SilverStone SX800-LTI SFX-L Power Supply Review @ [H]

FrgMstr

Just Plain Mean
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SilverStone SX800-LTI SFX-L Power Supply Review - SilverStone continues on its march to absolutely own the small form factor PSU market. This PSU is a huge 800 watts worth of power shoehorned into a SFX-L sized package all while claiming "silent" operation with fanless modes as well. Along with that is a healthy amount of PCIe power plugs and claims of unsurpassed efficiency.
 
On page 3 you have a picture of the top fan. Clearly visible is the transparent plastic shield covering perhaps a third of the fan. This must reduce the cooling significantly. I'm surprised you didn't mention it. Why is it there? What happens if you remove it?
 
On page 3 you have a picture of the top fan. Clearly visible is the transparent plastic shield covering perhaps a third of the fan. This must reduce the cooling significantly. I'm surprised you didn't mention it. Why is it there? What happens if you remove it?
It doesn't actually hurt it. It's used to direct the airflow through the PSU from front to back. Notice how it only covers right where the exhaust vent is on the back? It was a lot more common(might still be) on the older psu's like my old thermaltake tp 750.
 
On page 3 you have a picture of the top fan. Clearly visible is the transparent plastic shield covering perhaps a third of the fan. This must reduce the cooling significantly. I'm surprised you didn't mention it. Why is it there? What happens if you remove it?

No it doesn't. It is there to direct airflow as it is in every unit that uses one.
 
Is the 120mm fan a standard thickness?

I know it's not necessary (or at all recommended), but I'm curious as there are some of us who like to replace the PSU fans.

Thanks and great review!
 
Is the 120mm fan a standard thickness?

The fan used in the SX800-LTI is thinner at 15mm vs. standard 25mm thickness. Currently in terms of performance/air pressure, noise level, and starting voltage for semi-fanless usage, there are no better fan in the same size (that we can find).
 
That's awesome, thank you for the quick reply!! I'm sure it is quite a good fan.

Noctua is releasing a 15mm thick 120mm fan soon so I was curious.
 
Nice! This puts a lot of confidence in the SFX-L stuff I plan to put in my next rig :D

Solid [H]ard work!
 
Isn't this the Lian-Li PE-750 right down to the low rated 85C caps? I remember a comment from Silverstone about that and was expecting them to use better ones.
 
How does the fan speed compare to the SX700 at the same load?
Looking at running it with a 7700k and a 1070, so roughly 250-300 watts.
 
How could this be used for a ThreadRipper build...?

Every X399 motherboard I have looked at has either dual 8-pin EPS connectors or a single 8-pin & a single 4-pin EPS connectors...

But this PSU has a single 8-pin (4+4) output for EPS...?

Am I missing something obvious, or is there no SFX-L PSU solution for a ThreadRipper build...?

And for any who have the go-to answer of using an ATX PSU, the chassis I would build ThreadRipper in does not support ATX PSUs, only SFX or SFX-L...

NCASE 'M5' ATX chassis

Thanks...!
 
There are 8 pin PCIe to 8 pin EPS converters with proper 18 AWG wire spec'd at 10A -- 360W per connector. That is more than enough :)
 
There are 8 pin PCIe to 8 pin EPS converters with proper 18 AWG wire spec'd at 10A -- 360W per connector. That is more than enough :)
Correct. Almost all high-end PSUs have this ability now days. Heck, I have a 10 year old Thermaltake Toughpower here that has the needed plugs at spec. Actually that is what I used for testing.
 
So with the PSU in question, that would mean you have to run both 8-pins on the GPU off of a single cable? Would this PSU support 350+ watts off of a single cable?
 
SilverStone has updated this product with a change to a ball bearing fan which you can see updated in the review.
 
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