Is your GPU failing? Whether your screen is showing strange colours, your PC keeps crashing during games, or your graphics card is running dangerously hot — this guide will walk you through exactly how to diagnose the problem, step by step. No technical experience required.

At GPU Solutions, based in Dubai, we repair hundreds of graphics cards every year. These are the exact same checks our technicians run before touching a single component.

---

What You Will Learn

• The most common signs of a faulty GPU
• Simple checks you can do right now — no tools required
• Free software to test your GPU at home
• How to test GPU memory on Nvidia and AMD cards
• How to fix overheating issues
• What to do once you know what is wrong

---

What Does a GPU Actually Do?

A GPU (Graphics Processing Unit) is the component inside your computer responsible for everything you see on screen — games, videos, your desktop, all of it. It works extremely hard, especially during gaming or video editing.

When a GPU starts to fail, the signs can range from subtle (a few coloured dots on screen) to dramatic (your PC refusing to start at all). The good news is that most problems can be identified at home using free tools — and this guide shows you exactly how.

No experience needed. Every step in this guide is written in plain English. We explain every term as we go. Take it one step at a time and you will be fine.

---

Common Symptoms of a Faulty GPU

Before running any tests, read through this list and note anything that sounds familiar. The more symptoms you recognise, the more likely your GPU is the problem.

🔴 High Severity — Act Immediately

Screen Artefacts (Dots, Lines, or Strange Colours)
Random coloured dots, triangles, or corruption appearing on your screen — especially during games. This is often the first sign of GPU memory failure and should not be ignored.

Random Crashes or Blue Screen of Death (BSOD)
Your PC suddenly freezes or restarts, sometimes showing a blue error screen. If this happens mainly during games or GPU-heavy tasks, the graphics card is a prime suspect.

🟠 Medium Severity — Investigate Soon

Black Screen on Startup
Your PC turns on (fans spin, lights come on) but the screen stays completely black. This often means the GPU has stopped sending a signal to your monitor.

GPU Fan Making Loud or Strange Noises
Grinding, rattling, or squealing sounds from your PC. Alternatively, the fans may have stopped spinning entirely — causing dangerous overheating.

🟡 Low Severity — Keep an Eye On It

PC Overheating During Light Tasks
Getting very hot just browsing the web suggests the GPU’s cooling system is struggling — usually dried-out thermal paste or blocked fans.

Games Running Much Slower Than Usual
A sudden drop in performance — low frame rates, stuttering — without any changes to your system. Often caused by the GPU throttling itself due to heat damage.

Display Driver Crashes (Screen Flickers Briefly)
Windows shows the message “Display driver stopped responding and has recovered.” This is your GPU’s software crashing — a common early warning sign.

---

Step-by-Step Diagnosis — No Tools Needed

Work through each step in order. After each one, check if the problem goes away. If it does, you have found the cause. If not, move to the next step.

⚠️ Safety first: Always shut down completely and unplug from the wall before touching any internal components. Touch a metal part of your PC case to discharge static electricity before handling the GPU.

Step 1 — Check Your Monitor and Cables

Make sure your monitor cable (HDMI, DisplayPort, or DVI) is firmly plugged in at both ends. Try a different cable if you have one. Also check the cable is going into the GPU ports on the back of your PC — not the motherboard ports above them.

Step 2 — Restart Your PC Fully

A proper restart (not sleep mode) clears temporary glitches in your display driver. Many driver-related problems disappear after a full shutdown and restart. If you have been using sleep mode, try this first.

Step 3 — Check for Overheating

Download HWiNFO64 (free from hwinfo.com) and look for your GPU temperature. Idle temperature should be below 50°C. Under load during gaming, below 85°C is normal. Above 90°C under load is a serious problem.

Step 4 — Check the GPU Fans Are Spinning

Look at your graphics card while running a game or heavy task. The fans must spin under load. Many modern GPUs do not spin at idle — this is normal. But if they never spin at all, the fans may have failed.

Step 5 — Remove and Reseat the GPU

Power off and unplug your PC. Open the side panel. Gently remove the GPU from its slot by releasing the clip at the end of the slot. Blow out any dust. Push the GPU firmly back in until you hear a click. Reconnect all power cables to the card.

Step 6 — Test in a Different PC (or With a Different GPU)

If you have access to another PC, try your GPU in it. If the problem follows the GPU to the new system, the card is faulty. If a friend’s working GPU fixes your PC, your original GPU is the problem.

---

Free Software to Test Your GPU

These tools are used by professional repair technicians worldwide. They are all free, safe to download, and easy to use.

GPU-Z — techpowerup.com/gpuz
Shows detailed information about your GPU — model, temperature, memory size, and clock speeds. Use it to confirm your GPU is being detected properly by Windows.

MSI Afterburner — msi.com/Landing/afterburner
Monitor GPU temperature, fan speed, and usage in real time while gaming. Shows a live graph so you can see exactly how hard your GPU is working and how hot it is getting.

FurMark — geeks3d.com/furmark
Stress tests your GPU by pushing it to 100% load. Run it for 5 to 10 minutes — if the PC crashes, freezes, or shows artefacts, your GPU or its cooling has a problem. Stop immediately if temperature exceeds 95°C.

DDU — Display Driver Uninstaller — guru3d.com
If you suspect a driver issue, DDU completely removes your graphics driver so you can install a fresh copy. This often fixes software-related GPU problems instantly.

