Coolmax CUG-950B 950W Power Supply

Closer Look and Testing

Coolmax CUG-950B 950W Power Supply Review Coolmax CUG-950B 950W Power Supply Review

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Another great feature of this PSU is that comes with a bunch of cables, more than you probably will need, and each with slightly different combinations of connectors, which adds to the versatility. . Of note are two 6-pin PCI-Express cables and two 8-pin PCI-Express cables, which are really good for multiple graphics cards. However, the supply didn’t have a few connectors that I like to see, such as a 3-pin fan connector that allows you to plug in up to three 3-pin CPU or case fans using a single cable. Also, the P4 connector (the 4-pin connector used to power the motherboard) is on the same cable as the PCIe connector; I like to have that one on a separate cable in case you don’t need the PCIe connectors.
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Taking a closer look at the PSU, the exterior of the power supply has a sleek-looking, all-black matte finish. I like the matte finish, as doesn’t show too many fingerprints as some other finishes. There is a large 140mm cooling fan on this power supply, which likely aids in keeping it quiet but hopefully doesn’t result in higher operating temperatures and less efficiency. The rear of the power supply has a simple on/off switch. The side panel lists the various rail outputs, with the 3.3V rail rated at 30A, the 5V rated at 30A, and quad 12V rails at 20A, 20A, 25A, and 25A respectively. Obviously, quad rails are nice, as they provide more stable power than dual or single rails.
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Installation of the PSU was fairly straightforward. To install the PSU, simply place the unit into the case and attach it using the standard four screws that are included. Finally, plug in all the components and you’re ready to go. I did find the cables a little stiff, compared to other flat-flex cables such as the ones from Ultra. After turning on the computer, I was pleasantly surprised to find that the power supply was indeed quiet compared to other power supplies. The PSU fan does not have any LEDs to add extra style to the build. Airflow through the power supply seemed adequate, thanks to the large 140mm fan.
Testing was done by measuring the voltages at the connectors with a multimeter. Idle voltages were taken running Windows and full loads were taken while running SiSandra Pro. Results of similar tests on a previously reviewed GlacialPower 550W PSU and the aforementioned Ultra X3 600W PSU are included for comparison.
AMD 64+ AM2 5500+
ECS GeForce 6100SM Motherboard
2 GB SuperTalent DDR2 RAM
GeForce 9800GT video card
Western Digital 250 GB 7200 rpm harddrive
Maxtor 200GB rpm hard drive
Hitachi 80GB SATA harddrive
LG DVD burner
3.3V testing:
Coolmax CUG-950B 950W Power Supply Review
The 3.3v rail performance was very stable, as with most PSUs on the market.

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