Overview PSU Corsair RM750: full-bodied gold

Overview PSU Corsair RM750: full-bodied gold


    Today we introduce our readers with interesting design and features a 750-watt power supply RM750 known company Corsair Memory.

    Currently, a family of power supplies Corsair RM are six models ranging from 450 to 1000 W, and for each of them characterized by several key features – high efficiency level 80PLUS Gold, fully modular design cables segment workload completely silent (no fan rotates as unnecessary), as well as a unique port Corsair Link software to monitor fan speed and power modes of the system.

    All this, coupled with an interesting design, the original low-profile design of modular cables, a powerful single +12 V power rail and quite adequate for the products in this category, price makes RM750 or other units of this series is quite an attractive option to build a sufficiently powerful gaming system or graphic station on one or two cards.

    Our present task is a detailed study of trends and practical test for confirmation of the manufacturer’s specifications. With their tradition and begin.

    Specifications of Modular PSU Corsair RM750

    • Cable economy: Modular
    • Rated Power: 750 W
    • Peak Power: 825W
    • Shutdown: Switch; Auto (logic ATX)
    • Cooling system: 140 mm fan Corsair NR135L with low noise (23 dBA) mode Zero RPM (40% load) and controlled using a temperature sensor
    • Input parameters: 100-240, 5/10 A, 47-63 Hz
    • Claimed efficiency: Certification 80PLUS Gold (92%)
    • Conformity: ATX 12V 2.31, SSI EPS 12V 2.92, Energy Star 5.0, ErP Lot 6 2,013, WEEE, RoHS
    • Output parameters: +5 V 25,0 A; +12 V 62.5 A; -12V 0,8 A; +5 VSB 3,0 A; +3.3 V 25,0 A
    • Distribution of load: +3.3 V +5 V lt; 150 W; +12 lt; 750 W
    • Protection of output voltage: Overload (OCP), overvoltage (OVP), short-circuit (SCP), overload power (OPP), overheating (OTP)
    • PFC (Power Factor Correction): Active, PFgt; 0,99 typical load
    • Safety Certifications: FCC, ICES, CE, C TUV US, RCM, TUV, CB, CCC, BSMI, GOST, ROHS, WEEE, ROHS, KC, TUV-S
    • Dimensions: 150x86x180 mm
    • Corsair Link Technology: Monitoring the fan speed and current consumption at +12 V
    • MTBF (MTBF): Not less than 100 thousand hours
    • Manufacturer’s Warranty: 5 years
    • Price: $ 130 [easyazon_cta add_to_cart=”default” align=”none” asin=”B00EB7UITQ” cloaking=”default” height=”28″ key=”small-orange” localization=”default” locale=”US” nofollow=”default” new_window=”default” tag=”gadgethelp-20″ width=”120″]

    If comment characteristics to the above features are also worth adding a very small stated noise even at full load, a full set of protection technologies, as well as an impressive warranty.

    Package and Design

    In the retail model Corsair RM750 comes in the original two-layer packing: inside informative design “cover” is tight box made of corrugated cardboard.

    Includes power supply, power cable, a set of modular cables, mounting kits and ties, instruction manual and warranty card.

    Layout PSU Corsair RM750 traditional models with modular cabling and a big fan, seem unusual except that the beveled corners of the body – however, it is unlikely to have an impact on anything except the design.

    Outer end of the body with a connector for the power cable and switch completely closed decorative “honeycomb” grille, a small piece which “otela” inlay logo RM750.

    On the opposite plane, completely devoid of the vents are all the connectors for the modular cables and signaling port C-Link (Corsair Link).

    The lower plane is fully reserved for the big 140-mm fan, which, in turn, took two grilles – linear and concentric circles.

    Cable Industry

    For the author of this article has always remained a mystery technical meaning of performance of the principal, and the 24-pin CPU, 8-pin cables in the form of a removable because they are no options are needed in any configuration. Except that, as in the case with beveled edges housing for aesthetic reasons.

    Anyway, PSU Corsair RM750 detachable cables are all, without exception. The kit includes:

    • One 24 (20 +4)-pin power cable motherboard length of 610 mm;
    • One 8 (4 +4)-pin processor power cable length of 650 mm;
    • Two cables with four 8 (6 +2)-pin PCI-E 750 mm length;
    • Cables for connecting peripherals, in the amount of 7-type connectors Molex, 8 SATA connectors and one connector for a floppy drive.

