Gigabyte is one of the largest manufacturers of computer components with the widest range of production. Not surprisingly, the power supplies, the company offers a lot – the number of models is difficult to count, suffice it to say that only one power supply lines in the Gigabyte directory of more than a dozen!
More recently, we have considered the flagship 1200-watt model, and now turn to the subject of the less powerful, but no less interesting devices. Gigabyte B700H and Gigabyte G750H were presented recently. Similar appearance and names nearly identical packaging – all indicate that the devices belong to the same line.
And it is quite unusual that we are accustomed to the fact that the BP family includes similar models of different capacity, focused on one segment of the market. Here it’s different. Gigabyte B700H certified under the standard 80 Plus Bronze and belongs to the middle class, and Gigabyte G750H – «almost flagship”, which aims to compete with the more expensive “gold” model.
Both units offer a single line 12, is officially supported configurations with multiple graphics cards ( «SLI / CrossFire Ready»), in addition, the design uses a reliable fans and quality Japanese solid capacitors. Are all the differences between the two parties are reduced to 50-watt difference in power? Let’s check, and at the same time and compare Gigabyte B700H and Gigabyte G750H with several popular “classmates”.
Packed and equipped with these devices are almost identical. So I propose to consider boxes (and their contents) in parallel, so as not to bore readers with endless repetitions.
Package dimensions – 275 x 195 x 115 mm. Unfortunately, the handle is not provided, so before you buy is better to prepare a convenient carrying bag unit.
Boxes of “gold” and “bronze” models look almost the same: differences in shades and figures. Informative in both cases – to the excellent level.
Manufacturer provides a brief description of the model with the release of the key points, a detailed table of specifications and a list of connectors with an indication of the length of the cord.
Both devices are packaged very securely – body “rolled up” into the soft penopropilena, strings are placed in a special compartment of the box. It looks such packaging very carefully and is able to protect the unit from strong shocks and falls from a considerable height.
These PD can safely be ordered from online stores – even the most careless postman will have to try to damage the product Gigabyte.
Set in Gigabyte B700H and Gigabyte G750H was also exactly the same. Instructions, mounting screws, power cord – all mandatory equipment for any “box” model.
However, Gigabyte experts have not stinted and accessories: cloth bag, which is useful for storing the “extra” cords after system assembly, and reusable cloth tie with Velcro.
Well, the two units have been very reliable, and packed “with interest” are equipped with everything necessary. Let us now consider the devices themselves.
Junior PSU looks simple, but solid: there is no deliberate “ornaments” (except that the labels, but they look quite appropriate). Accurate painting, removable fan guard and modular design immediately suggests that this is a high-end device is enough.
PSU Dimensions – 139 x 149 x 86 mm, which corresponds exactly to the ATX form factor specifications. Therefore, the device is guaranteed compatible with all standard housings.
The unit is made on a modular scheme. To be precise – for the partially-modular: Disables made only power cables for video cards (PCI-e) and peripheral (Molex, SATA). The main cables with connectors Mainboard and CPU are secured tightly. Designers sensibly decided that they will be used in most systems.
All connectors are signed, so connectivity is not even the most experienced user can easily cope.
The rear panel has the power button is off.
Gigabyte B700H semilopastnym equipped with a fan size 120 x 25 mm. As has been repeatedly mentioned in our reviews, it is “very typical” (in size, shape and number of the impeller blades) turntable for all PSU with standard dimensions of the enclosure.
Such fans are used a variety of manufacturers, differ only in the type of bearing. Gigabyte experts have selected double-row ball bearings with a very long service life: 50 000 hours.
Now look at the table of characteristics. As befits a high-quality high-power PSU, Gigabyte B700H offers a single line 12 (note this is a positive thing). Maximum current on the channel can be up to 54 A, which corresponds to the power of 648 watts. This is 92.6% of the declared nominal power supply – an excellent result for the model of the middle class!
Along the lines of 5 V and 3.3 V in the amount you can apply up to 130 watts of power. The current in these channels is limited to 18 and 22 A. Gigabyte B700H certified according to the standard efficiency 80 Plus Bronze.
PSU is equipped with composite connectors Mainboard (20 + 4 pin) and CPU (4 + 4 pin), to ensure maximum compatibility with various motherboards. The length of the cords that host connectors, 500 and 600 mm.
