Corsair ax 750 or seasonic x-750?

Jaws · Post by **Jaws** » Sat Aug 14, 2010 9:58 am

What Ive heard that they are the same model but re branded into corsair/seasonic.
Is their any reason to go for the more expensier seasonic(it is here) ??

lodestar · Post by **lodestar** » Sat Aug 14, 2010 10:33 am

The Corsair ax750 is indeed the Seasonic X-750 under another name, and somewhat cheaper into the bargain. If you're wondering why Seasonic would do that, the answer is that the Seasonic X-650/X-750 are shortly (September?) to be replaced by the X-660 and X-760 models "....with improved performance and reliability...". So the price of the Corsair reflects that it is an (about to be) old model Seasonic.

Edit: The X-660 and X-760 will be joined by a new X-560 model. The datasheet for the X-560 is already on the Seasonic web site, as a 500Kb PDF at http://www.seasonic.com/pdf/datasheet/N ... /X-560.pdf. Apart from the capacity related items, the only obvious difference I can find between the X-560 and the current X models is that the 560 has ".... High Current Gold Plated Terminals....". These terminals are on the the ends of the leads that plug into the PSU.

Joe Public · Post by **Joe Public** » Tue Aug 17, 2010 11:53 pm

Actually, the new Corsair AX750 and 850 are based on the X-760 and 860, not the old models. At least that was hinted from Corsair themselves. Also, a Greek site cracked an AX850 open and found that it was the more recent X-860 platform. Link, thread @ Jonnyguru.

sub · Post by **sub** » Wed Aug 18, 2010 2:17 am

And the warranty on the corsair is 7years / 5 for the seasonic.

lodestar · Post by **lodestar** » Wed Aug 18, 2010 2:42 am

Joe Public wrote:At least that was hinted from Corsair themselves. Also, a Greek site cracked an AX850 open and found that it was the more recent X-860 platform.

There is no X-860. The X-850 is the new model from Seasonic, see http://www.seasonic.com/new/twevent20100525.htm. It uses the revised X-series features as you would expect it to. So AX850 and X-850 are the same.

The complaint (particularly from people who recently bought the X-750) is that their PSU has been obsoleted relatively quickly by "the same model" under a slightly different name. For example, the capacity figures for the X-750 and X-760 are indeed exactly the same. There are changes to the fan grill and some other minor casing differences in the new X series. In addition output connectors are now gold plated.

There seem to be two major internal changes. One is that X-400 style larger heatsinks are being used on other models for example the X-850. The other is that the separate DC-DC convertor board has been revised. The components on the board look the same, but the layout is different and the board is visibly smaller. Seasonic are reported to be claiming reliability and performance improvements for the new X series so there may be more to it than that.

Personally I wouldn't be too much bothered at getting either the old X-750 or new X-760 under some other brand name, since either would be an excellent PSU. Provided that is that the price is reasonable.

Edit: My local hardware dealer has the Corsair AX750 in stock for about 2% less than the Seasonic X-750 - so that would be an easy choice. They also have the AX850 which is about 20% more than the AX750.

Compddd · Post by **Compddd** » Thu Aug 19, 2010 2:12 pm

I just ordered a Seasonic X-750, got it for $139.99. Should I return it and wait for the X-760 instead since it has the improved insides of the X-400 fanless series?

faugusztin · Post by **faugusztin** » Thu Aug 19, 2010 2:20 pm

Don't do it, it's pointless. Do you care if your fan turns on each 10 minutes or each 10 minutes 30 seconds ?

ilovejedd · Post by **ilovejedd** » Thu Aug 19, 2010 2:49 pm

lodestar wrote:The complaint (particularly from people who recently bought the X-750) is that their PSU has been obsoleted relatively quickly by "the same model" under a slightly different name.

Can a PSU even be obsolete? As long as it works and delivers good, clean power at fairly high efficiency, what's the big deal?

m0002a · Post by **m0002a** » Mon Aug 30, 2010 12:54 pm

I noticed that there is now a Seasonic SS-560KM 80-Plus Gold on NewEgg. It is also known as the X-560 per Seasonic website. It has the Seasonic Hybrid Silent Fan Control like the X-650 but is likely to be more efficient for most users than the X-650.

lodestar · Post by **lodestar** » Tue Aug 31, 2010 12:01 am

The potential problem with the X-560 is going to be the premium price, $130 on NewEgg. From the same vendor the X-400 is $140, as also is the X-650 reflecting its about to be old model status. The X-750 is $180. The Corsair AX750 is $170.

So if you want a 750 the Corsair is the best buy. On the other hand if you're considering an X-560 which would you choose for another $10 more - the X-650 or the X-400?

bsoft · Post by **bsoft** » Sat Sep 11, 2010 1:40 pm

lodestar wrote:The potential problem with the X-560 is going to be the premium price, $130 on NewEgg. From the same vendor the X-400 is $140, as also is the X-650 reflecting its about to be old model status. The X-750 is $180. The Corsair AX750 is $170.

So if you want a 750 the Corsair is the best buy. On the other hand if you're considering an X-560 which would you choose for another $10 more - the X-650 or the X-400?

For me the 560 would make the most sense because I'm looking at an i3 / Radeon 5770 system. For that even the 560 is way overkill, but I like the other features of the X series (noise, efficiency).

I'm honestly not a fan of the X-400 because it doesn't have a fan. Yes, it's stable even in harsh environments. But the fact that you need to mount it the correct way means that case selection is more limited (especially in micro ATX), the X-series fan is basically off or very quiet at the power levels I care about (under 200W), and I generally just don't want to worry about whether my PSU is getting too hot - with the X-560 I know because I can hear the noise.

zerodB · Post by **zerodB** » Mon Sep 20, 2010 5:18 pm

Where do you find these X-*60 series PSUs? Newegg only has the x-460. How much power can the X-460 handle, and how many case fans would be required? Are the X-*60 series quieter than the X-*50 series? Where can I find the X-660? It isn't really clear what is new...

Thanks!

lodestar · Post by **lodestar** » Mon Sep 20, 2010 8:17 pm

Newegg has the Seasonic X-560, they list it as the Seasonic SS-560KM. The new Seasonic X-series on the market so far are the fanless X-400 and X-460, and the X-560. Seasonic announced that there would be an X-660 and X-760 earlier in the year, but they are not available yet.

My local hardware dealer here in the UK is listing the X-400, X-560 and the "old model" X-650 at virtually the same price. They have the X-460 too, but it is priced at about 25% more than the X-400. From the same retailer the Corsair AX750 is a touch cheaper than the X-460.

Both the X-400 and X-460 will I suspect require cases with a reasonable air flow. How much airflow they need will probably emerge as the user base grows. On the face of it they might be better deployed in a top mounted position, with the exhaust fan arranged to blow inwards.

m0002a · Post by **m0002a** » Mon Sep 20, 2010 9:50 pm

lodestar wrote:Newegg has the Seasonic X-560, they list it as the Seasonic SS-560KM.

That seems correct since the Seasonic website lists it as the "Model: X-560 (SS-560KM Active PFC F3)."