Thermaltake Dockpower FI 1000W: A Power Supply With Sockets That Leave the Case

By Indie Kings | September 26, 2026

Updated September 26, 2026: Thermaltake's new Dockpower FI 1000W does something no power supply in our coverage has done before: it puts every modular socket on a separate dock that stays in the case when you swap the main unit, so the cables never have to be unplugged from anything. That is a genuinely useful idea for a cramped chassis. The measurements are more mixed. The unit meets Cybenetics Platinum efficiency and LAMBDA A- noise at both 115V and 230V, yet Hardware Busters places it near the bottom of its 26-unit comparison, and the 140mm fan never stops because there is no semi-passive mode.

Verification note: All figures below are from Hardware Busters' review of the Thermaltake Dockpower FI 1000W, published September 26, 2026 by Aris Mpitsos. Efficiency and noise figures are the published Cybenetics evaluations, quoted as certified. The ranking within the reviewer's comparison is their result, attributed as such. We do not have the full metric breakdown behind that ranking, and we have not inferred one: the certifications are strong while the placement is weak, which means the metrics that decided it are not the two quoted here. Price is as listed by Thermaltake USA at $159.99, checked September 26, 2026. No other pricing is quoted and no retailer links are included.

Image: Thermaltake Dockpower FI 1000W. Credit: Hardware Busters.

The docking architecture, and why anyone would want it

The Dockpower FI splits a power supply into two physical pieces, and the reason is worth understanding before anything else.

On a normal modular supply, the sockets are on the PSU chassis itself. Every cable you want to use plugs into the unit, and the cables then run out of it into the case. The modular design exists so you are not forced to run unused cables into a tight space behind the motherboard tray, which is a real problem in a compact chassis and an aesthetic problem in a glass-sided one.

Thermaltake moves the sockets off the chassis entirely. A separate dock module carries all of the modular connectors, plugs into the main unit through a gold-plated edge connector, and locks down with a D-ring screw. You wire your cables into the dock once, and that arrangement is independent of the PSU itself.

The practical consequence is that if you ever replace the main unit, the dock and every cable plugged into it can stay exactly where they are. In a case with a very short cable run, or a densely routed back side, that removes genuinely tedious work. It is the first time we have covered a power supply built around that idea.

It is a new line rather than a one-off. Dockpower FI covers 750W, 850W, 1000W and 1200W, in black and in white, which the company calls Snow. This review covers the 1000W.

The risk it does not remove

There is a specific hazard attached to modular power supplies, we have covered it before, and the docking architecture does not address it. It arguably makes it more relevant.

Modular supplies have per-connector pinouts that differ between units and between wattages. Fitting a cable from one modular supply into the socket of another can destroy the cable, the supply, or both. We reported a be quiet 850W unit that died after fifteen years of service because a cable from a different unit was connected to it. That is not a hypothetical failure mode or a warranty argument, it is a documented death of a working unit caused purely by a modular connection being wrong.

The Dockpower FI's pitch is that you can keep a dock and its cables in place while changing the main unit. That is exactly the situation in which a mismatched cable or socket can occur, because the natural assumption becomes that whatever was in the dock still fits whatever arrives to replace the supply. Anyone adopting this design should treat the part number of the dock as something to verify against the replacement unit rather than assume continuity.

It is also worth being clear that the Dockpower does nothing about the failure mode that has produced most of our coverage. A 12V-2x6 cable melting at the connector is a matter of sustained high current through a specific contact, and it happens on supplies with a fixed, non-modular 12V-2x6 lead just as readily. Moving the sockets to a dock does not change the current, the contact, or the thermal path.

What the measurements actually say

The published figures are strong on both headline metrics, which makes the reviewer's placement more interesting rather than less.

Two details in that table are worth pulling out.

A 600W 12V-2x6 on a 1000W supply is the correct way to do it. The connector is rated for 600W, which is what a single high-end GPU draws at the top of its range, and the supply has 1000W to give. Cable and supply are matched rather than the cable being asked to carry the unit's full output.

