The TX550M delivers close to 46A on the +12V rail which is adequate for a graphics card that would be installed in a system adopting a power supply of this capacity. Correctly testing power supplies is a complex procedure and KitGuru have configured a test bench which can deliver up to a 2,000 watt DC load. Due to public requests we changed our temperature settings increasing ambient temperatures by 10c (to 35c) in our environment to greater reflect warmer internal chassis conditions. Load regulation is good across the output range. The power supply delivered 642 watts of power before it would shut down, safely. Today to test the Power Supply we have taken it into our acoustics room environment and have set our SkyTronic DSL 2 Digital Sound Level Meter (6-130dBa) one meter away from the unit. We have no other fans running so we can effectively measure just the noise from the unit itself. That said, measuring lower than 28dBa proves very difficult, unless in strict laboratory conditions. It is OK for some, but it has caused a burn out for me in the past. Twice in fact. I run separate cables, always.

Semi-Modular: Allows user to only use the cables they need for a cleaner looking build with better airflow Efficiency is excellent, peaking at around 92% at around 50% load. At full load, this drops to around 89.35%. Solid results. This is one of the quieter power supplies we have tested this year, and even at a constant 450 watts of power delivery when gaming, the fan did not make itself heard over a few system fans. If you need a constant 500 watt+ power delivery you really should be looking at a higher capacity power supply anyway. Its very rare but not unheard of for PSU cables to melt when using only a single cable on extremely high powered cards have seen it happen with Seasonic PSU´s before but as i said its very rare

I Swapped the CEO's Assistant For a Day!

One side of the power supply is home to the modular connectors across two small rows at the rear. The other side of the unit is home to the power connector, power switch and vented honeycomb panel. It truly should be one cable per 8 pin connection. If you look into the specs and details daisy chain cables are garbage and should not even exist. Obviously when measuring AC noise and ripple on the DC outputs the cleaner (less recorded) means we have a better end result. We measured this AC signal amplitude to see how closely the unit complied with the ATX standard. AC Ripple (mV p-p) Corsair recently launched a new range of semi modular Gold rated power supplies in 550W, 650W and 750W capacities. These competitively priced units incorporate high grade Japanese capacitors and a compact size of 140mm to fit into a variety of chassis on the market. Corsair are offering a full 7 year warranty. Just as the TX750M did, the Corsair TX550M fills our chart for features. This is a great list of features to find in such a low wattage power supply and we will find a few things that you wouldn't expect. Most notable are the 50C power rating and over temperature protection. These features are typically reserved for units of higher output and usually incur a little bit more of an impact on the wallet too.

i7 8086K, AORUS Z370 Gaming 5, 16GB GSKILL RJV DDR4 3200, EVGA 2080TI FTW3 Ultra, Samsung 970 EVO 250GB, (2)SAMSUNG 860 EVO 500 GB, Acer Predator XB1 XB271HU, Corsair HXI 850W.

Typical Apple Innovation…

i9 9900K @ 5.0 GHz, NH D15, 32 GB DDR4 3200 GSKILL Trident Z RGB, AORUS Z390 MASTER, EVGA RTX 3080 FTW3 Ultra, Samsung 970 EVO Plus 500GB, Samsung 860 EVO 1TB, Samsung 860 EVO 500GB, ASUS ROG Swift PG279Q 27", Steel Series APEX PRO, Logitech Gaming Pro Mouse, CM Master Case 5, Corsair AXI 1600W Titanium. Our load tests utilize a couple of FAST ATE active load testers and a variety of other equipment such as an oscilloscope, power conditioner, temperature probe and a power consumption meter. You can read more about our standard testing approach here.

Thank you all for the input. Sounds like it's probably advisable to add the second cable and sacrifice some cable management cleanliness. Its probably fine to use a single cable but if you have two cables in the box and have room in the case for both cables i would both just in case The rear of the box showcases some of the main selling points, if you were browsing in a retail store. Does anyone still walk into a retail store to buy components? let us know in the comments below…

The TX550M passed our demanding cross load test, and ripple suppression is also well within safety parameters with +3.3V and +5V peaking at 15mV. The +12V rail peaked at 25mV when under full load. The units Load regulation proved solid as well throughout all our tests. Technically, this unit is a no frills semi modular design which dealt with our suite of tests without any failures. It did not exhibit any concerning weakness under real world usage situations either, it was able to deliver over 600 watts of power before safety measures stepped in for a safe shutdown.