Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Once again we decided to take the test several models of one PSU power, but different price categories. On line 650-watt devices – Cooler Master G650M and V650. It is interesting to check whether they will be just as successful as the younger “brother.”

The total number of PSUs considered this category cardinality reached eighteen pieces , so that their opponents can find for each model and the competition promises to be sharp. We now turn to external examination.

Test participants

Review of Cooler Master G650M (RS-650-AMAA-B1)

Given the small difference in power is not surprising that the studied units Cooler Master were very similar in appearance. To avoid repetition, we will try to reduce the general descriptions and focus on the differences.

First revealed at the stage of consideration of the box – it was an inch longer than the low-end model G550M (275 x 195 x 110 mm).The size of the PSU is the same, the same applies to the scope of delivery. An interesting point – apparently, the company felt that a more powerful solution is needed and more solid packaging.

Design and information content – no difference. Packed device securely.

Package includes instructions, power cord and mounting screws.

In appearance the 550-watt G550M and G650M 650-Watt were almost indistinguishable – differ only in the numbers on the label.

Accordingly, the same dimensions and towers – 149 x 139 x 86 mm (standard ATX-format compatibility issues can not be afraid). But mass units differ quite markedly – G650M weighs 1620, the youngest model – 1425 This indicates a significant change in the filling, although both are built on the platform of BP production CWT.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Let me remind you that the device line for GM made partially modular scheme – cords with connectors periphery made optional.

Units are equipped with a standard seven-bladed fan size 120 x 25 mm.

The most interesting – power characteristics. Line 12 is not divided into the virtual channels on current can reach its 52 A.

Interestingly, in comparison with a younger model, an increase of 10 A – or 120 watts. Denomination also differs only 100 watts.Hence improve the performance “ratio of the power line 12 to the total capacity of the unit.” In this case, it reaches 96%, and G550M – only 91.6%.

The strength of the current lines of 3.3 V and 5 V 22 A. In the limited amount of them can be submitted up to 120 watts of power.The models of this line are certified according to the standard 80 Plus Bronze.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Check whether there are differences in the set of connectors. This unit is equipped with a composite connector ATX Mainboard 20 + 4-pin and the CPU 4 + 4-pin – are all the same. Cord length 550 mm and 600 mm.

But for the video card power connector provides just four PCI-e 6 + 2-pin (at G550M only two such connectors). This is a definite plus design, although the 650-watt units are rarely used in systems with a pair accelerators. Cord Length – 750 mm.

To power the periphery are encouraged to use eight connectors SATA, six Molex and one Floppy. Here, too, found a significant difference – in a 550-watt power supply connector is smaller (six SATA, three Molex, one Floppy). Cord Length – 850 mm (SATA), 700 and 850 mm (Molex and Molex + Floppy).

Well, 550- and 650-watt units of this series have been very similar in appearance. Coincide and some design features: standard package size, partly modular design, 120 mm fan. However, G650M has an extended set of connectors (including four connectors PCI-e) provides a more natural and high power characteristics.

Review of Cooler Master V650 (RS-650-AMAA-G1)

The box that comes this PSU, too, was an inch longer than the 550-watt model line – 275 x 195 x 110 mm. Design and information content differences were found.

Unit packed neatly and securely. To protect the body by tradition Cooler Master uses a soft cardboard insert.

Scope of delivery still includes instructions, power cord and mounting screws.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Design V650 was almost indistinguishable from low-end model of its series. External differences again reduced to numbers on the label.

The device is made on the part of a modular scheme.

Unit Dimensions – 149 x 139 x 86 mm (standard ATX-format), weight – 1670 Again 650-watt model was noticeably heavier than the 550-watt, weight is 1510 V550

Unit is equipped with a seven-bladed fan size 120 x 25 mm.

The current in line 12 may reach 54 A. In a 550-watt models – only 45 A, the value rose to 9, A, or 108 watts. As in the previous case, this resulted in increase in the “ratio of the power line 12 to a common power unit.” In V650 it is 99.7%, from V550 – 98.2%.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

The current in line 25 is limited to 3.3 A, a line 5 – 22 A. In sum, it can be fed on to 120 watts of power. The devices in this series are certified according to the standard 80 Plus Gold.

Unit is equipped with a composite connector ATX Mainboard 20 + 4-pin and the CPU 4 + 4-pin. Cord Length – 550 and 600 mm.

But for the video card power connectors are only two PCI-e 6 + 2-pin. Strange – the same in 550-watt model. When this was pointed out above that the junior line of “bronze” blocks in the transition from 550 W to 650 W the number increased to four connectors.Cord length is 650 mm.

The number of connectors for peripherals has been increased. V650 provides the user with eight connectors SATA, six Molex and one Floppy (for comparison – in six V550 SATA, three and one Molex Floppy). Well – this is a great set with a margin which is enough for most home PCs. Cord length is 850 mm (SATA), 700 and 850 mm (Molex and Molex + Floppy).

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

So, the difference between the 550- and 650-watt models of the same line again reduced to improve power characteristics and increase the number of connectors.

In general, the unit makes a very good impression, some confusion is perhaps that the presence of only two connectors PCI-e.However, the 650-watt units are rarely used in systems with a pair of accelerators (for such PCs are traditionally acquire BP “with a stock” – from 700 W), so that it can not be considered a critical disadvantage.

Review XFX Pro 650W (XPS-650W-3XB)

XFX unit comes in a large (325 x 210 x 140 mm) cardboard box, decorated in the traditional style for the producer.

