A GPU (Graphics Processing Unit) — also called a graphics card or video card — is the component in a desktop PC responsible for rendering images, video, and 3D graphics. In gaming desktops, it is the single most important component for performance, and the primary factor in desktop PC buyback value.
GPU vs CPU — What’s the Difference?
A CPU handles general tasks — running Windows, applications, and game logic. A GPU specialises in parallel processing — handling thousands of calculations simultaneously for graphics rendering, AI inference, and video encoding. High-end GPUs have thousands of cores compared to a CPU’s 8–32.
Main GPU Brands
Nvidia GeForce — the dominant desktop gaming GPU brand. Current generation is RTX 40 series (4060, 4070, 4080, 4090). Uses CUDA for AI workloads. Generally preferred for gaming and AI.
AMD Radeon — competitive alternative. Current generation is RX 7000 series (7600, 7700 XT, 7800 XT, 7900 XTX). Uses ROCm for AI on Linux. Strong value at mid-range price points.
Intel Arc — newer entrant. A770, A750 series. Good value for budget builds but smaller market share affects resale value.
Key GPU Specs to Know
VRAM — Video RAM on the GPU itself. More VRAM allows higher resolution textures, larger AI models, and more complex scenes. 8GB is entry-level; 16–24GB is recommended for gaming at 1440p/4K or running AI workloads locally.
TDP — Thermal Design Power. How much power the GPU consumes under load. High-end GPUs (RTX 4090) can draw 450W — requires a capable PSU and good case airflow.
PCIe slot — GPUs connect to the motherboard via a PCIe x16 slot. Gen 3, 4, and 5 are all compatible but newer generations offer more bandwidth.
GPU and Desktop Buyback Value
When selling a gaming desktop, the GPU model is the primary driver of the offer price. A system with an RTX 4090 is worth significantly more than the same system with an RTX 3060, even if everything else is identical. GPU condition, mining history, and remaining manufacturer warranty also affect the final offer.
Selling just the GPU? See our GPU buyback page. Selling the whole gaming desktop? See our desktop PC buyback page.
People Also Ask
What are the signs of a failing GPU? +
Common signs include: artifacting (random coloured pixels, visual glitches, or geometric patterns on screen), no display output despite the PC powering on, black screen crashes under GPU load, fan noise that’s louder or unusual, and driver crashes with errors like “Display driver stopped responding.” Overheating is often the root cause — check GPU temperatures with MSI Afterburner. If temperatures exceed 90°C under load, thermal paste replacement or cleaning is likely needed. See our GPU repair service for diagnosis.
How long does a GPU last? +
A well-maintained GPU used for normal gaming typically lasts 5–8 years before becoming obsolete for current games (not because it fails, but because performance falls behind). Hardware failure before that point is uncommon with proper cooling and clean power. GPUs with mining history may have significantly shortened lifespans due to sustained 24/7 operation. In Singapore, keeping the GPU cool with regular case cleaning extends lifespan significantly.
Can a GPU be repaired in Singapore? +
Yes. BreakFixNow provides GPU diagnosis and repair in Singapore for Nvidia, AMD, and Intel Arc cards. Common repairable faults include thermal paste replacement (restores overheating GPUs), BGA reflow (for no-display or artifacting faults caused by solder joint failure), and fan replacement. Not all GPU faults are repairable — VRAM failure and severe die damage typically require replacement. Free diagnosis is available to assess whether repair or replacement makes more financial sense. See our GPU repair page.
How do I sell my GPU in Singapore? +
You can sell a GPU on Carousell, HardwareZone’s Buy/Sell forum, or directly to BreakFixNow for an instant cash offer. BreakFixNow buys GPUs from all major brands — Nvidia, AMD, and Intel Arc — with same-day payment via cash or PayNow. Visit our GPU buyback page for current prices and to WhatsApp a quote before coming in.
Does GPU mining history affect resale value? +
Yes — significantly. Mining runs a GPU at near-maximum power 24/7, accelerating fan wear, thermal stress on VRAM, and degradation of capacitors and VRMs. A mining GPU of the same model and age will command a lower buyback price than a gaming-use GPU. BreakFixNow assesses mining history as part of the GPU buyback evaluation. See our Mining History glossary term for a full breakdown of how it affects value.
← Desktop PC Glossary
