Member Avatar for slasham

Hi,
I recently bought a palit nvidia geforce 620 graphics card and im having trouble getting it to work. I plugged it intothe motherboard and the computer works but the graphics card fan spins realfast and is very loud. When i plug my power cable in however (pcle) the fan slows to a sensible speed and becomes quiet but the computer wont boot.
What am i doing wrong? I am a rookie so please dont expect me to know everything.
thankyou.

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  • Latest Post Latest Post by thrillride01

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A concise expert addendum that complements the thread and helps anyone who finds this page later.

The actual cause reported by was the display cable being on the motherboard's integrated video instead of the new GPU — a very common oversight. The other replies from and correctly steered the discussion toward power and compatibility; those checks are still useful when the symptom is “card fan spins loudly, system won’t boot” because similar symptoms can come from bad connections or PSU protection kicking in.

Practical checklist (safe, ordered checks that catch most problems):

  • Visual + safety: power off and unplug the system, ground against ESD, then confirm the monitor cable is connected to the GPU’s DVI/HDMI/DisplayPort output (not the motherboard).
  • PCIe power: ensure any required 6/8‑pin PCIe power plugs are fully seated, use the cables that came with the PSU (avoid Molex-to-PCIe adapters when possible), and do not hot‑plug those connectors.
  • Seating and slot: reseat the card, remove any plastic slot covers behind the GPU, and verify the retention clip is engaged.
  • PSU checks: wattage alone is not the whole story — quality and +12V rail amperage matter. If the system fails to power with the GPU hooked up, try booting with a known‑good, higher‑quality PSU.
  • BIOS/POST: set primary display to PCIe/PEG or disable integrated graphics, watch POST LEDs/beeps, and try a minimal-boot (one RAM stick, no extra drives).
  • Isolation: if possible test the GPU in another system or test a known working GPU in this system to isolate card vs. motherboard/PSU.

Note: GPU fans can spin fast before the card is initialized; that alone isn’t proof of failure. The installation order that avoids many headaches: power off/unplug → seat card → connect PCIe power → attach display to GPU → power on → enter BIOS to confirm display device.

Recommended Answers

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Member Avatar for rubberman

These graphics cards are very power hungry. Assuming your system still works when you remove the card, you need to verify that your power supply is adequate for the system + video card. If not, then you will experience the symptoms you are getting.

Member Avatar for slasham

It says it needs 300w and I have a 520w psu. The computer works fine when it's not plugged into the psu.

Member Avatar for thrillride01

Are you sure you are reading the requirement correctly? Does the Video card need a dedicated 300 watts for its own operation? There are some cards out there that need mega wattage just to run themselves. If this is the case, then that only leaves 220w for the rest of your computer to run off of. It would help us find the issue if you listed your loadout and the brand and model number of your vid card and PSU.

Member Avatar for slasham

Thankyou for your help :) My cable was plugged into the integrated video and not the graphics card. Stupid mistake

Member Avatar for thrillride01

LOL, we all make them from time to time!

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