The entire package is covered with a variety of icons and legends. Live – on a different level, about a block reported everything.

Packed device is extremely reliable. Double box, a layer of soft penopropilena, thick “bubble pack” – PSU protected from any “road adventures.”

Elements supplied and unplug folded into a separate flat box:

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Scope of delivery – the same as in units Cooler Master: manual, power cord, mounting screws.

Some of the previously discussed models XFX differed very original appearance (think, for example, Pro 850W). Here everything is modest, although Pro 650W looks interesting both contenders.

As products Cooler Master, Pro650W made by partially modular scheme. Disables made cords with connectors periphery, as well as additional cables with PCI-e and CPU.

Block dimensions – 159 x 149 x 86 mm. This is the only device on the list, does not fully comply with the standard ATX – length increased by 20 mm. This should be considered when purchasing to avoid compatibility problems (unit can not “make friends” with some bodies, in particular – a pocket).

On the other hand, the increase in size of the shell has allowed designers to use a big XFX 135 mm turntable that can be noted as a plus. Pay attention to the original shape of the impeller devyatilopastnoy.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Grille covering the fan can be easily removed without disassembling the body. It can be great to simplify cleaning of the device from dust.

Power ratings Pro650W took place exactly in the middle between the two Cooler Master. The current in the line 12 can reach 53 A (for comparison, the G650M – 52 A at V650 – 54 A), which corresponds to the power of 636 watts. In relation to the nominal model figure is 97.8% – an excellent figure. In general, all three devices were very similar in this respect.

The strength of the current lines of 3.3 V and 5 V is limited to 25 A maximum total load – 150 watts. Unit is certified according to the standard 80 Plus Bronze.

Consider a set of connectors. Nondisconnectable left main cables with connectors ATX Mainboard 20 + 4-pin (cord length – 550 W), CPU 4 + 4-pin (cord length – 600 mm) and PCI-e 6 + 2-pin (two connectors, cord length – 650 mm).

With the help of plug cords can deduce two connectors PCI-e 6 + 2-pin (cord length – 650 mm). In this regard, the unit equivalent to or exceeds the G650M V650. Also “inherited” from older blocks line Pro 650W got a second power connector CPU (the length of the cord plug – 600 mm). However, the practical value of this solution is questionable – 650-watt power supply is unlikely to be used in conjunction with “extreme” motherboard for overclocking nitrogen or in a dual-processor system.

On a set of connectors for peripheral unit approximately equivalent to their rivals. The difference comes down to a lack of a single connector Molex, everything else was the same, the user is offered eight SATA, five and one Molex Floppy (displayed using an adapter). Cord length – 420, 650 and 750 mm.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W

Power supply XFX Pro 650W impresses solid product with a rich set of connectors, modular design and very good power characteristics. The main external difference from the opponents – Increasing the size of the body and a large 135 mm turntable.

The rest must show tests – it’s time to move on to the practical part of the material.

Conclusion

We begin, as usual, by listing the pros and cons of the blocks.

Cooler Master G650M

Pros:

  • High power characteristics (maximum load when tested our technique – not less than 600 W);
  • Low noise in all modes;
  • High rate of efficiency (for this category of devices) – 84-88%;
  • Good quality stabilization;
  • All necessary connectors for productive system with two graphics cards;
  • Modular design.

Cons:

  • Significant disadvantages were observed.

Cooler Master V650

Pros:

  • High power characteristics (maximum load when tested our technique – not less than 600 W);
  • Excellent noise characteristics (unit difficult to hear at all levels of activity);
  • Very high rate of efficiency – 87-92%;
  • Good quality stabilization;
  • All necessary connectors on system performance of a single GPU;
  • Modular design.

Cons:

  • The presence of only two slots PCI-e (minus conditional on the background of other participants).

XFX Pro 650W

Pros:

  • High power characteristics (maximum load when tested our technique – not less than 500 W);
  • High rate of efficiency (for this category of devices) – 84-88%;
  • Good quality stabilization;
  • All necessary connectors for productive system with two graphics cards;
  • Modular design.

Cons:

  • High noise level under load more than 250-300 W;
  • Non-standard housing dimensions (length increased by 20 mm).

So, XFX Pro 650W successfully compete with the “bronze” Cooler Master model for quality stabilization and efficiency indicator, but essentially conceded on noise characteristics. The noise is noticeable even at the minimum load at the maximum the same Pro 650W naturally be heard from the next room. It is time once again to ask the question – why? Large 135 mm fan is great “blows” the body is already at 1000 rev / min. Obviously, the designers have once again decided to play it safe.

Cooler Master G650M is the new leader in the category of 650-watt unit with a certificate 80 Plus Bronze. Previous champion in this group – XFX XPS-650W-SEW – slightly exceeds G650M only on the quality of stabilization, but inferior in terms of efficiency and noise characteristics. Among the advantages of Cooler Master G650M can note a modular design and standard dimensions of the body.

The same dignity and have the older model Cooler Master V650. This unit has converged in a dense combat Corsair CS650M (and this is a formidable opponent – one of the leaders of our composite rating of 600-watt and 650-watt models) and did not yield. It demonstrates the very high efficiency, good quality and excellent stabilization power characteristics. Such a device can be recommended for purchase for use in power-hungry systems with a single video card.

Testing three power supply capacity of 650 watts: Cooler Master G650M, Cooler Master V650 and XFX Pro 650W updated: April 8, 2015 author: John Malkovich