Corsair RM750i: Review| Test| Specs | Pros & Cons | Config | Setup | CPU

Test – Corsair RM750i – Conseil Config: Specs | Price | CPU Performance| Config | Advantage (Pros) and Disadvantages (Cons) and other important features that will help you make better decision.

Contents hide

1 The bundle consists of:

2 Modular cables

3 Specification: Corsair RM750i

4 The test platform

5 The test protocol

6 The power supply has been tested against:

11.1 Where to find the Corsair RM750i?

11.2 Related posts:

Today it is a Corsair power supply which goes through the mill with a model of the RM series which has just been created, I named the RM750 i ! The main objective of this series is silent operation, in addition to having a very low consumption thanks to the 80Plus Gold certification, available in 4 versions (650W, 750W, 850W and 1000W) it is the 750Watts version which will be the guinea pig of the day.
What do we have on the program? Operation of the hybrid fan (fan off below a certain temperature), fully modular, 100% Japanese certified 105 ° capacitors, possibility of switching to single / multi rail mode, a 7-year warranty as well as compatibility with the the Corsair Link brand (hence the i). Offered at around € 130 for the 750Watts model, let’s see what the beast has in its belly!

The facade is rather sober, a white background and yellow bands, a photo of the power supply is present as well as the model, the power and the various logo of guarantees and certification 80Plus Gold. There is also a small listing of the different strengths of the power supply, certification, Japanese capacitors, the possibility of switching from multi rail to single rail mode and compatibility with Corsair Link software.

At the back of the graphs representing the efficiency as well as the sound level according to the load, we can see that the RM750i will be in fanless mode up to around 300 Watts. Also present a table of the power distribution, the 12V alone delivers the full power for which the power supply is sold, namely 750 Watts.

On the side a listing of all the available connectors, we notice the 4 PCIe 6 + 2-pin connectors which will allow to make an SLI / Crossfire as well as the 8 Sata connectors to store photos / vacation movies en masse.

At the opening of the box we find the manual placed on a thick foam containing the power supply, on the right the bag of modular cables.

under this thick foam the beast reveals itself a little more, but not too much given that it is in its small velvet bag, nothing is too beautiful!

The bundle consists of:

1 Corsair RM750i power supply
4 fixing screws
1 sticker Corsair
A handful of cable ties
1 power cord
Modular cables
Manuals

Corsair therefore offers a complete bundle, with everything you need to plug in the beast, no frills here, it is a power supply after all .

It seems that the honeycomb-shaped grids have not really been the order of the day for some time, Corsair offers a grid made up of parallel lines, a bit like prison bars! Under this grille the 135mm fan with FDB bearings of the brand. The build quality here is excellent, there is really nothing to say.

Below is a sticker indicating the make, model, the various checks carried out as well as obviously a power distribution table, this can always be used!

The two sides are identical with the presence of a good big sticker recalling the brand and the model, we would not want the power supply to pass for another model!

A very classic rear end with a honeycomb grid covering almost all of the space, it is clear that the heat dissipation will be done without the slightest problem. Ah yes, a small label reminding the model, you never know, in case you haven’t seen it on the sides (or below!).

The interesting part, modular connectors! 4 for Sata and Molex peripherals, 3 for PCIe and CPU (2 PCIe connectors per cable) as well as the eternal 24-pin. On the left side, the connection for monitoring via the Corsair Link software, either by the top connector to a Corsair Commander box for example or by the USB connector just below. A button is also present to test the fan, the power supply being hybrid the fan will not run at low load so this will be a way to be reassured.

Corsair continues the adventure of RM models with CWT here, the build quality is very good and all the capacitors are Japanese.

The fan is therefore a Corsair NR135P, 135mm with a maximum consumption of 2.64Watts for around 1500 RPM.

