Internal Power Cables Price Comparison 2026
Compare 442 internal power cables from Corsair, Silverstone & be quiet! — find the best price across UK retailers in one place.
Internal power cables are one of those components that builders tend to underestimate — until a cable doesn't reach, a connector doesn't fit, or a cheap sleeve starts melting under load. We've catalogued 442 products across this category, and the spread tells a story: most buyers spend somewhere around 6 £, but the range runs from a basic 2 £ SATA adapter all the way to industrial-grade Rittal harnesses pushing well beyond 8 £.
The market splits fairly cleanly into two worlds. On one side, you have the PC enthusiast segment — sleeved extension kits from Corsair, Cablemod, and Phanteks designed to make a build look as good as it performs. On the other, there's the professional and industrial side: Rittal and DeLOCK dominate here, supplying server rooms and data centres with certified, high-amperage cables that prioritise safety margins over aesthetics. StarTech.com and Akasa sit comfortably in the middle, offering reliable adapters and splitters at prices that rarely raise an eyebrow.
One thing our data makes clear: Silverstone punches well above its weight for volume, with 37 products averaging a very reasonable price point — making it arguably the most practical brand for builders who want quality without the Corsair premium. Meanwhile, Nanoxia leads the catalogue by product count but at a significantly higher average, reflecting its focus on premium sleeved sets for high-end builds.
Connector compatibility is the single biggest pitfall in this category. A 12VHPWR (or 12V-2x6) cable for a modern RTX 40-series or RX 7000-series GPU is not interchangeable with a standard PCIe 8-pin — and getting it wrong can damage your graphics card. Similarly, if you're routing power inside a SATA setup or managing a rack with power cables across multiple units, the length and conductor gauge matter as much as the connector type. Don't just buy the cheapest option — check the AWG rating and certifications first.
For those building or upgrading a PC, the wire connectors category is worth a look alongside this one. And if you're sourcing for a rack or server environment, bear in mind that IEC C13/C14 cables from Lindy or Rittal are a different product class entirely — longer, heavier, and rated for continuous load in ways that consumer PC cables simply aren't.
How to Choose the Right Internal Power Cable
With prices spanning from pocket change to several hundred pounds, picking the wrong internal power cable isn't just a waste of money — it can be a genuine safety risk. The connector type, conductor gauge, and certification matter far more than the colour of the sleeve. Here's what to focus on.
Connector type and compatibility
This is non-negotiable. An ATX 24-pin motherboard connector, an EPS 8-pin CPU connector, a PCIe 6+2-pin GPU cable, and a 12VHPWR (12V-2x6) cable for next-gen GPUs are all completely different — and none are interchangeable. Before buying anything, identify exactly what your PSU outputs and what your components require. The 12VHPWR standard in particular has had well-documented issues with poorly-seated connectors causing fires; only buy from reputable brands like be quiet! or Corsair for this connector, and always ensure it's fully seated.
Conductor gauge (AWG) relative to load
The AWG number works inversely — lower AWG means thicker wire and higher current capacity. For a GPU power cable carrying 150W or more, you want 16 AWG or better (lower number). A cheap 18 AWG cable on a high-draw component will run warm and degrade over time. For low-current applications like SATA power to an SSD, 18 AWG is perfectly adequate. Always cross-reference the cable's rated amperage against your component's actual draw — this information is usually in the product specs or the PSU manual.
Length: neither too short nor too long
Cable length is a surprisingly common mistake. Too short and you're straining the connector — a mechanical stress point that can cause intermittent faults. Too long and you're stuffing excess cable behind the motherboard tray, which restricts airflow and looks untidy. Measure the internal routing distance in your case before buying. Most standard PC builds are well served by 0.3 m to 0.5 m extensions; full-tower cases or rack-mounted systems may need 1 m or more. Rittal's 3 m cables, for instance, are designed for cabinet-to-cabinet runs, not desktop builds.
