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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cmdrdredd - Wednesday, April 14, 2010 - link
I use an HX1000 Corsair PSU in my system, I would have bought this unit because it's higher quality but they don't make more than 750watt units in this series. Why not?529th - Thursday, April 15, 2010 - link
The 750 should put most machines today in the most efficient part of the efficiency curve.With the 650 model you hit the highest efficiency of 92.1% between 269-292; and most systems draw around there when gaming. My i7 920 (stock clocks,) 5870 (stock clocks,) 6g 1333 1.6v, was right between there; and I'm glad I chose the 650w model. Even then if you are doing a little overclocking, you stay within the 90 percentile between 134w - 588w which is solid. So given the 750w model you can assume another 100w added to the 588w and you'll still be in the 90 percentile which is darn good!
Of course, not all machines are running stock clocks.
529th - Wednesday, April 14, 2010 - link
JonnyGuru did a great review on the[rul=http://www.jonnyguru.com/modules.php?name=NDReview...]Seasonic X-650[/url]. The ripple suppression on these things are top notch. Check out page 3.Isn't he still a mod here?
MamiyaOtaru - Thursday, April 15, 2010 - link
Got the 750 on ebay for 148 (with shipping) after cashback. Was quite a steal considering the MSRPpower draw at the wall went from 153 to 123 at idle. Quite the change from my old aerocool zeroDBA.
jayce - Thursday, April 15, 2010 - link
Are power supply manufacturer’s going to be moving towards switching topology between lower and higher loads?Given the trend in CPU’s/ GPU’s to use power gating and hard disk controllers spinning down disks when idle, are we going to be seeing power supplies which provide high efficiencies in 50w-150w and 400w+ in the case of a 750w power supply.
Bitgod - Sunday, April 18, 2010 - link
I put together a new system using my old HX620 and I was getting squealing from various components. I decided to take a chance and try a new PSU and I knew I wanted one that was more efficient. I'd seen some of the pics of the inside of the X750 and fell in love with it, it's so clean. So I coughed up the money to get one, and luckily it was worth it because all the squealing noises went away. And it's also drawing less power according to the kill-a-watt tester I plugged it into. So, it's pricey, but if you want a good PSU, this is it.Salsoolo - Thursday, June 3, 2010 - link
thats a fine psu90+ all over over, thats amazing
jed22281 - Tuesday, June 22, 2010 - link
I don't suppose any one could offer some thoughts based on my needs outlined in this thread of mine?http://www.jonnyguru.com/forums/showthread.php?p=6...
Much appreciated if anyone can!