For power graphics cards are encouraged to use the four connectors PCI-e 6 + 2 pin, fixed in pairs on the two cords of 650 mm in length. This is a great set for any “semisotki» – Gigabyte B700H can be used with a pair of powerful graphics cards systems.
The manufacturer has not stinted on the connectors for the periphery, seven SATA, Molex three and one Floppy. This is with a margin enough for almost any home PC.
Cord length is 650 mm, 800 mm and 950 mm.
According to the results we can conclude an external examination that before us a solid model of its cardinality category. The unit offers a wide range of connectors, including four connectors PCI-e, which is the first sign of quality “semisotki”, capable of operating in the productive system. As additional advantages, I note a modular design and a single line of 12 high-impact projects.
The older model looks like an enlarged copy of the youngest. The body is also painted black, appearance successfully supplement colored stickers.
The dimension of the body in this case is 149 x 159 x 86 mm. The length is increased by 20 mm (compared to devices that exactly match the ATX specification, for example – Gigabyte B700H).
If pozanudstvovat, it should be noted that this somewhat limits the unit will work with a variety of buildings (in particular – the compact case with limited interior space). But in fact, 20 mm – it is quite a bit, many “classmates» Gigabyte G750H much larger. In addition, the increase in size has allowed designers Gigabyte use a larger fan, so this approach has its advantages.
This power unit as Gigabyte B700H, made by partially-modular scheme. Cords with main connectors that are used in most systems, are left can not be disabled.
The rear panel has the power button is off.
In contrast to the entry-level, 750-watt unit is equipped with a fan size 140 x 25 mm.
However, the shape of the impeller blades and the number he was very similar to the standard “stodvadtsatkoy”. Additional similarities – in this case used as a double-row ball bearings with a stated resource of 50,000 hours. Separately, I note that the grating covering the fan, both models Gigabyte mounted outside. They are easy to remove, which is much easier to clean from dust devices.
As for the power characteristics, high-class 750-watt model is clearly superior to a more modest 700-watt unit. Claimed power devices differs on 50W, but the load capacity of the line 12 – almost 100 watts. 744 W – is 99.2% of the nominal Gigabyte G750H. The indicator is close to ideal.
Current lines at 3.3 V and 5 V can be up to 22 A. The maximum total load – 120 watts. Gigabyte G750H is certified according to the standard efficiency 80 Plus Gold.
On a set of connectors 750-block cotton appeared identical to the 700-watt. It features a length some cords.
For CPU and motherboard connectors used components Mainboard 20 + 4-pin and the CPU 4 + 4 pin. Cord Length – 600 and 650 mm.
To power the video card is proposed to use four slots PCI-e 6 + 2-pin. The length of the cords that host these connectors is 650 mm. It is true all the things concerning Gigabyte B700H – it is appropriate to set this unit cardinality category. The device can be used with a pair of flagship graphics card systems.
But the number of connectors for peripherals and can be increased. The SATA seven, three and one Molex Floppy – this is enough for most systems, but some competitors Gigabyte G750H offer much more.
Cord Length – is the same as the younger models: 650, 800 and 950 mm.
So, for the “golden” PSU manufacturer claims very high power characteristics. Key external differences from the younger model – increased fan diameter and length of the hull. But on a set of identical connectors Gigabyte G750H and B700H. We proceed to the Test section and see how the power supplies shown in practice.
Let’s start with the youngest – 700 watt – model. Let me remind you that the requirements of our method, all devices cardinality of this category must ensure the normal operation of the system under real load of not less than 600 watts (100 watts less than the stated par value).
Due to the high load capacity of the line 12 Gigabyte product easily coped with this task. Next Mode (650 W) was also on the shoulder this unit. For the model of the middle class – a very good result.
For the unit certified under the standard 80 Plus Bronze, this model shows a very high efficiency. In the most “convenient” mode with an average load figure reaches 88%.
But the quality of stabilization can be considered at most satisfactory. The voltage on line 12 under load is markedly reduced, but still corresponding block ATX standard.
At minimum load turntable rotates at a speed of about 980-990 revolutions / min. Index almost unchanged until the load of about 500 watts. Further rapid growth begins.
