Ultra X-Pro and X-Finity 800Ws (Cont’d)
Quad +12V outputs
Both of the Ultra 800W power supplies have four 12V outputs (+12V1, +12V2, +12V3, and +12V4) each rated for up to 20A. One big difference from most other PC power supplies (that derive all four +12V outputs from a common +12V source and differentiate them with individual current limiting circuits) is that the two Ultra 800W PSUs use two output transformers. These two +12V outputs are then further divided by current limiting circuits. In addition to dividing the load across the two transformers, this configuration isolates the components powered from the separate outputs, which can potentially result in greater system stability. While I was not able to confirm this, I suspect that the +3.3V and two of the +12V outputs come off one transformer (yellow label) and the +5V and the other two +12V outputs come off the other transformer (red label).
One of the key differences between the X-Pro 800W and the X-Finity 800W power supplies is how the four +12V outputs are assigned to the various connectors. The following tables show what connectors are supplied by each output for the two different power supplies.
Another obvious difference between the X-Pro 800W and X-Finity 800W power supplies is the type of cables they come with. Both power supplies have a basic assortment of connectors but while the X-Pro 800W has black, sleeved, round cables the X-Finity comes with Ultra’s FlexForce flat cables.
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- Main power connector (24-pin)
- (2) ATX 12V (4-pin)/ (1) EPS 12V (8-pin)
- (2) PCI Express (6-pin)
- (8) Peripheral Optical/HDD (4-pin)
- (2) Peripheral FDD (4-pin)
- (4) Serial ATA (15-pin)
- (2) AST fan connectors (3-pin)
IMHO, a power supply that is rated for up to 800W output should have a few more cables and connectors than either of the two Ultra 800W models come with. I would like to see at least two more PCI-E cables/connectors and a dedicated 8-pin EPS 12V connector added for greater compatibility and flexibility.
Here are a few pictures showing the layout and components inside the two Ultra 800W power supplies. As you can see in the first photo, the two units appear nearly identical with the covers off.
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Once again, based on the URL code, these power supplies are manufactured by Andyson International Co LTD.
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Here you can see the two main output transformers (yellow and red labels) along with the smaller +5VSB transformer to the right.
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