Sleeved extensions vs. direct replacements
There are two distinct product types here. Sleeved extension cables (Corsair, Cablemod, Phanteks, Nanoxia) plug between your existing PSU cables and the motherboard/GPU — they're purely cosmetic upgrades that add colour and a cleaner look. Direct replacement cables are designed for modular PSUs and replace the stock cables entirely, which can improve airflow and reduce clutter. If your PSU isn't modular, you can only use extensions. Don't buy a replacement cable for a non-modular PSU — it won't connect.
Safety certifications for industrial and mains-connected cables
For IEC C13/C14 mains cables (used in servers, rack equipment, and some desktop setups), certifications are essential — not optional. Look for CE marking as a baseline, and ideally VDE or UL approval for anything carrying mains voltage continuously. Lindy and Rittal cables in this category carry appropriate certifications; unbranded alternatives from unknown suppliers often don't. RoHS compliance is also worth checking if you're procuring for a business. For standard internal PC cables (SATA, Molex, PCIe), CE and RoHS are the key markers.
90° angled connectors for tight spaces
A right-angle (90°) connector can make a meaningful difference in compact cases or when a GPU sits very close to the case side panel. The be quiet! 12V-2x6 90° cable is a good example — it routes the cable away from the card horizontally rather than pulling it straight out, reducing strain on the connector and improving clearance. That said, angled connectors add a small amount of bulk at the plug end, so check you have the clearance before committing.
- Budget adapters and splitters (From 2 £ to 5 £) : At this end of the market you'll find SATA power splitters, Molex adapters, PWM fan splitters (like the ARCTIC PST Cable), and basic IEC mains leads from StarTech.com, kenable, Nedis, and Akasa. These are functional, no-frills components. Fine for low-current applications; don't use the cheapest options for high-draw GPU or CPU connections.
- The practical sweet spot (From 5 £ to 6 £) : This is where most builders should be shopping. Silverstone's sleeved EPS and PCIe cables, Lindy's IEC mains leads, and be quiet!'s 12VHPWR cable all sit here. Good build quality, proper certifications, and enough variety to cover most upgrade or replacement scenarios. Solid value for both PC builders and small server setups.
- Premium sleeved sets and modular replacements (From 6 £ to 8 £) : Corsair, Cablemod, Phanteks, and Nanoxia dominate this range with full sleeved cable kits for modular PSUs. You're paying for aesthetics, premium materials (nylon braiding, custom combs), and brand assurance. Thermaltake's higher-end modular cables also appear here. Worthwhile for a showcase build; overkill if the cables are hidden behind a shroud.
- Industrial and high-specification cables (Over 8 £) : Rittal's industrial power harnesses and high-specification DeLOCK cables occupy this territory. These are not PC enthusiast products — they're designed for server cabinets, industrial control panels, and data centre infrastructure where continuous load, temperature range, and certified safety margins are paramount. If you're here for a desktop build, you've taken a wrong turn.
Top products
- be quiet! 12V-2x6 / 12VHPWR 90° Cable PCI-E 0.7 m (be quiet!) : The standout choice for anyone connecting a modern high-end GPU. The 90° connector solves real clearance problems in mid-tower cases, and be quiet!'s build quality is genuinely reassuring for a cable carrying this much power. A must-compare if you have an RTX 40-series or RX 7000-series card.
- ARCTIC PST Cable Rev. 2 - PWM Sharing Cable for 4 Fans (ARCTIC) : Excellent value for builders who want to run multiple PWM fans from a single header without losing speed control. Does exactly what it says, costs very little, and ARCTIC's reputation in cooling accessories is well earned. Not glamorous, but one of the most practically useful cables in the category.
- Silverstone PP07-EPS8BR 0.3 m (Silverstone) : A tidy sleeved EPS extension at a fair price — Silverstone's sweet spot. The red sleeving won't suit every build, but the construction quality is solid and the 0.3 m length is right for most mid-tower cases. Good alternative to Corsair's pricier options if you just need a clean CPU cable.
