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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThe AcBel Polytech iPower 660 is not a 660 W continuous power supply: its label specifies 610 W continuous and 660 W peak. More importantly, Hardware Secrets’ 2008 test found that the sample shut down under sustained loads as temperature rose, including at 378 W. It is a poor choice for a modern PC or a used-PSU purchase; consider it only for historical interest or a low-load legacy system after professional inspection.
What the iPower 660 is—and what “660” means
AcBel Polytech’s iPower 660 is also identified as PS2/660 and PC7016. AcBel is an original-equipment manufacturer associated with products sold under other brands, but that background does not establish the quality of this particular model. Hardware Secrets reviewed the unit on May 13, 2008; its review page was updated February 24, 2023. The age of any individual unit depends on its production date, but surviving examples are from an old platform.
The model name is not its continuous wattage rating. The review’s label and specifications identify 610 W as the maximum continuous output and 660 W as peak output. A peak figure is not a suitable target for sizing a PC that must run reliably under sustained load. Hardware Secrets’ specifications and its power-distribution analysis document the distinction.
Specifications and connectors
| Item | Published information |
|---|---|
| Continuous / peak output | 610 W continuous / 660 W peak |
| Standard | ATX12V 2.3 |
| Efficiency | 80% claimed; 79.4%–84.5% measured by Hardware Secrets at 115 V across its reported load tests |
| Power factor correction | Active PFC |
| Motherboard and CPU power | One 20/24-pin motherboard connector; two ATX12V connectors that form an EPS12V connection |
| GPU power | Two 6-pin PCIe connectors |
| Other connectors | Seven peripheral connectors, four SATA power connectors, and one floppy-drive connector |
| Protection reported in testing | OCP, OPP, and SCP operated in the review’s tests |
| Warranty and present availability | Warranty listed as N/A in the review; current official warranty, retail availability, and support for this exact model are not verified |
| Historical price | About $120–$130 was an anticipated U.S. price in 2008, not a current valuation |
The review describes three virtual +12 V rails: +12V1 serves the motherboard, peripheral, and SATA connections; +12V2 serves the two ATX12V connectors and one GPU connector; +12V3 serves the other GPU connector. The reviewer considered the distribution adequate but noted that the preferred GPU cable was not identified for a single-card setup. The GPU connectors are separate 6-pin plugs, but there is no native 8-pin PCIe or 12V-2×6 connector. Compatibility therefore depends on the specific graphics card and its approved cabling; wattage alone does not make the unit a practical match for a modern GPU.
#1 Best Overall
- 80 PLUS Bronze certified, with 85% efficiency or higher under typical loads
- Single 12V. Rail with DC-DC Converter to improve 3.3V/5V stability
- Active Power Factor Correction (PFC)
- Heavy-duty protections, including OVP (Over Voltage Protection), UVP (Under Voltage Protection), OCP (Over Current Protection), OPP (Over Power Protection), SCP (Short Circuit Protection), and OTP (Over Temperature Protection)
Most wiring was reported as 20 AWG, while ATX12V wiring was 18 AWG. The reviewer considered 20 AWG a poor choice for a supply in this output class, particularly for auxiliary GPU power. Sleeving was present but did not extend into the PSU housing. These are limitations to consider alongside the dated connector set and ATX12V 2.3 platform.
What the load test found
The decisive weakness was sustained operation as temperature increased. In Hardware Secrets’ laboratory test, the sample passed the first two load patterns, then shut down during each of the higher-output patterns. The reviewer estimated that it could sustain about 350 W at 45 °C. That estimate applies to the tested sample and methodology; it is not a guarantee that every iPower 660 will fail at exactly that output.
| Test | Output and share of 610 W | Room temperature | PSU temperature | Efficiency | Reported result |
|---|---|---|---|---|---|
| 1 | 126.9 W / 20.8% | 43.6 °C | 50.9 °C | 82.9% | Pass |
| 2 | 247.5 W / 40.6% | 45.2 °C | 50.1 °C | 84.5% | Pass |
| 3 | 378.2 W / 62.0% | 46.1 °C | 50.4 °C | 82.8% | Failed after about three minutes |
| 4 | 491 W / 80.5% | 46.1 °C | 50.4 °C | 81.7% | Failed after about 10 seconds |
| 5 | 613.7 W / 100.6% | 46.1 °C | 50.4 °C | 79.4% | Failed after about five seconds |
After cooling, the sample lasted about two minutes at the 491 W pattern before shutting down when the room reached approximately 40 °C. The findings show why a brief power-on or a short, cool test does not establish that a supply can deliver its label rating continuously in a warm case. Hardware Secrets’ results are from one sample and its own test conditions. The full load-test report includes the test patterns, temperatures, shutdown observations, electrical measurements, and protection tests.