The low power mode support matters more than it sounds. The unit lists both alternative low power mode and Intel C6 and C7 state support, which is how a system stays in a low draw state without the supply dropping out. On a design with no semi-passive fan mode, that is the only route to quiet at idle, and it is worth confirming it behaves as intended in a given case.

The cable set is individually jacketed rather than sleeved, which suits the black and white colour options but will not match a build that expects full custom sleeving. Lengths are conventional: 540mm ATX, 700mm EPS, 600mm on the 12V-2x6.

Good certifications, poor placement

Here is the part that does not add up, and it is the most important thing in the review.

Hardware Busters states that several below-average results keep the Dockpower FI 1000W near the bottom of its 26-unit comparison. That is the reviewer's overall verdict, and it sits oddly against the two numbers above, because Platinum efficiency and an A- noise rating are good results by any standard.

Both things can be true at once. A supply can be efficient and quiet at the loads the noise and efficiency certifications measure, and still perform poorly on the metrics those certifications do not cover, which typically means transient response, voltage regulation and hold-up time. Those are exactly the behaviours that produce instability and unexpected shutdowns under load rather than a unit that merely runs inefficiently.

We do not have the full breakdown that produced the ranking, so we are not going to guess at which metric failed. What can be said is that the headline certifications should not be read as a summary judgement, and that a buyer who cares about load transient behaviour should go and read the full evaluation rather than rely on either this article or the badge.

There is a broader point here too, and it applies to the whole 1000W ATX 3.1 category. Certification tells you about efficiency and about noise. It does not tell you how a supply behaves when a 5090 drops from a graphics-limited frame to a loading screen and back. A full Cybenetics evaluation does, and every unit in this category has one published.

The fan that never stops

The 140mm fan is a sleeve-bearing Yate Loon part, and on this unit it spins at all loads. There is no semi-passive mode.

For most 1000W builds that is a deliberate and sensible trade. A supply in this class is asked to move 600W to a graphics card, and stopping the fan is how units end up boiling. Noctua's own reported research direction makes the same argument from a different angle, and the fan here is specified at 0 to 40 degrees C continuous full load rather than in some aspirational figure.

It does mean the Dockpower FI is the wrong choice for a silent build, and the LAMBDA A- rating does not change that, because A- describes how quiet the fan is when running, not whether it runs. Anyone building quiet and should note that the noise certification and the absence of a stop mode are two separate facts about this product.

Sleeve bearing is also the cheaper bearing type. It is entirely adequate for a fan that runs continuously rather than cycling, but it is a small quality step below a fluid dynamic bearing in a part sold at this price.

The rest of the range and the wider review set

Two things make this more useful than a single unit review.

The Dockpower FI line covers 750W, 850W, 1000W and 1200W in black and white, so the architecture is a range decision rather than a single product. And Hardware Busters maintains a deep ATX 3.1 review library, including a Thermaltake AX 3200W ATX 3.1, the Toughpower PT 850, 1000 and 1200, a Lian Li SX1000P, a Gigabyte AE1000PM PG5, an FSP VITA PM 1000W, an MSI MAG A1000PLS, an Antec GSK 1000W, an ASRock Steel Legend SL-1000P, a Cougar GR 1000W and a be quiet! Dark Power 14, alongside a full Cybenetics test database.

That matters for a specific reason. This site has very little power supply coverage relative to how much it covers GPUs, and the reason has not been that power supplies are uninteresting. It is that reviewing them properly requires sustained load testing across voltages, which is a discipline rather than a news cycle. A source that does it consistently is worth more to this coverage area than another ten GPU launches.

Who should buy this

The Dockpower FI 1000W is a good fit for a specific buyer and a poor fit for a different one, and the price and architecture are the two things that decide it.

At $159.99 with a ten year warranty, a Platinum efficiency certification and a 600W 12V-2x6 as standard, it is inexpensive for a 1000W ATX 3.1 unit, and the docking architecture is a real convenience in a cramped or tightly routed case.

It is a poor fit if you are building a silent system, because the fan never stops, or if you care most about load transient behaviour, because the reviewer's own comparison places it near the bottom and the reason is not in the headline figures.