---

How to Test GPU Memory

GPU memory (also called VRAM) errors are one of the most common causes of artefacts and crashes. If your screen is showing dots, lines, or corruption — testing the VRAM should be your next step.

Important: Unlike the general tools above, dedicated GPU memory testing software is not available on Google or any public website. It is shared privately within repair technician communities — primarily on Discord servers run by professional GPU repair technicians. Even then, the versions available on Discord often contain errors and require significant technical knowledge to clean up and prepare before use.

We have put together video guides showing you how GPU memory testing works for both Nvidia and AMD cards.

Testing GPU Memory on Nvidia Cards

⚠️ Important note for Nvidia users: The Nvidia GPU memory testing software only works on systems with an Intel CPU. If you have an AMD Ryzen CPU paired with an Nvidia GPU, this software will not work on your system.

Watch our video guide on how Nvidia GPU memory testing works:

Fixing Memory Errors on AMD Cards

AMD graphics cards have their own dedicated memory testing process. Watch our video guide covering AMD GPU memory errors:

💾 The Easiest Way to Test GPU Memory — Our Memory Testing USB

Because GPU memory testing software is not publicly available, and the versions found on Discord require technical knowledge to clean and prepare, we created a solution for everyday users.

Our Memory Testing USB is a professionally prepared, bootable diagnostic tool that is ready to use straight out of the box. Here is what makes it different:

• ✅ Not available anywhere else — the software cannot be downloaded from Google or any public website
• ✅ Cleaned and error-free — unlike versions found on Discord, ours has been professionally cleaned of all errors
• ✅ No technical knowledge needed — plug in, boot up, and test. No setup, no fixing errors, no Discord hunting
• ✅ Supports both Nvidia and AMD — covers the full range of graphics cards
• ✅ Supports our channel — every purchase directly supports the GPU Solutions YouTube channel and helps us create more free guides like this one

Skip the Discord hunt. Get a professionally cleaned, ready-to-use Memory Testing USB from our shop. View it here →

---

Diagnosing and Fixing GPU Overheating

Overheating is the single most common GPU problem we see at GPU Solutions. The good news is it is also one of the most fixable. The two main causes are dried-out thermal paste and failing fans — both of which can be fixed without replacing the card.

What Temperature Is Too Hot?

• Idle (desktop use): Below 50°C is normal
• Under load (gaming): Below 85°C is normal
• Under load: 85–90°C — Warning sign. Clean the GPU and monitor closely
• Under load: Above 90°C — Serious problem requiring immediate attention

Watch: How to Fix Overheating Issues on a GPU

Our video guide covers the most common causes of GPU overheating and walks you through how to fix them:

Watch: How to Replace Thermal Pad and Paste on a GPU

If your GPU is consistently running too hot, replacing the thermal paste is often the solution. This video shows you exactly how to do it safely and correctly:

---

What to Do Based on Your Results

After working through the steps above, you will likely fall into one of these four situations:

✅ Problem Solved

The issue was a driver problem, a loose cable, or overheating due to dust. Clean your GPU every 6–12 months, keep drivers updated, and monitor temperatures going forward. No further action needed.

🌡️ GPU Is Overheating

If the GPU consistently exceeds 85°C under load, the thermal paste has likely dried out. Watch our thermal paste replacement video above — it is a straightforward fix that can dramatically lower temperatures and extend the life of your card.

⚠️ Artefacts and Crashes Continue

If the GPU still shows artefacts or crashes under any conditions after trying the steps above, the VRAM or GPU chip itself may be failing. This requires professional repair. Contact GPU Solutions — we repair a wide range of Nvidia, AMD, and Intel GPU models.

❌ GPU Not Detected At All

If the GPU does not appear in Device Manager and cannot be resolved through software, contact us before spending money on a replacement. Many cards that appear completely dead can be brought back to life with professional repair.

---

Quick Reference — Symptom Lookup Table

Use this table to quickly find your symptom and the recommended first action.

Symptom	Most Likely Cause	First Step to Try
Coloured dots or lines on screen	Failing VRAM	Run FurMark; test GPU memory
Black screen on boot	No signal from GPU	Check monitor cable and GPU seating
PC crashes in games only	Overheating or driver fault	Check temps in MSI Afterburner
Blue screen (BSOD)	Driver crash or failing GPU	Reinstall driver using DDU
Loud fan noise	Fan bearing failing	Check fans are spinning freely
Slow performance in games	Thermal throttling	Check GPU temperature under load
Driver keeps crashing	Corrupt or outdated driver	Use DDU and reinstall fresh driver
GPU not detected	Poor seating or dead GPU	Reseat GPU; test in another PC
Overheating constantly	Dried thermal paste or blocked fans	Replace thermal paste; clean fans
Memory errors on AMD GPU	VRAM fault	Watch our AMD memory error video above

---

Need More Help With Your GPU?

GPU Solutions is based in Dubai and specialises in diagnosing and repairing Nvidia, AMD, and Intel graphics cards. Whether your card has artefacts, overheating issues, or simply will not turn on — we can help.

• 💾 Memory Testing USB — professionally cleaned, error-free, ready to use straight out of the box
• 🛍️ Visit our shop — digital diagnostic tools and repair guides
• 📺 Watch more repair videos on our YouTube channel
• 📧 Contact us for professional GPU repair in Dubai