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Modular cables

Corsair RM750i
24-pin	61 cm
4 + 4-pin (Processor)	65 cm
8-pin (6+2) PCIe + 8-pin (6+2) PCIe	60 + 15 cm
8-pin (6+2) PCIe + 8-pin (6+2) PCIe	60 + 15 cm
Sata + Sata + Sata + Sata	55 + 10 + 10 + 10 cm
Sata + Sata + Sata + Sata	40 + 10 + 10 + 10 cm
Molex + Molex + Molex + Molex	45 + 10 + 10 + 10 cm
Molex + Molex + Molex	45 + 10 + 10 cm
Molex -> FDD	10 cm
Molex -> FDD	10 cm
C-Link USB Cable	80 cm
C-Link I2C Cable	80 cm

The connectivity of the Corsair RM750i is undoubtedly very complete, in addition to the eternal 24-pin and 4 + 4-pin processor there are 4 PCIe 6 + 2-pin connectors as well as a plethora of Sata and Molex. In addition to all this Corsair has found it necessary to provide not 1 but 2 FDD adapter (floppy drive, I would remind you), which can do the most can do the least I imagine. The cables used for the Corsair Link software are also present, both 80cm long.
Speaking of length, all the cables will be able to adapt to a large tower without problems, 61cm for the 24-pin, 65cm for the 4 + 4-pin as well as 60 + 15cm for the PCIe, there will be no problem. to connect all components.
A quick word on the cables themselves, usually brands opt for either flat cables or “normal” cables but covered with a braid, Corsair has chosen to make a little mix to its sauce by providing flat cables for everything peripheral and braided for 24-pin, 4 + 4-pin as well as PCie cables. The build quality of all these little people is excellent, by the way, we are clearly not in the low end.

Specification: Corsair RM750i

Corsair RM750i
Power	750 Watts for + 12V 150 Watts for + 3.3V and +5 V combined 15 Watts on + 5Vsb 9.6 Watts on -12V
Certification
Maximum yield	90% / 92% / 89% at 20% / 50% / 100% load
Fan	Corsair NR135P
Sound level	Fanless at less than 300Watts load 20 dB max at 100% load
Modular	Yes 100%
Protections	OCP, OVP, UVP, SCP, OPP, OTP
Number of 12v rails	1 of 62.5A or 5 of respectively 40A, 40A, 40A, 40A, 40A
Dimensions	180 x 150 x 86 mm
Format	ATX
Weight	1.93 kg
MTBF	100,000 hours at 50 °
Capacitors	100% Japanese certified at 105 °
Guarantee	7 years
Price	~ 130€

As we can see Corsair equips its beast with a good package of Watts on the 12V, we expected no less! In single rail mode there are 750 Watts available (62.5A) while in multi rail mode we are entitled to 5 rails of 40A each. Quite honestly, if a multi rail power supply can have an interest on really heavy it is more than limited on a power supply like this, especially when we see a single 62.5A rail for 40A multi rails, but good anyway. way that won’t change how the beast works 😀

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80Plus Gold certification as I said with a maximum efficiency of 92% at 50% load, this will clearly help the power supply to release the minimum heat and therefore the need for cooling will also be less, which is always good for the nuisances sound. Speaking of the cooling requirement, it will be provided by a brand NR135P, 135mm equipped with an FDB (Fluid Dynamic Bearing) bearing for a maximum speed of 1500RPM (which should logically not happen anyway).

The dimensions are more important than the “standard” power supplies, going from 16cm to 18cm in length, so you have to be careful if it has to be installed in a small box. In terms of weight, we are average for this type of product with 1.93kg, nothing out of the ordinary.

Offered at a price of 130 € it can be really very interesting because Corsair has given it a 7-year warranty as well as 100% Japanese capacitors and an MTBF of 100,000 hours but given for 50 ° (which is very clearly not the case with everyone, being satisfied with 40 °, see even 25 °).

Before proceeding to the tests, a quick word on the part devoted to the power supply in the Corsair Link software, it will be possible to see the performance in real time, the voltages, the input / output consumption as well as the internal temperature of the unit. power and fan speed. The fan speed can be left in default mode or else modified for a fixed value (minimum 40%), of course if the internal temperature rises the fan will follow its default ventilation curve so as not to damage the beast. It is also here that we can switch from multi rail mode (by default) to single rail mode.

The test platform

The Corsair RM750i power supply has been tested on the configuration below:

Processor : Intel Core i7 875K @ 3.2 Ghz
Motherboard : Asus P7P55D
Mémoire: Kingston HyperX 4 x 2 Go 1600Mhz
Disque dur: WD Raptor 150 Go
Graphics card : Sapphire Toxic 5850

The test protocol

The core i7 875K has been slightly overclocked to 3.2Ghz. The readings in charge were taken during an OCCT Power Supply test, the readings at rest were taken after 15mins on the desk.

