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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchChoose a power supply (PSU) by checking the exact graphics card’s recommended system wattage and required power connectors, then confirming the PSU can support your CPU and other components. The GPU’s own power draw is not the same as the recommended wattage for the entire PC.
Start with the exact graphics card’s PSU recommendation
Look up the full model name of the card you plan to use, including its manufacturer and variant. Check the GPU maker’s current specifications for recommended system power and required connectors. NVIDIA’s GeForce comparison table lists total graphics power and required system power separately. AMD’s RX 9000 quick reference guide similarly lists total board power, recommended PSU wattage, and connectors.
These figures answer different questions: total graphics or board power describes the card, while recommended PSU wattage is guidance for powering a system configuration. Don’t choose a PSU by adding the GPU’s stated power to an arbitrary amount, or by treating the GPU figure as the whole computer’s requirement.
Examples from manufacturer specifications
| Reference graphics card | Card power | Recommended PSU | Power connectors |
|---|---|---|---|
| Radeon RX 9070 XT (AMD, 2025) | 304 W total board power | 750 W | Two 8-pin |
| Radeon RX 9070 (AMD, 2025) | 220 W total board power | 650 W | Two 8-pin |
| Top model shown in NVIDIA’s GeForce comparison table (accessed 2026; live lineup) | 575 W total graphics power | 1,000 W required system power | Check the current model listing |
These are reference-model specifications, not independent test results or universal recommendations. NVIDIA’s comparison page is live and can change as models are added or updated. A board-partner card may have different power limits or connectors, so check the specifications for the exact card you intend to buy.
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- Apevia 700W Spirit ATX Gaming Power Supply with black sandblasted casing
- Supports Dual/Quad/Multi-core CPUs. Supports single 12V output for higher power usage.
- Connectors: 1 x 20/24pin Main Power, 1 x 4+4pin 12V, 2 x PCI 6+2pin, 4 x SATA, 4 x Peripheral
- Auto-thermally controlled 120mm black fan. Output: +3.3V@16A, +5V@20A, +12V@53A, -12V@0.5A, +5VSB@2.5A
- Heavy-duty protections: Short-Circuit/Over-Current/Over-Voltage/Over-Power/Under-Voltage/Over-Temperature Protections
Check that the PSU has the right cables
A PSU’s wattage rating does not tell you whether it has the connection your card needs. Compare the card’s connector requirements with the PSU’s included GPU cables and, if applicable, the adapter supplied with the card. NVIDIA’s comparison table lists 8-pin and PCIe Gen 5 cable options depending on model; AMD’s RX 9070 XT reference specification calls for two 8-pin connectors.
- Confirm the exact card’s connector count and type in its manufacturer specification.
- Check which GPU power cables are included with the PSU and whether the card’s supplied adapter is intended for those outputs.
- For a modular PSU, use only cables approved for that exact PSU model. Modular cables are not universally interchangeable.
- Do not assume that a connector name alone proves cable compatibility. PCI-SIG says 12V-2×6, defined in CEM 5.1, replaces 12VHPWR; this naming update does not make every PSU cable interchangeable. See PCI-SIG’s connector update.
Size the PSU for the whole PC
The GPU is often the largest factor in choosing a PSU, but the CPU and other components matter too. Check that the card maker’s system-wattage guidance makes sense for your actual build, rather than estimating from GPU power alone. A calculator can help account for components: Corsair’s PSU Calculator takes the CPU and other parts into account. It is a manufacturer tool, not an independent certification of a PSU choice.
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When comparing PSUs, use the card maker’s recommendation as the starting point and account for your complete configuration. A larger wattage number by itself does not establish better build quality or reliability.
Decide whether a GPU upgrade requires a new PSU
Not automatically. NVIDIA’s guidance for RTX 40 Series says a new PSU is not required if the existing unit already meets the wattage recommendations. That advice is specific to that guidance; it does not guarantee that every older PSU, cable arrangement, or GPU combination will work. For an upgrade, verify the existing unit’s capacity and exact model-approved cables against the new card’s requirements.
Rank #3
- 80 PLUS GOLD CERTIFIED
- 10-year limited warranty, guaranteeing long term reliable operation
- Fully modular design
- ATX 3.1 & PCIE 5.1
Check clearance and cable routing
Physical fit includes the power cable, not just the card itself. NVIDIA’s RTX 40 Series power guidance calls for at least 36 mm of clearance above the graphics card for power-cable bend and airflow. Treat that figure as guidance for the applicable RTX 40 Series cards, not a universal clearance rule; use the exact card’s instructions for other models.
Quick Recap
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- Adapts a single 8-pin PCIe power connection to dual 8-pin (6+2) slots, compatible with GPUs requiring multiple connectors
- Durable, high-performance design provides additional power to GPUs with a single 8-pin PSU connection
- Ideal for custom PC builds, offering a sleek look that keeps your setup clean and organized
- Efficiently splits one 8-pin connection into two 8-pin (6+2) connectors, ensuring stable power for high-demand GPUs
- Includes two adapters, offering flexibility for multi-connector GPUs or future upgrades, making it a cost-effective choice
Rank #4
- Function: Use the computer's SATA interface to power the graphics card.
- This product is one 8-pin PCI-E connector to 15-pin SATA (male) connectors, two of the pins can be detached to convert it into a 6 pin connector.
- Connecting a SATA power extension cable reduces the damage to the interface caused by continuous unplugging and also reduces the stress on the connector of the SATA drive or computer motherboard.
- SATA 15-pin male to 8-pin female adapter power supply for your graphics card. There is no need to upgrade your existing SATA power supply to use PCI Express graphics cards.
- The Sata 15-pin to 8-pin adapter is a perfect solution foshortness of PCIe power connectors on your motherboard. Connect your graphics card with the PCIe 6-pin power connector to the SATA 15-pin power supply in your computer host.
A practical PSU compatibility checklist
- Identify the exact card. Find the manufacturer and full board-partner model, not just the GPU family name.
- Read its power guidance. Record the recommended system wattage and the card’s required connectors from the manufacturer’s specifications.
- Check your complete build. Account for the CPU and other components; use a calculator as an estimate if helpful.
- Inspect PSU cables. Confirm the correct connectors are available, and verify that any modular cables are approved for the exact PSU model.
- Confirm physical routing. Make sure the case allows the cable to reach and bend as the card manufacturer specifies.
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