cotter32
The oddity is that the GPU temp. is cooler when run on auto aggressive, than on 100% speed .
The difference being 74C vs 81C .  It's also repeatable .
Is it possible that the fans cavitate at 100% speed ?  Air recirculation ?

Nice build!  I applaud your patience, I don't have enough patience to work in a horizontal case anymore - other then the Corsair Air 540 in horizontal orientation.  Far too cramped for my liking.  Though eventually I want to build a small rack mount system with a nice horizontal tray... tray being the operative word... nice large open space tray, easy to work with, plenty of room, etc....  Rack mount to house computer & 2 battery backup units for up to 90 minutes backup time!  Still a long way off on that one.
 
Interesting finding with the fan speed, turbulence is the word you're looking for btw, cavitation happens within fluids & there's no direct equivalent phenomenon in aerodynamics.  The higher the air speed, the greater the possibility for turbulence especially with 3 fans very close together.  I'll have to do some testing of my own, though I won't see that much drop in temps, even at 225MHz overclock my 4070Ti barely tops off at 65C in Kombustor with a half hour run vs 58C at stock speed - both are when fan is manually set to 100%.

 
Thanks SM-71, and Delirious .  It did take patience .  Luckily, I had 3 weeks while I waited for my cables to arrive .
SiverStone didn't make it any easier with their over-size drive cage either, but it's nice when it's done .
The whole thing measures only 17 1/2 x 17 1/2 x 7 inches on the desk .  It's meant to be able to sit
on a stereo rack .  If I remember correctly there are even some handles for it around here somewhere .
As for my GPU fan oddity, I suppose it could be caused by my case not being tall enough .
There is only about 1 1/4 inches from the edge of the Graphics card, to the bottom of the case lid .
 
P.S. SM-71, that's a pretty maxed-out EVGA Z370 board you got there 
 
Too The Moon !
 
 

A very nice horizontal build, which is very rare, 

I was thinking of a stand up case with the PSU on the bottom so looking at it I was thinking the side fans blew in. With the compression on the site, it's really hard to see the arrow on the fans.

SM-71 and Hoggle, I think you guys are right .  I am getting hot air recirculation at 100% GPU fan speed .  Too close to the top of the case :(
This machine does have its limitations, but luckily I don't use 100% GPU fan speed much anyway .  Mostly just gaming, and general use desktop .
For that everything stays nice, and cool, and runs good ... and it gives me a place to set my printer on top of :)   Thank you both for your thoughts .
SM-71, your new computer is great, BDRW drive, too .  Appealing 
... and now, back to Resident Evil 4, ( Sajin approved ) .
 
Too The Moon !
 
 

Okay I know the cables are suspended away from the fans.  Nice touch running it along the fan guards.
They're still interfering though, with the CPU cooler.
The area around the 24-pin plug.
I'd look at tucking it in the opposite direction so that it's folded down between the motherboard tray and the fans toward the front.
I don't know how taut some of those cables are, but it looks like you have enough to simply route them along the top/back of the fans with as little interference as you currently, simply by strategically taking up the slack.

charlesborner, Thanks for noticing .  You are right to say that the ATX cable interferes with air going to the CPU cooler; it does,
but it's still about 3/4" from the cooler after final install .  I'm not too worried though because the CPU cooler gets air from the
two 120mm side fans right next to it .  It's the one really nice thing about this case .  The CPU power cable takes a path pretty
much exactly as you suggest .  It has to since it is only just long enough to make the trip :)
As for the ATX cable, first I have to say I was very reluctant to change it at all since it is hard as iron, and I had to rebend it at
the 24-pin plug end nearly 180 degrees .  But it survived .
I think the ATX cable kind of goes as you suggest toward the back ( front of case ) .  This will be hard to describe, so I will use
a couple of pictures I had previously rejected for poor quality .  Appologies in advance .
c
Below is the ATX cable looping almost to the front of the computer .  After the drive cage is in it goes forward even a little more .

c
Below is ATX cable final position up against the forward end of the drive cage .

c
If you look past the end of the graphics card above you'll see a shelf sticking out from the bottom of
the drive cage toward the viewer .  It has gray/black rubber on top of it, and a shiny painted edge .
It over-laps the front edge of the gray fan .  The cable loop can settle on that, but it won't .  Too stiff .
Below is an old pic of the inside of the drive cage .  The graphics card, and cables go in the center bay .

The above drive cage is turned around 180, then installed in the case shown behind .
Hah, sorry for being so long winded :)
 
To The Moon !
 
 
 

Nice results, Congrats

Thank you donta1979, Delirious, and Cool GTX .  I had a lot of fun with this one .
Now that this post is back from the recycle bin I'm deleting the other one
to save space .  It's all duplicate info. of what's here .
 
Too The Moon !
 
 

... and Cooler still .
I had one more card to play in the lower the temps. game,
so I pulled off the case air filter screens, took the printer off the top,
and scooted the machine to the corner of the end table it sits on that
is farthest from the wall and desk .  Then ran the same TimeSpy Extreme
test as above at 4K and 5 Ghz .  The results were good, so I used Precision X1
slider controls to increase the power, and frequency levels of the GPU for a better
TimeSpy Extreme score as seen below .
c

c
Maximum GPU temp. is down to about 61C, and CPU temp. range is about 68 to 73 C .
I have to say EVGA's XC3 GPU cooler works really good .  You just have to get some air
to it .  The same for the Thermal Right 135 Silver Soul CPU cooler .
Well, that's probably about it for this 5 year old mother board .  Not much more up grade possible .
So, now I'll probably have to turn my attention back to my "new" Gigabyte Z690 computer 
 
 
Too The Moon ... on Liquid Metal, baby .