The rotational speed of the impeller directly affects the noise level. Up to 500W PSU is very quiet, at 500-550 watts – just quiet. Next there is a distinct ‘hum’ fan, but a truly “hands-free”, this model does not become even at maximum load.
At the 750-watt model Gigabyte carrying capacity line 12 is almost exactly match the declared nominal unit. Not surprisingly, this device easily surpassed the mandatory requirements of our techniques, to cope with the load of 700 watts.
In terms of the efficiency of the “gold” unit significantly exceeds the “bronze” model. Range – 88 to 92%.
At the Gigabyte G750H with the quality of stabilization in order. The voltage on the line 12 hardly decreases with increasing load.
The standard rotation speed turntable is 800 rev / min. To achieve increase speed we managed only in the course of a long test at maximum load.
The device is very quiet at any level of consumption.
Group 700-watt units
700-watt model Gigabyte belongs to the middle class. Confront her in this test will be two similar devices cost: Aerocool VP-Pro 700W and Cougar PowerX 700W (CGR B4-700).
Both units, as well as our subject, are certified according to the standard 80 Plus Bronze. Separately, I note that the Cougar PowerX at one time made a very good impression, it is quiet and quality power – a dangerous opponent for any model of its price range. Aerocool VP-Pro is not as menacing, but is able to give an idea about the possibilities of a “typical” middle-class devices.
Minimum load – 150 watts.
Thanks to a more modern platform Gigabyte B700H shows high efficiency even at minimum load. See how noticeable gap between the two rivals. The quality of stabilization and noise, all three devices were approximately equal. Increase consumption.
The average load – 350 watts.
With an average consumption level on the charts there is a rare “unanimous”. Three blocks are very close in quality stabilization, noise performance and efficiency.
High capacity – 600 watts.
At high load Gigabyte B700H manage to show excellent efficiency. The quality of stabilization of this unit on par with Aerocool VP-Pro 700W, and on the noise characteristics is located just in the middle between the two rivals.
Group 750-watt units
Confront Gigabyte G750H also designed two models of a similar class – is well known to the majority of overclockers and is widely represented in the Russian retail Deepcool DQ750 and Chieftec GDP-750C. Both units are certified according to the standard 80 Plus Gold and different body dimension increased (in both cases, a large 140 mm fan) – very suitable rivals for Gigabyte product.
It is particularly interesting that DeepCool, and slightly more expensive Chieftec Gigabyte G750H (about 15-20 US dollars or 1000-1300 rubles at current exchange rate).
Minimum load – 150 watts.
Gigabyte G750H leader in all disciplines of our test. Once again, I note that the more modern “stuffing” PSU Gigabyte achieves high efficiency even at minimum load.
In comparison with the previous regime the situation has hardly changed. For high-quality “gold” PSU 350W – it is not too high load. Gigabyte product again leads the noise characteristics and performance efficiency.
High capacity – 650 watts.
Chieftec GDP-750C manages to impose product Gigabyte fight. But the latter still has the upper hand because of better noise characteristics. Given the already mentioned difference in cost, this win can be considered unconditional.
We proceed to the debriefing. We must start with a brief listing of the pros and cons of the tested devices.
As an added plus, I note the standard size of the body – in this respect Gigabyte B700H favorably with most modular PSU cardinality of its category.
Thus, both the novelties presented by the Gigabyte, was able to show convincing results in the current test.
Junior, 700-watt power – it is a successful model of its category. Of course, with a load close to the maximum, the fan speed increases. But it is characteristic of all “semisotkam” (and more powerful units) middle class.
In a typical system with a pair of graphics cards (the consumption of such assemblies when the game loads usually does not exceed 400-500 W) unit would be almost silent. Other characteristics also at: efficiency in the “friendly” regimes significantly exceeds 85%, the stabilization system staunchly opposed undervoltage with an average load. As a result, Gigabyte B700H model is best suited to work with some “reserve” power.
Gigabyte G750H showed himself quality modern high-end PSU. Quiet operation, very high efficiency, excellent quality of stabilization – and all this at a very reasonable cost. Seek out flaws in this model is necessary “under the microscope”. Perhaps the manufacturer should just increase the number of connectors for peripherals. The rest – no complaints.