spare 8-pin PCIe power connectors for the GPU you're pairing it with — a failing or underpowered PSU can take a used GPU down with it

• Used office tower PC (i5, no GPU, 16GB RAM)£55–95
• NVIDIA Tesla P40 24GB (used, datacentre)£210–270
• 750W ATX PSU, 80+ Bronze or better (new)£75–100

runs Qwen2.5-Coder-14B-Instruct Q4_K_M · no published benchmark yet

Qwen2.5-Coder-14B-Instruct Q4_K_M for around £373 — a strong coding option at this budget

• Limited to models that comfortably fit in 12GB VRAM (roughly 8B-class at Q4)
• Cheapest way into a usable local chat rig as of August 2026
• Corporate towers (Dell OptiPlex, HP EliteDesk/ProDesk) often ship with proprietary or low-wattage PSUs — check for a free PCIe x16 slot, physical case clearance, and budget for a replacement 750W PSU before buying a GPU for it
• Needs a PSU with a free 8-pin PCIe connector
• Plain GDDR6 (not GDDR6X) has kept this card largely insulated from the 2026 memory-chip shortage — currently the best £/VRAM entry point
• Buy new, not used, and confirm it has enough spare 8-pin PCIe power connectors for the GPU you're pairing it with — a failing or underpowered PSU can take a used GPU down with it

• Used office tower PC (i5, no GPU, 16GB RAM)£55–95
• NVIDIA RTX 3060 12GB (used)£195–225
• 750W ATX PSU, 80+ Bronze or better (new)£75–100