Sorry, we just need to make sure you're not a robot. For best results, please make sure your browser is accepting cookies. Show Type the characters you see in this image: Try different image Conditions of Use Privacy Policy © 1996-2014, Amazon.com, Inc. or its affiliates The Straight Power 11 Platinum model with 550W max power is silent, achieves satisfactory overall performance and uses quality parts. The performance difference with the previous model is small, though. Pros
Cons
Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test. The new Straight Power 11 Platinum model with 550W max power has a small overall performance difference with the previous Gold model, despite the new platform that FSP used. To make matters worse, it uses an inferior 5VSB circuit, with notably lower efficiency levels. The competition is hard with the Fractal Design Ion+ 560P and the Seasonic Focus Platinum model with similar capacity being better choices. The Corsair RM550x, our best power supply pick in the 550W category, also achieves higher performance despite the lower efficiency certification in the 80 PLUS scheme (in Cybenetics, both the RM550x and the Straight Power 11 Platinum 550 have the same efficiency rating, ETA-A). There are two Straight Power (SP) 11 lines in be quiet's portfolio right now, one with Gold-certified members and capacities ranging from 450W to 1000W and one with Platinum models and 550W up to 1200W max power. We don't know, yet, if the older Straight Power 11 line will remain in the market, or will be replaced by the new one. For the moment, both are listed on the brand's official page. Besides the different min and max capacities of their models and the efficiency certifications, another significant difference between the SP Gold and Platinum lines is the new platform that the new models utilize. The OEM remains FSP, which uses a fresh design featuring a full-bridge topology instead of the half-bridge that the older models used. Moreover, only the SP Platinum 550W model is equipped with a single EPS connector, with all the rest featuring two of those connectors. In the SP Gold line, the 450W, 550W, and 650W models come with a single EPS connector. Image 1 of 8 be quiet! Straight Power 11 550W Platinum Product Photos(Image credit: Tom's Hardware) The Straight Power 11 Platinum with 550W max power is the smallest member of the line. It features a fully modular cable design along with a high-quality Silent Wings 3 fan, which uses a fluid dynamic bearing for lower noise output and increased lifetime. According to be quiet!, the funnel-shaped fan inlet increases the airflow, boosting the cooling performance. Moreover, all the internal components are of high quality, including Japanese capacitors that belong to good lines and not mainstream ones. Image 1 of 6 be quiet! Straight Power 11 550W Platinum Product Photos(Image credit: Tom's Hardware) SpecificationsSwipe to scroll horizontally Manufacturer (OEM) FSP Max. DC Output 550W Efficiency 80 PLUS Platinum, *ETA-A (88-91%) Noise *LAMBDA-A++ (<15 dB[A]) Modular ✓ (Fully) Intel C6/C7 Power State Support ✓ Operating Temperature (Continuous Full Load) 0 - 40°C Over Voltage Protection ✓ Under Voltage Protection ✓ Over Power Protection ✓ Over Current (+12V) Protection ✓ Over Temperature Protection ✓ Short Circuit Protection ✓ Surge Protection ✓ Inrush Current Protection ✓ Fan Failure Protection ✗ No Load Operation ✓ Cooling 135mm Fluid Dynamic Bearing Fan (BQSIW3-13525-MF) Semi-Passive Operation ✗ Dimensions (W x H x D) 150 x 85 x 160mm Weight 1.66 kg (3.66 lb) Form Factor ATX12V v2.4, EPS 2.92 Warranty 5 Years * Not certified yet by Cybenetics. According to our measurements, which are in line with the Cybenetics respective guidelines, the PSU falls into these efficiency and noise categories. Image 1 of 3 be quiet! Straight Power 11 550W Platinum Product Photos(Image credit: Tom's Hardware) Power SpecificationsSwipe to scroll horizontally Rail 3.3V5V12V112V212V312V45VSB-12VMax. PowerAmps22221818202030.3 45.8 Row 2 - Cell 0 Watts110 549.6153.6Total Max. Power (W) 550 Row 3 - Cell 9 Power DistributionSwipe to scroll horizontally RailConnectors12V1ATX, Peripheral12V2EPS12V3PCIe112V4PCIe2 