Seasonic X-Series 750W: Potent for the Price
by Martin Kaffei on April 13, 2010 11:13 PM EST- Posted in
- Cases/Cooling/PSUs
- Seasonic
- PSUs
X750 - Voltage Regulation and Quality
Looking at the graphs, the +5V rail could be regulated much better for an expensive power supply. In fact, it drops very close to the tolerance limit at full load. However, ripple is much more important and a 5% deviation is still ok with a high load—something you will never reach with a normal system. All the other voltages perform fine and are within specification. The all-important +12V rail is still right at 12.00V even at 100% load.
When Seasonic switches to the resonant topology on higher loads, ripple and noise get much lower and overall they can keep up with Enermax. +12V shows a maximum 24.4mV ripple and the smaller rails are always below 20mV. Clean voltage helps all PC components last longer, so these results are very impressive.
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vol7ron - Tuesday, April 13, 2010 - link
Nice Martin, I've been looking at upgrading my PSU (550W ultra) and I only like buying the modular connectors. $200 still seems kind of high, but almost in the reasonable range. I'd like it to be $150 :)Another thing I might be shopping around for is a new UPS, have you guys reviewed any of those recently?
HOOfan 1 - Wednesday, April 14, 2010 - link
There is a 650W version. Selling for $160 at newegg nowjeffbui - Wednesday, April 14, 2010 - link
$138 at ewiz/superbiiz for the 650w version. I couldn't be happier with it.vol7ron - Wednesday, April 14, 2010 - link
I like the plan for the future though, especially with power supplies since they last long.My guess was that the next upgrade would be 750W or higher, the real goal was to have an 800W PSU and UPS. My machine probably only currently uses 350W, but I like to have headroom, especially since I keep adding HDs and will probably take advantage of more PCI slots in the future.
Souka - Wednesday, April 14, 2010 - link
HX650 or HX750 (both are modular)HX650 is $120 at NewEgg, I have it... quiet and works well. Reviews show it to be 80+ Silver. but Corsair chose to be Bronze as their own testing (under very hot conditions) didn't qualify for Silver... Kudos to Corsair.
Souka - Wednesday, April 14, 2010 - link
Sorry..my bad. Corsair PSU is Silver...almost Gold.One important thing about the HX650 and HX750 PSU is that they're just shy of 90% effecient at a VERY wide range of loading.
True, the Seasonic unit does do better at PEAK efficiency (if using 220v) by a few %, but if you're actually going to use a 750W PSU at any other load than this, the Corsair will save you $$ upfront and in the long run with lower power bills.
My $.02
HOOfan 1 - Wednesday, April 14, 2010 - link
HX650 is bronze...nothing more than bronzeHX750 is silver and was originally awarded Gold by 80plus.
Franson - Wednesday, April 14, 2010 - link
Are you a bot or something? Take your stupid Corsair fanboyism and shove it....!!Souka - Thursday, April 15, 2010 - link
Wow... nice post...piroroadkill - Thursday, April 15, 2010 - link
The HX650 IS a Seasonic design, and I think, by looking at it, the HX750 is a Channel Well design. Regardless, Seasonic was also the OEM for the HX520 and HX620. Seasonic make damn fine power supplies.