Efficiency, Differential Temperature and Noise
Efficiency is defined by the power output divided by the power input and is usually expressed as a percentage. If a PSU were a 100% efficient (which none are) 750 watts of AC power going in would result in 750 watts of DC power coming out (with no waste heat to dissipate). In the real world there are always inefficiencies and power is lost in the form of heat during the conversion process. Newer revisions to the ATX12V Power Supply Design Guide V 2.2 have continued to increase the efficiency recommendations for PC switching mode power supplies and now lists both required and recommended minimum efficiencies.
We measured the AC power input to the XFX TS750 PSU with an Extech power analyzer while the total DC load was found by adding all the individual +3.3V, +5V, +12V, -12V and +5VSB loads together.
The overall efficiency of the XFX TS750 power supply is also very good and meets the criteria for 80 Plus Gold certification, even while operating on 120 VAC and at elevated temperatures.
80 Plus Program
Note: Tests conducted at room temperature (25°C)
Differential Temperature and Noise Levels
To simulate a demanding environment, some of the warm exhaust air from the PSU under test is recirculated back to the intake through a passive air duct, which allows the PSU air inlet temperature to increase with load, just like it would in a real PC.
The differential temperature across the power supply was calculated by subtracting the internal case air temperature (T in) from the temperature of the warm exhaust air flowing out the back of the power supply (T out).
Thermocouples were placed at the air inlet and exhaust outlet. The ambient room air temperature was 23ºC (74ºF) +/- 0.5ºC during testing.
T out = temperature of air exhausting from power supply
T in = temperature of air entering power supply
Delta T = T out – T in
Sound pressure level readings were taken 3’ away from the rear of the case in an otherwise quiet room. The ambient noise level was ~27 dBA.
The XFX TS750 PSU cooling fan started out slow and very quiet and stayed that way until we were well into the 50% load test. At the 75% load mark the fan noise was still relatively quiet but at the 100% load mark the fan noise became very noticeable.
I’d hope so.
I’d hope so.
It is “Haswell Ready”
It is “Haswell Ready” according to the XFX website.
…it was a joke. Sorry, I
…it was a joke. Sorry, I just think it’s a funny thing to advertise in late 2016.
you are also right
you are also right
I would have thought the lack
I would have thought the lack of a grommet or similar “protection” on the wiring exit hole from the PSU case would have been marked down as a “weakness” in the Conclusions. An item like that prevents wire chafing against the PSU case and eventual short circuit or even fire.
Given the lack of proper wire protection at the exit hole I would have downgraded this product much further than “Gold Award”. Seriously… think of the customer’s safety.
Your concern is valid but
Your concern is valid but consider this – the exit hole has rounded edges as mentioned in the article. Zoom in on the picture and you can see it.
It’s not the same level of hazard as a punch out hole on a electrical connector box. Extremely sharp edges that require a grommet. Chafing is not the problem, sharp edges cutting the wire insulation is.
Hi, is this (the version
Hi, is this (the version 650W) one better then a EVGA GQ 650? I need it for Ryzen and a 250 euro video card, to update then to vega nothing more than that.