Cables and ConnectorsSwipe to scroll horizontally DescriptionCable CountConnector Count (Total)GaugeIn Cable CapacitorsATX connector 20+4 pin (600mm)1116-22AWGNo4+4 pin EPS12V (700mm)1116AWGNo6+2 pin PCIe (600mm) 2218AWGNoSATA (550mm+150mm+150mm+150mm)1418AWGNoSATA (550mm+150mm+150mm) / 4-pin Molex (+150mm)13 / 118AWGNoSATA (550mm+150mm) / 4-pin Molex (+150mm+150mm)12 / 218AWGNoFDD Adapter (150mm)1122AWGNoAC Power Cord (1360mm) - C13 coupler1118AWG- There is no need for two EPS connectors in such a low-capacity power supply. The amount of PCIe is sufficient and the same goes for the peripheral connectors. It is weird to see 16AWG gauges in a 550W PSU, but we won't complain, of course, since they allow for lower voltage drops. It is just that the production cost slightly increases, with those cables. Finally, all cables are quite long and the distance between the peripheral connectors is adequate. Image 1 of 9 be quiet! Straight Power 11 550W Platinum Cable Photos(Image credit: Tom's Hardware) Component AnalysisWe strongly encourage you to have a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss. Swipe to scroll horizontally Header Cell - Column 0 General DataManufacturer (OEM)FSPPCB TypeDouble SidedRow 2 - Cell 0 Primary SideTransient Filter5x Y caps, 2x X caps, 2x CM chokes, 1x MOVInrush ProtectionNTC Thermistor (SCK-018)Bridge Rectifier(s)1xAPFC MOSFETs2x ROHM R6020KNX (600V, 20A, 0.196Ohm)APFC Boost Diode1x Infineon IDH04G65C6 (650V, 4A @ 150°C)Hold-up Cap(s)1x Rubycon (450V, 220uF, 3,000h @ 105°C, MXK) & 1x Rubycon (450V, 180uF, 5,000h @ 105°C, VXH)Main Switchers4x STMicroelectronics STF18N60M2 (650V, 8A @ 100°C, 0.28Ohm)IC Driver 2x Silicon Labs Si8233BD APFC ControllerChampion CM6500UNXResonant ControllerChampion CM6901XTopologyPrimary side: Full-Bridge & LLC converter Secondary side: Synchronous Rectification & DC-DC convertersRow 14 - Cell 0 Secondary Side+12V MOSFETs4x Infineon BSC014N04LS (40V, 100A @ 100°C, 1.4mOhm)5V & 3.3VDC-DC Converters: 8x Advanced Power AP3R303GMT (30V, 25A @ 70°C, 3.3mOhm) PWM Controllers: 2x ANPEC APW7164Filtering CapacitorsElectrolytic: 4x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 2x Nippon Chemi-Con (5-6,000h @ 105°C, KZH), 4x Rubycon (3-6,000h @ 105°C, YXG), 1x Rubycon (6-10,000h @ 105°C, ZLH) Polymer: 4x FPCAP, 18x United Chemi-ConSupervisor ICWeltrend WT7527 (OCP, OVP, UVP, SCP, PG)Fan Modelbe quite! BQ SIW3-13525-MF (135mm, 12V, 0.4A, Fluid Dynamic Bearing Fan)Row 20 - Cell 0 5VSB CircuitRectifier1x Silan Microelectronics SVF3N80F FET (800V, 1.9A @ 100°C, 4.8Ohm)Standby PWM ControllerLeadtrend LD7750R Image 1 of 5 be quiet! Straight Power 11 550W Platinum Overall Photos(Image credit: Tom's Hardware) This is FSP's new platform, which we will soon see in the Hydro PTM Pro line. It uses a full-bridge topology on the primary side, along with an LLC resonant converter for increased efficiency. The secondary side includes the usual: a synchronous design for the +12V rail and voltage regulation modules for the minor rails. The parts that FSP used are of high quality, especially the bulk caps, and the design is clean, without any cables obstructing the airflow. The increased clearance between the parts also enhances the airflow. Only the DC-DC converters are installed side by side, but those parts are not highly stressed in real-life conditions, and they use several FETs, which share the load. Image 1 of 6 be quiet! Straight Power 11 550W Platinum Transient filter(Image credit: Tom's Hardware) The transient filter is complete and does a pretty good job, according to our test results. (Image credit: Tom's Hardware) Since the PSU's capacity is low, there is no need for a pair of bridge rectifiers. Nonetheless, two bridges could increase efficiency, especially under high loads. Image 1 of 6 be quiet! Straight Power 11 550W Platinum APFC converter(Image credit: Tom's Hardware) The APFC converter uses two ROHM FETs and an Infineon boost diode. The bulk caps are provided by Rubycon and are of extra-high quality. This is the first time we see a 5000h bulk cap on a desktop PSU. Usually, even high-end platforms use 2000h bulk caps. Finally, the APFC controller is a Champion CM6500UNX IC. Image 