Your GPU died. The manufacturer won't help. Local shops can't do board-level work.
We can. And here's what we promise.
Your hardware,
our Reliable approach.
While our primary focus is GPU repair, we also take on board-level work on other devices by request. Tell us about your device ›
REVIEWS
RTX 4090 · Melted power connector
“Their online booking and repair portal was particularly good, with clear status updates, direct messaging, photographs of the work and progress updates as the repair moved through each stage.”
RTX 5090 · Fire damage
“What impressed me most was their willingness to take on a genuinely difficult repair rather than simply saying it was uneconomical or impossible.”
Three Ryzen processors · Bent pins
“I have now put the 5800X3D in a build and it works perfectly fine”
VRAM UPGRADE
RTX 4090
First service of its kind in the UK*
Same capacity as a £7,000 RTX 6000 Ada, at a fraction of the price.§
From £1,000.
24GB → 48GB
VRAM doubled
24 × 2GB
Micron GDDR6X modules
900 GB/s
memory bandwidth
Built for memory-bound work, so larger models, longer context, and sustained AI runs all fit where 24GB runs out.‡
PCB & COOLER UPGRADES
GPU Transplants.
HOW IT WORKS
Six steps.
Zero ambiguity.
From booking to return, you see everything we do.
No surprises, no hidden costs.
Book
Tell us what happened. We reply as soon as we can, usually within 24 hours.
Ship
Send it to us, drop it off, or we generate a label for you.
Diagnose
We find the fault at board level and walk you through what we found.
Repair
Component-level repair on the board itself, the work most shops send away.
Test
Stress tested under full load, with a certificate on every fully tested repair.
Return
We pay the return shipping on every successful repair.
New to the name, not to the craft.
NOTES
- 1. Repair pricing is fixed and quoted upfront. Additional charges may apply for expensive replacement components such as memory chips. This is always discussed and agreed with you before any work begins.
- 2. Free return shipping included on all successful repairs, sent by Royal Mail Tracked 48. You can upgrade the return service at the payment stage by paying the difference. See Policies & Terms for the full shipping policy.
- * Blackstone Repair is the first dedicated provider of RTX 4090 24GB to 48GB VRAM upgrade services in the United Kingdom, to the best of our knowledge, last checked on 12 October 2026. This service is not endorsed by or affiliated with NVIDIA Corporation.
- § Based on the UK retail price of the NVIDIA RTX 6000 Ada Generation 48GB, approximately £7,000 as of July 2026. The RTX 6000 Ada is a professional workstation card and differs in other respects.
- † Pricing is from £1,000 when your original 12 memory chips are healthy and can be moved to the new board, and unlike a repair, an upgrade takes a deposit for the parts up front. Register your interest for an exact price.
- ‡ Increased VRAM capacity reduces out-of-memory errors for most workloads. Results may vary depending on model size, batch size, and framework configuration.