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Seasonic Platinum Series 1200 W

crmaris

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Seasonic recently added a new high-end model to their arsenal, a 1200 W unit with Platinum efficiency, extraordinary performance, semi-passive operation, and a fully modular cabling design. This PSU is one of the best we ever tested and teaches manufacturers a lesson in how to push analog circuits to their limits.

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Far away from Super Flower, Flextronics and Delta PSUs :/
 
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Is this psu not the creme de la creme ?
 
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Far away from Super Flower, Flextronics and Delta PSUs :/
Doesn't Delta usually use multiple small 12v rails? I am not sure, but if it does, then flextronics, superflower and seasonic have better designs IMO, which are preferable to me inspite of Delta's legendary build quality.
 
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I didn't even need to read this review to know it would get a great score. (No worries, crmaris. I read it anyway! Great as usual ;) )

The 1000W was amazing. Went to the worst places looking for that one and couldn't find here in Brazil. My 290s don't require 1200W, but damn, i want this PSU badly.
 

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Cant wait till the 1050,1250 are reviewed. Also cant wait till they launch a 1600 watt unit
 

crmaris

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X-1250 is next on my list..
 
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Doesn't Delta usually use multiple small 12v rails? I am not sure, but if it does, then flextronics, superflower and seasonic have better designs IMO, which are preferable to me inspite of Delta's legendary build quality.
They adapt the rail setup to the customer's requests. They can use split rail or single rail at their discretion. And sometimes the OCP trip point of rails are actually set higher than the label indicates. Multiple rail is not a drawback when it's done right.
 

crmaris

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thing is that it can cause problems if it isn't implemented right and especially with some umber high-end VGAs that draw lots of Amps from the PSU. All this time I test PSUs I never encountered a single problem with a single rail unit (I mean melted wires etc.) on the contrary I fell into trouble (shut downs) quite many times with multi rail ones, at very high loads though.
 
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thing is that it can cause problems if it isn't implemented right and especially with some umber high-end VGAs that draw lots of Amps from the PSU. All this time I test PSUs I never encountered a single problem with a single rail unit (I mean melted wires etc.) on the contrary I fell into trouble (shut downs) quite many times with multi rail ones, at very high loads though.
My point exactly. Besides one must know exactly which cable comes from which rail to distribute the load as evenly as possible. This is especially important in high end sli/cf configurations. Single rail PSUs, on the other hand, are simpler to setup.
 

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Yet gotta be careful with arching in eveng of catastrophy. I mean .5 amps can be fatal...
 

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Regardless this is a fantastic PSU and a terrific review. Thanks for all the work!!
 
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great review indeed, it was very instructive to read.
 

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Nice review.

They adapt the rail setup to the customer's requests. They can use split rail or single rail at their discretion. And sometimes the OCP trip point of rails are actually set higher than the label indicates. Multiple rail is not a drawback when it's done right.
When it's done right, how ever just get a single rail and never have to think it could be a issue.
 
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Well, personally I will be far more interested in 400-600W platinums than some overkill 1200W priced to the moon.
 

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Well, personally I will be far more interested in 400-600W platinums than some overkill 1200W priced to the moon.
High price ?, not to sure about that as seen as they gotta handle such power going though them and not fry every thing you own.
 

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Well, personally I will be far more interested in 400-600W platinums than some overkill 1200W priced to the moon.

Try corsair. Easily 300-400 usd.
 

ralle_h

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Hey everyone,

I'm very interested in the PSU mainly cause of the semi-passive mode for idle and light load, but also gonna put it into some heavy gaming load (one GTX 980 for now and maybe soon another 980 to come, combined with a overclocked 4790k with 4,8 GHz) and I'm very interested in some user experience or real world experience regarding the noise of the fan, as I am a bit confused about the noise, which was a negative point in this review.

Other reviews that I checked out recently (that tested the PSU without a hotbox and normal room temperature) reported that the fan was inaudible, even during full load of 1200W.

Can anyone confirm or negate these statements?
 
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Hey eversone,

I'm very interested in the PSU mainly cause of the semi-passive mode for idle and light load, but also gonna put it into some heavy gaming load (one GTX 980 for now and maybe soon another 980 to come, combined with a overclocked 4790k with 4,8 GHz) and I'm very interested in some user experience or real world experience regarding the noise of the fan, as I am a bit confused about the noise, which was a negative point in this review.

Other reviews that I checked out recently (that tested the PSU without a hotbox and normal room temperature) reported that the fan was inaudible, even during full load of 1200W.

Can anyone confirm or negate these statements?
That will not load the PSU that much, so I'm guessing it will be pretty quiet. That CPU and one 980 will max out at below 400W.

Also, it's not everyone that can accurately test noise. Oklahomawolf at jonnyguru.com can't, because load testers are loud things.
 
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