1 of 5 be quiet! Straight Power 11 550W Platinum Main FETs and primary transformer(Image credit: Tom's Hardware) The four STMicroelectronics FETs are installed on a full-bridge topology. An LLC resonant converter is also used to restrict switching losses. The primary FETs are controlled through a pair of Si8233BD drivers. Image 1 of 2 be quiet! Straight Power 11 550W Platinum 12V FETs and VRMs(Image credit: Tom's Hardware) All four FETs that regulate the +12V rail, are installed on the solder-side of the PCB. The DC-DC converters that generate the minor rails are hosted on two vertical daughter-boards, which are installed side-by-side. Image 1 of 3 be quiet! Straight Power 11 550W Platinum Filtering caps(Image credit: Tom's Hardware) There are not many electrolytic caps, since FSP used a large number of polymer ones. Still, the few electrolytic caps are of high quality. Image 1 of 2 be quiet! Straight Power 11 550W Platinum 5VSB(Image credit: Tom's Hardware) The 5VSB circuit uses a SVF3N80F FET on its primary side, and the standby PWM controller is provided by Leadtrend. Weltrend WT7527 Supervisor IC (Image credit: Tom's Hardware) The supervisor IC is a Weltrend WT7527 which supports, out of the box, all necessary protection features, but OTP (Over Temperature Protection). Image 1 of 3 be quiet! Straight Power 11 550W Platinum Modular board front(Image credit: Tom's Hardware) The face of the modular board hosts several polymer caps. Image 1 of 3 be quiet! Straight Power 11 550W Platinum Soldering quality(Image credit: Tom's Hardware) The soldering quality is average, since in some areas the soldering joints look sloppy. Nevertheless, this won't affect performance. Image 1 of 3 be quiet! Straight Power 11 550W Platinum Cooling fan(Image credit: Tom's Hardware) The cooling fan uses a fluid dynamic bearing and it is driven by a highly-relaxed speed profile. MORE: Best Power Supplies MORE: How We Test Power Supplies MORE: All Power Supply Content Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
how can it be both; + FORCompatible with the alternative sleep mode & - AGAINSTNot compatible with the alternative sleep mode ?? this is an obvious error. It IS compatible with the alternative sleep mode. Already asked to fix this. ReplyAris_Mp chaz_music said: Hi Charles, and thank you for your comments. The hold-up time is almost identical between 115V and 230V. The change is in the inrush current. I agree with you, the hold-up time is of immense importance. CL ripple graph in page 3, I cannot find anything out of order. If you have any suggestions on how to improve the Cybenetics methodology, they always hear opinions and are ready to make changes, if those are for the best. About efficiency, diodes have lower voltage drops at increased temperatures as well, and this plays a major role especially in bridge rectifiers. Thank you for the other two points you mention. Indeed the cost of dealing with the added thermal load of lower efficiency PSUs is significant. Is be quiet pure power 11 FM good?The be quiet! Pure Power 11 FM 550 achieves impressively high performance! It not only takes the lead from the popular Corsair RM550x, but it also surpasses the digital Cooler Master V550i Gold! The more expensive Straight Power 11 550 is also left notably behind, in overall performance. Is Straight Power 11 good?Straight Power 11 is the better unit according to the community tier list, but it's a multi-rail only. So very high power draw GPUs might trip the OCP feature more due to it being a multi-rail. Is the be quiet straight power 11 Platinum 850 W any good?Came well packaged and has every possible cable you would need for power. Fully modular so you only plug in and use the cables you need. Super quiet, I can't even hear the thing, but typically you wouldn't hear the PSU fan anyways with case fans overpowering audible levels typically. I have this paired with a be quiet! Is be quiet pure power 11 500w good?Pure Power 11 is 80 PLUS Gold certified with an efficiency rating of up to 92% – a truly outstanding level for this class of PSU. The most compelling benefit: lower power consumption and consequently lower costs, and cooler, quieter operation. |
