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The OCZ ZT series boasts a number of features, such as a fully modular cable management system, ball-bearing 14cm fan, 105° rated capacitor, over voltage, over current, over power, short-circuit protection and of course the 80-Plus Bronze Certification.
The OCZ ZT series utilizes a single +12VDC rail which we much prefer to power supplies that use quad rail designs for example. The 650w model for example has a 62A 12v rail but if it featured a quad design that would mean four 15.5A rails. This becomes a problem when you have a graphics card that is capable of sucking down more than 15.5A as it will cause the system to crash (BSOD) or something to that effect.
The 45A (550w), 54A (650w) and 62A (750w) single rail designs of the OCZ ZT series makes them much harder for SLI/Crossfire graphics cards to max out, and with this arrangement it cannot be done without significantly more hardware added to the system. This kind of arrangement could also produce more stable and better overclocking results. The OCZ ZT power supplies all utilize a 14cm dual-ball bearing fan made by Yate Loon. The seven blade fan operates at 2800 RPM and is said to move 140 CFM of air while making 48.5dBA of noise. This is a DC fan with a 12v/0.70A rating with the model name D14BH-12.
Finally, the last key feature is the 80-Plus Bronze certification, which means under 20% load the power supply will have an efficiency level of 82%, while this will increase to 85% under 50% load, and finally 82% at 100% load. This means that the ZT power supplies waste 18% or less electricity due to heat when operating at room temperature. However OCZ also claims that the ZT series will deliver full power continuously 24 hours a day, 7 days a week when operating at temperatures as high as 45 degrees Celsius. Of course we are not sure what this temperature, which is just over two times greater than room temperature, does to the unit’s operating efficiency. The efficiency of a computer power supply is the amount of energy it supplies, divided by how much energy is input. The remaining energy is converted into heat. For example if a 750w power supply only had an efficiency rating of 60% under full load, it would draw 1250w from the wall, 500w of which would be lost as heat. However, if we had a 750w unit with an 80% rating, 930w would be drawn from the wall and just 180w would be lost as heat. Finally, the 80-Plus Bronze certification, which calls for a maximum load efficiency of 85%, means that a 750w unit will draw roughly 860w from the wall, which means it will lose just 110w as heat. So the greater the efficiency the more you save on your power bill and the “greener” you will become. |
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trendy |
Posted on: 01/30/2012 08:58 AM
good looking psu's for the money, might have to go for the 750w version in my next build. |
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Sly |
Posted on: 04/10/2012 07:38 PM
Real good review ,just bought OCZ ZT 750 can t wait to install . Hope it last long .Actually i have Thermaltake 430 and it run very good so ocz 750 should be really good for Crossfire HD7770. Asrock 990fx extreme 3,FX6100 ,HyperX DDR3 1600 8gig ,SSD , HDD and dvd .Not high end setup but i have 2 side by side enough to play  Thx again, Great review it make us easy to choose what we need . |