Rank #2
- Delivers 600W Continuous output at plus 40℃. Compliance with Intel ATX 12V 2. 31 and EPS 12V 2. 92 standards
- 80 PLUS Certified – 80% efficiency under typical load. Power good signal is 100-500 millisecond
- Supports (2) PCI-E 6 plus 2pin Connectors. Active (PFC) Power Factor Correction, MTBF: 100, 000 hours
- Industry Grade Protections: (OPP) Over Power Protection, (OVP) Over Voltage Protection, (SCP) Short Circuit Protection
- Hold up time is 16 millisecond minimum within 60 percent load. Input frequency range 50 - 60 in Hz
Voltage regulation, ripple, and protections
The iPower 660 was not uniformly poor. Hardware Secrets measured all outputs within 3% of nominal voltage during its reported tests, better than the review’s cited ATX tolerances of ±5% on the main positive rails and ±10% on −12 V. Ripple and noise stayed within the limits cited by the review, although +12 V ripple approached its limit at full load.
| Rail at the 610 W test point | Reported peak-to-peak ripple | Limit cited by the review |
|---|---|---|
| +12V1 | 98.9 mV | 120 mV |
| +12V2 | 95.2 mV | 120 mV |
| +5 V | 25.8 mV | 50 mV |
| +3.3 V | 15.2 mV | 50 mV |
The review also reports over-current protection shutting the unit down when draw from an individual +12 V rail exceeded approximately 21 A, over-power protection operating during heavier load tests, and short-circuit protection working on +5 V and +12 V. Functional protections are a positive feature, but they do not offset the thermal result or establish the condition of a different, aged unit.
What the internal design tells us
Hardware Secrets’ teardown found two GBU605 primary rectifier bridges in parallel without a heatsink. On the secondary side, it identified three STPS20S100CT Schottky rectifiers for +12 V and one SBR30A40CT rectifier for +5 V. The +3.3 V output used a regulator arrangement connected to +12 V rather than a separate conventional secondary rectifier. The reviewer’s component analysis raised concerns about current and thermal headroom for the claimed output; those theoretical calculations are the reviewer’s analysis, not an independent diagnosis of the exact shutdown mechanism.
That distinction matters: the measured result is the tested sample’s high-temperature shutdown behavior. The component discussion offers context for why the reviewer questioned the design margin, but it should not be treated as proof that a particular component alone caused the failure. The teardown is documented in the primary-side analysis and secondary-side analysis.
Is it suitable for a PC today?
Low-power retro system
It may be kept for historical interest or considered for a low-power legacy computer that does not need modern GPU connectors, but only as a compromise. Any continued use should follow inspection and testing by a qualified technician; do not treat a successful startup as proof of health. Back up data and avoid relying on the system for critical work.
Old mid-range gaming PC
The thermal test gives little basis for confidence under sustained gaming loads, and its limited 6-pin GPU connections can restrict compatibility. Its age adds uncertainty about component condition even if the specific review sample performed well on voltage regulation. A current replacement is the prudent choice.
Rank #4
- For S30 Workstation Power Supply 610W FSA034 54Y8844 54Y8905
Modern gaming PC or daily-reliability system
Do not use this as the replacement PSU for a modern gaming build. Many current GPUs require connectors it does not provide natively, and a model name or nominal wattage cannot establish compatibility, transient capability, or sustained thermal performance. Follow the GPU and system manufacturers’ power requirements and choose a current PSU with appropriate native cabling, independent test results, and a suitable warranty.
Should you buy one used?
No, not for normal PC use. The original review’s projected U.S. price of $120–$130 was from 2008, and it is not a guide to present value. A second-hand unit may have unknown operating hours, storage conditions, or component wear. An approximately 18-year-old PSU also carries general age-related risks, including deterioration that cannot be ruled out from appearance alone; the review did not measure a defect in every surviving unit.
- Avoid listings that describe 660 W as continuous output or do not show the label clearly.
- Do not accept “tested” as meaningful unless the seller explains what was tested; a power-on check is not a sustained-load assessment.
- Do not buy one with damaged, missing, or unidentified cables, or visible damage, fan noise, burning odor, unstable startup, or random shutdowns.
- Do not pay a working-PSU premium for an unverified example. At most, treat it as salvage or a collectible, not a dependable modern component.
Choosing a replacement
Do not replace it by matching the number in the model name. First check the graphics card’s power requirements, the case’s PSU form factor and length limits, device connector needs, and the system’s sustained and transient demand. Prefer a current product with independent electrical testing, suitable native GPU cables, adequate thermal capability, and a warranty available in your region. Avoid relying on improvised adapters where a suitable native connector is available.
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- for S30 workstation power supply 610W FSA034 54Y8844 54Y8905
For example, current product families include the Corsair CX650 and semi-modular CX650M, a Gold-rated fully modular Corsair RM650, Seasonic’s CORE GX family, and be quiet!’s Pure Power 13 M. These are examples to compare, not universal recommendations: verify the exact model, connector inventory, availability, and requirements for your own build. The manufacturers’ information is available for the Corsair 650 W range, Corsair ATX power supplies, Seasonic CORE GX datasheet, and be quiet! Pure Power 13 M datasheet. Prices and stock vary by region and date; no current price for the AcBel model is established.
Verdict
The iPower 660 has good measured voltage regulation, active PFC, and protections that operated in the review, but those positives do not make it a sound 610 W continuous supply. Its tested thermal endurance was the deciding weakness, and its age and dated connectors make it unsuitable for a modern gaming PC. Keep it as a historical artifact or, cautiously, for low-load legacy use—not as a current replacement PSU.
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