    All the cables have a flat, low profile design, so that the skilled in the gasket during installation can maximize the circulation of air within the housing.

    Ventilation and circuitry

    Look inside and consider carefully any components. However, here the developers PSU Corsair RM750 decided soriginalnichat so usual in such cases, curly (“Phillips”) screwdriver will put aside – need special hexagonal screwdriver bits.

    Seven-bladed fan system has its own name – Corsair NR135L. According to the specifications of the fan blades have an optimized profile for near-silent operation, even at full speed.

    Nominal fan current is 0.22 A, and the noise level of the order of 6.0 dB is stated at 20% load, 12.4 dBA at 50% load and 23.0 dBA at a 100% load.

    In view of the fact that the mode ZERO RPM (load up to 40%), the fan is not turning at all, and the maximum fan speed Corsair NR135L set at about 745 rev / min, so silent mode is quite realistic. Schedule fan speed depending on the load of the system, provided by Corsair, below. Note to about 40% load the fan does not rotate.

    From the standpoint of performance circuitry model Corsair RM750 can be called a classic of modern PSU with a high efficiency level 80PLUS Gold and Platinum: single-ended primary transformation large denomination capacitor 470 uF 420 V, separate modules DC-DC conversion in the secondary circuit, separate same charge protection.

    Mounting tight, but execution will not carp. Manufacturer further emphasizes the use of high-quality capacitors and soundly executed winding elements to provide a low noise level.

    Add a few words about the system hardware and software monitoring Corsair Link. Necessary for its operation hub Corsair Link, which connects to the aforementioned connector on the power supply and the USB port on the system board.

    With this solution, you can monitor in real time the fan speed and the current consumed by the +12 V.

    As the hub Corsair Link is an optional element, bought separately and not included PSU, check his work in practice, it has not happened.

    Test Procedure

    Since the release of our latest reviews PSU testing technique used in the laboratory Gadget Help, has not changed. Become familiar with it in its entirety can be, for example, in this article. Schedule, according to a study compiled by the efficiency of the test power supply contains benchmarks for standards family 80PLUS, as well as minimum requirements for a basic standard ATX12V version 2.2.

    Test results

    Fill in the parameters of a load test stand according to the label model.

    Judging by the stated power supply unit Corsair RM750 maximum load, our test bench for maximum load on the +12 V of the order of 60 A, almost cope with this task. Below are diagrams for dynamic cross-load testing, where as a result of operating voltages deviated by no more than 2%.

    During static tests with manual settings throughout the range of workloads for plotting efficiency was added some margin the load via the +3.3 V and +5 V power supply to check not only on the nominal load of 750 watts, but at the peak – 825 watts.

    In the chart below, for example, is a screenshot of a stress test with energy consumption 804.25 W (power input at the same time is about 840 W). Corsair RM750 model successfully keeps this load quite a long time (over 25 minutes) without any critical components overheating, so about 24/7 for the nominal 750 W can say with full confidence.

    Graph with measurements of efficiency model Corsair RM750 below. The results fully satisfy the requirements of the standard 80PLUS Gold, which is certified by this power supply, as in most of the load range – namely the one where the most likely, and will be operation RM750, – well exceed these requirements, leaving almost stable in the range of 70 horizontal -105% load.

    This “behavior” of the graph can be partly explained by a significant margin, which is put in power supplies to meet the 80PLUS certification in a very wide range of supply voltages, from 100 to 240 (control are 110 and 230).

    However, to the credit of Corsair, our schedule obtained by practical measurements of real characteristics at mains voltage about 221 proved even more optimistic that the indicative timetable that leads manufacturer in its documentation.


    [easyazon_block add_to_cart=”default” align=”right” asin=”B00EB7UITQ” cloaking=”default” layout=”top” localization=”default” locale=”US” nofollow=”default” new_window=”default” tag=”gadgethelp-20″]At the time of writing, the power supply Corsair RM750M offered in online retail at a price of about $ 130 – $ 200. And it is – not “bronze” is very real 750W with efficiency level 80PLUS Gold, great design, quality performance, low noise (including silent portion) and a fully modular low-profile cable.

    PSU Corsair RM750, definitely well worth the money requested for it. And in general, I would like to draw your attention to a whole lot of Corsair RM: even among similar characteristics tempting offers a choice of one of these models – given the necessary power for your needs – can be called a very deliberate decision.

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