The modular docking deserves its own caution independent of the review score. If you buy one, keep the dock part number, and check it against any replacement unit rather than assuming a dock and its cables are interchangeable across the range.

FAQ

What is unusual about the Thermaltake Dockpower FI 1000W?
All of the modular sockets sit on a separate dock module rather than on the PSU chassis. The dock connects to the main unit through a gold-plated edge connector with a D-ring screw lock, so cables plugged into the dock can stay in the case when the main unit is replaced. It is the first power supply in our coverage built around that idea.

How efficient and quiet is it?
Cybenetics Platinum at both voltages, measured at 89.897% on 115V and 92.001% on 230V. Noise is Cybenetics LAMBDA A- at both, 29.31 dB[A] on 115V and 28.70 dB[A] on 230V. Hardware Busters places the unit near the bottom of its 26-unit comparison despite those figures, and attributes that to several below-average results in other metrics.

Does the fan stop?
No. It uses a 140mm sleeve-bearing fan and there is no semi-passive mode, so it runs at all loads. The unit does support alternative low power mode and Intel C6 and C7 power states, which is how the system stays in a low draw state. A LAMBDA A- rating describes how quiet the fan is while running, not whether it runs.

Does the docking design stop melted 12V-2x6 cables?
No. A melting 12V-2x6 connector is a function of sustained high current through that contact, and the Dockpower ships a 600W rated 12V-2x6 lead, which is the correct rating to pair with a 1000W supply. Moving the sockets to a dock does not change the current, the contact or the thermal path.

Is a modular power supply risky?
The specific risk is fitting a cable from one modular unit into the socket of another, since pinouts differ. We have covered a be quiet 850W unit that died after fifteen years because a cable from a different unit was connected to it. A design that encourages you to keep a dock and its cables in place while swapping the main unit is exactly where that mistake is easy to make, so keep the dock part number and check it against any replacement.

How much does it cost and what is the warranty?
$159.99 from Thermaltake USA, as checked on September 26, 2026, with a ten year warranty. The Dockpower FI line covers 750W, 850W, 1000W and 1200W in black and white, so the architecture is available across the range rather than as a single product.

Bottom Line

The interesting thing about this power supply is the architecture, and it is interesting in a way that has nothing to do with wattage. Thermaltake has taken the modular sockets off the chassis and put them on a separate dock that stays in the case when the main unit is replaced, which means a builder in a cramped chassis never has to unplug and re-route twenty-four cables to swap a supply. That is a real, practical improvement and it is the kind of thing this site has not covered before. What the measurements say is more mixed, and the mix is the story. Platinum efficiency and an A- noise rating are good results, and yet the reviewer still places the unit near the bottom of a twenty-six-unit comparison because of several below-average results in metrics those badges do not measure. Both are true, and the useful conclusion is that certification covers efficiency and noise and does not cover how a supply behaves under a load transient, which is the failure that actually causes instability. We do not have the full breakdown and have not guessed at it. The other thing worth dwelling on is the fan, which never stops, because no semi-passive mode is fitted. On a thousand-watt unit that is the right call and the specification supports it, since a supply driving six hundred watts to a graphics card should not be cycling its fan. It also makes this the wrong choice for a silent build, and the A- rating should not be read as saying otherwise, because it describes how quiet the fan is while it runs rather than whether it runs. Finally there is a hazard the docking design does not address and arguably sharpens. Modular supplies have per-unit pinouts, and we have already reported a fifteen-year-old be quiet unit that died because a cable from a different supply was fitted to it. A design whose selling point is that you keep the dock and its cables in place across a swap is precisely where that error is likely to happen, so the honest advice is to keep the dock part number and check it against whatever replaces the unit. At $159.99 with a ten year warranty, a properly rated 600W 12V-2x6, low power mode support and a genuinely useful design idea, this is inexpensive and interesting. It is not the strongest thousand-watt unit in the reviewer's comparison, and the reason is not visible in the headline numbers.

Source: Hardware Busters, Thermaltake Dockpower FI 1000W ATX v3.1 PSU Review by Aris Mpitsos, September 26, 2026, including the published Cybenetics efficiency and noise evaluations

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