- Corsair CC-8900244 internal power cable 0.3 m (Corsair) : Corsair's modular replacement cables are well made and look great, but you're paying a clear brand premium over Silverstone or Phanteks equivalents. Only worth it if you're building a full Corsair-sleeved setup for visual consistency — otherwise the price difference is hard to justify on a single cable.
- Rittal 2500.420 internal power cable 3 m (Rittal) : The most-offered product in the category, but context matters: this is an industrial cabinet cable, not a PC component. If you're managing server rack infrastructure or Rittal enclosures, it's a reliable, certified choice. If you found this while searching for a GPU cable, keep scrolling — it's not what you need.
Related categories
Frequently Asked Questions
What's the difference between a sleeved extension cable and a modular replacement cable?
A sleeved extension cable plugs between your existing PSU cable and the component — it doesn't replace anything, it just adds length and aesthetics. A modular replacement cable connects directly to a modular PSU's output socket and replaces the stock cable entirely. If your PSU is non-modular (i.e., all cables are permanently attached), you can only use extension cables — there's no socket to plug a replacement into.
Is it safe to use a cheap no-brand internal power cable for a GPU?
No — we'd strongly advise against it for GPU power connections, particularly 12VHPWR (12V-2x6). Undersized conductors, poor connector tolerances, and absent safety certifications are genuine fire risks under sustained GPU load. Stick to established brands like Corsair, be quiet!, or Cablemod for PCIe and 12VHPWR cables. For low-current applications like SATA to an SSD, budget options from StarTech.com or Akasa are generally fine.
What does AWG mean and which rating do I need?
AWG stands for American Wire Gauge — a lower number means a thicker, higher-capacity conductor. For GPU power cables (PCIe 8-pin or 12VHPWR), look for 16 AWG or lower. For CPU EPS cables, 18 AWG is the minimum, 16 AWG is better. SATA power cables are fine at 18 AWG since SSDs and HDDs draw relatively little current. Never use a cable with a higher AWG number than recommended for the application — it will run hot.
Do I need a special cable for an RTX 40-series or RX 7000-series GPU in 2026?
Yes, if your PSU doesn't already have a native 12VHPWR or 12V-2x6 connector. Most PSUs manufactured before 2022 will require an adapter or a dedicated cable. Be cautious with multi-connector adapters (4x PCIe 8-pin to 12VHPWR) — only use them if each 8-pin connector comes from a separate cable on the PSU, not daisy-chained from one. The be quiet! 12V-2x6 90° cable is a well-regarded option for this specific use case.
What's the point of a 90° angled connector — is it just cosmetic?
Not at all — it's primarily functional. A 90° connector routes the cable parallel to the PCB rather than pulling it straight out, which reduces mechanical stress on the port and can be essential in compact cases where a straight connector would foul the side panel. It also tends to look cleaner in windowed builds. The trade-off is a slightly larger footprint at the connector end, so verify clearance in your specific case before buying.
Can I use a Molex-to-SATA power adapter safely?
With caveats. Molex-to-SATA adapters are widely used and generally safe for low-draw devices like SSDs and optical drives. However, they're not recommended for high-draw SATA devices or for powering multiple devices from a single Molex connector. The Molex standard is also ageing — if your PSU still uses Molex as its primary output, consider whether the PSU itself is due for replacement. StarTech.com and DeLOCK make reliable adapters in this category if you do need one.
Are Rittal internal power cables suitable for a desktop PC build?
No — Rittal cables are industrial products designed for server cabinets, control panels, and rack infrastructure. They're overengineered and overpriced for a desktop build, and the connector types (IEC C13/C14, proprietary Rittal formats) won't match standard PC components. Their presence in this category reflects the breadth of the 'internal power cable' classification rather than any relevance to home or enthusiast PC building.