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My existing card is a ATI Radeon x600 Hypermemory PCI-X16

I want better games performance and have a budget of £150. My PC only has a 300w PSU and no PCI-X power connector so i need a low power card

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This thread from and illustrates two common choices when a desktop is power-limited: try a low-power video upgrade, or move to a different system. The checklist below focuses on evaluating a safe, low-draw GPU upgrade and on the practical checks that people often miss.

Start by measuring or estimating actual system draw under load (wall-watt meter or an online calculator). Compare that to the candidate card's power figure rather than marketing names — look up a card's TDP/specs before buying (TechPowerUp GPU Database). Remember a board can draw significant power from the motherboard slot itself; the slot spec limits how much is safe to rely on (PCI Express power details). Use a PSU calculator to estimate total system needs with the new GPU in place ().

Before installing: confirm the card does not require auxiliary connectors you lack; confirm physical clearance in the case; check driver support for your OS and motherboard firmware compatibility. Avoid temporary adapter hacks that pull large current through old Molex rails — they can overtax wiring. If a more powerful card is tempting, prioritize a quality PSU replacement (good rail amperage and efficiency) over cheap adapters.

After fitting a card, stress-test and monitor temps/power draw (tools like GPU-Z or HWMonitor are useful) and watch for system instability. If problems appear, revert to the previous GPU and re-evaluate the power budget or consider a PSU upgrade. These steps help decide whether a low-power upgrade is realistic or whether a system replacement is the safer long-term path.

Member Avatar for jbennet

Due to the power restraints i just ended up buying a new pc and a radeon x1950. Thanks anyway.

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