A Detailed Look (Cont’d)
The Seasonic Snow Silent-750 comes with a good assortment of modular cables. All of the cables except the 24-pin ATX power cable are the flat, ribbon-style cables. (Note: cable lengths are listed in the Specifications box, back on page 2.)
(Courtesy of Seasonic)
Here are a few photos of the Seasonic Snow Silent 750W power supply showing the components and internal layout. As you can see, components are neatly laid out with good spacing for optimal airflow.
Once inside, we see the design of the Snow Silent-750 is very similar to other top-tier Seasonic power supplies. The main differences between the Snow Silent 750W and the Seasonic Platinum 760W are as follows:
• Platinum 760W has an extra 10W output (on +12V)
• Silent Snow chassis is 170mm deep vs the Platinum 760W at 160mm
• Different fans: Silent Snow-750 uses Hong Hua and Platinum 760W uses Sanyo Denki
• Hybrid Silent Fan Control uses a slightly modified profile
The Seasonic XP2S platform incorporates a modern topology that delivers tight voltage regulation, high efficiency and low AC ripple on the DC outputs. The primary side incorporates a full bridge rectifier and resonant LLC converter for zero voltage, lossless switching, while the secondary side uses a synchronous rectifier design with DC-to-DC converters on the X-Connect board for the +3.3V and +5V outputs. All of the capacitors are high-quality Japanese made components with predominately electrolytics on the main PCB and solid polymer caps on the X-Connect board. The two primary capacitors are made by Nippon Chemi-Con and rated for 270uF, 420V, and 105°C.
The only thing I would like
The only thing I would like to see is 2-4 fan headers for semi-passive case fans.
Also 15-20% passive operation threshold (X-series) makes more sense then 50% as it is kind of hard to dissipate 375W out of the case without a fan.
I’m sure that you’re mistaken
I’m sure that you’re mistaken about the 375 watt dissipation. At 92% efficient, it would be something like 30 watts, before the fan kicks on.
I have had zero issues with any of the Seasonic power supplies that I’ve purchased and have an older 750 watt model in my main rig. I would definitely consider something like this for a future high-end build.
Exactly. The rest of the heat
Exactly. The rest of the heat is energy used by the PC though it would be more than 8% heat dissipated by the PSU since it would suck some heat back into the power supply.
That’s why it is also based on the temperature.
I was talking computer case
I was talking computer case not power supply case. If you deliver 375W to power your computer you need to get rid at least this amount of heat from the computer case.
Would it be easy to swap the
Would it be easy to swap the fan out for something like a Noctua? I believe some of their 140mm fans work in 120mm openings.
Why would you do that when
Why would you do that when one of the main reasons is to get the special fan? Does Noctua even make fans or do they just rebrand too?
Very nice, but why is it
Very nice, but why is it upside down? Everything is oriented as if the fan is expected to be pointing up, but in almost all cases it will be installed with the fan pointing down. Old cases put the PSU above the CPU with the fan down, and modern cases put the PSU at the bottom with the fan pointing down to pull in outside air from underneath. Why would they be expecting the fan to usually point up?
Valid question is why there
Valid question is why there are so few cases where motherboard is turned 90 degrees.
Actually, there might be more
Actually, there might be more people than you think installing the PSU with the fan up (myself included). With a PSU mounted in the bottom of an ATX case with the fan up – it adds to overall case cooling. This can help suck warm case air out of the sometimes stagnant area below the GPU card. The trade-off is causing the PSU to run a little warmer than it would with the fan down (sucking cool, outside air) but good PSUs like the Seasonic, are rated for up to 50 deg C operation. Not for everyone, but a good option for some.
The fan is sucking air in,
The fan is sucking air in, not pushing air out. It’s blowing over the internals of the psu. If it was installed on the top of a case it would act as an exhaust. Which would be optimal as heat rises.
At page 3, I think that fan
At page 3, I think that fan curve hysteresis is actually increased. Reducing hysteresis actually increasing the frequency of fan switching on-off when temperature is near equilibrium at setpoint.