The power supply has been tested against:

Antec Edge 650 (tested here)
be quiet! Dark Power Pro 11 850 (tested here)
be quiet! E9 580CM (tested here)
be quiet! L8 Pure Power 500 (tested here)
be quiet! Straight Power 10 500 CM (tested here)
Corsair CS450M (tested here)
Seasonic S12 600 (de 2006)
Seasonic G550 (tested here)
Seasonic X650 (v1 de 2010)
Seasonic X650 KM3 (tested here)
Seasonic P660 (tested here)
Seasonic Platinum 460FL (tested here)
Silverstone NightJar 520 (tested here)
Silverstone SX500-LG (tested here)
Silverstone SFX SX600-G (tested here)
Silverstone Strider Essential 600 (tested here)
Silverstone Strider Plus 600 (tested here)
Silverstone Strider S 1500 (tested here)
Silverstone SX-600 G (tested here)
XFX TS-550 Bronze (tested here)

The consumption

Before starting, let’s take a look at the performance of the power supplies compared to the Corsair RM750i, indeed the different 80Plus certifications will directly influence consumption, so this will be a good way to have concrete results. Only the S12 600 does not have an 80Plus certification because it did not yet exist at the time of purchase (but the following versions of this power supply had the classic 80Plus certification, so 80% / 80% / 80% to 20% respectively / 50% / 100% load).

As we can see the 80Plus Gold certification is clearly not usurped here, we are almost at the level of the 80Plus Platinum power supplies in the comparison! At rest the RM750i consumes 75 Watts while under load it goes up to a small 347 Watts, really very good for 80Plus Gold. As usual, the power supply is clearly not pushed to this last corner with the test setup, but it represents what is done in a high-end configuration designed for gaming today, so what 99% of users are likely to pull at the outlet.

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Note that the consumption was recorded at the outlet for the complete configuration, under load for example and on the 347 Watts “drawn” to the socket the components only consume about 324 Watts of the 750 Watts available.

The tensions

No worries about voltage stability, the Corsair RM750i holds everything without flinching with a 3.3V which goes from 3.36V to 3.34V, the 5V from 5.1V to 5.05V and the 12V from 12.2V to 12.15V, as much to say that the beast is very stable, without arriving at the level of stability of the more high-end power supplies of the comparison (but the prices are of course not the same!).

For the moment, we are very good with the Corsair in today’s test, but the real sinews of war are in the level of noise pollution, indeed who would like a low-consuming power supply with excellent voltages but who is breaking your ears? Corsair sells the silent operation of its RM power supplies, hybrid ventilation, components chosen to have as little Coil Whine as possible, let’s see what that gives!

Noise pollution

Warning: Part to be taken with a grain of salt, unfortunately not having access to the appropriate equipment and using an android application to take the readings The measurements below are only indicative! The readings were taken 15cm from the feed.

Okay, well I think the mass is said, the fan of the RM750i simply did not start even after 2 hours of OCCT Power Supply, as much to say that the sound level remained of course at a lower level than that. ambient! By tilting the ear we can detect a very slight electronic noise, but quite honestly who remains the ear glued to his food? As soon as you move at 15cm no more trace of any noise.

Here we are at the end of this test, what to say about the Corsair RM750i?
Corsair updates its RM platform by adjusting a few things here and there, the warranty goes from 5 years to 7 years, the operating temperature under maximum load goes from 40 to 50 °, we keep the hybrid ventilation mode of course and compatibility with Corsair Link software is added. The build quality is really very good, as usual we see that Corsair takes care of the aesthetics of its products, whether in terms of paint, materials used or look.
The performance thanks to the 80Plus Gold certification is excellent, the voltages are very stable and the RM750I will not be heard in the vast majority of gamer config thanks to the hybrid ventilation mode.

A quick word on the little extras of the new version of the RM series, the multi rail mode is ultimately only a very gadget and will not be useful in 99% of cases. Compatibility with the Corsair link software will allow you to have an eye on the behavior of the power supply, namely efficiency, fan speed, internal temperature and voltages, for those who already use the software it is a small more who can be sympathetic.

Offered at a price of around € 130, the RM750i from Corsair ultimately has a lot of assets for them without being overpriced, a power supply that will therefore be a very good choice for those who need a lot of Watts but cannot afford to take a very high end diet.