Poor Newegg Review For Gigabyte PS Gets Funny Response FromManufacturer

  • Thread starter Thread starter ShadowTek
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For my last upgrade and migration I used a couple of Antec 300s, and
have no problem with them or the fact that the PSU is on the bottom of
the case. I think the large fans on the top and at the back corner, setup a
very good airflow, better than what a PSU at the top would provide.

http://www.newegg.com/product/product.aspx?Item=N82E16811129042
Click to expand...

I remember looking at that one. I considered it, but I decided on a
full-sized tower.

http://www.newegg.com/Product/Product.aspx?Item=N82E16811517004
 
Dave said:
Many computers were cooled with only one cooling fan. That is the one
that was mounted on the back of the power supply. Air would be pulled
through the case, then through the power supply, then exhausted out the
back of the power supply. Therefore it made sense for the bottom/back
of the PSU to be mounted as high as possible in the case. That's the
direction all the hot air was going anyway, so it made cooling more
efficient to have the PSU way up top.

The PSU still assists somewhat in cooling the case...and more
importantly the components in the case. The only advantage to having
the PSU bottom mounted is that the PSU fan will be drawing more cool
air into the PSU itself. In turn, this means you need a shitload of
airflow to cool the case (and components like the northbridge, CPU and
GPU in particular), because much of your cool intake air is now going
down low where it's not cooling a damned thing. -Dave
Click to expand...

There is an equation, to work out what a shitload is.

CFM = 3.16 x Watts / Delta_T_degrees_F [ Formula for case cooling ]

If the entire contents of the computer case dissipated 200W
(components and PSU waste heat), and you wanted to meet the
"well cooled" criterion of 7C difference between case and
ambient (7C = 10F), then the equation gives you

CFM = 3.16 * 200 / 10 = 63.2 CFM

That amount of air can be moved by a single fan.

If you allow a larger delta_T, it means the components in the case
will have a hotter environment to work in, your hard drive gets
warmer and so on. You don't have to shoot for 7C if you don't want to.

Paul
 
In message <[email protected]> "Dave C."
You need a shitload of extra fans (adding extra noise) to
counter-balance the fact that much of your cool intake air is going in
the wrong direction to cool anything. -Dave
Click to expand...

A "shitload"? One 120mm fan will push more air then a 80mm (or even
120mm) which needs to push air through the PSU.

In addition, you get lower average temperatures, so your fans (both on
the PSU if it's temperature regulated) and the one you install at the
top of your case can run at lower RPMs.
 
I had a bad experience with a Gigabyte power supply that I bought from
Newegg, so I posted a review of it reflecting my opinion of it. The
manufacturer's response seemed humorous, so I thought you might
enjoy it.http://www.newegg.com/Product/Product.aspx?Item=N82E16817233010
Click to expand...

Like another posted earlier, you indeed were fortunate enough to have
your review posted by Newegg. I had mine rejected for posting that the
item was defective. At least they had the decency to reply back and
tell me this was the reason.
 
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