Few questions about smicha's watercooled 7 gpu build

[jeunack]

Thank you all for all help to the build.

Some notes:

1. Even a 28 laned cpu is fine with dual PLX mobo for 7 gpus
2. The only drawback of i7 mobo as asus is lack of asus support for custom bios with 4G enabled that is why I go with dual xeon and Asrock/Supermicro.
3. Dual xeon give 80 lanes so there is no risk of PLX failure.
4. Aquacomputer single brackets are fine - I am waiting also for their delivery

Going back to unpack fresh delivery with tons of watercooling stuff - stay tuned

Thx I'll follow your advise

For the GPU, you have sometimes 150 euros difference between two 1080ti depending on the constructor.
Is it matter for octane performance ? Do you have the same OC possibilities when they are all watercooled ?

[itou31]

Hi,
Here are some update of my 7GPU rig based on same motherboard.

Rendering preview (sorry in keyshot)

And mounting 7GPUs block and box

[itou31]

Final rig,
Tested and running OK.
Thanks to Smicha and Tom for advices.

[glimpse]

Nice! What temps You're getting, Itou31?

so "7 is new 4"? =)

I mean before quad GPU was the best & now hepta builds seems to be the way to go!

[rappet]

Wow... Fantastique.
That is a compact build... a Bulldog of a pc!. Enjoy.

[smicha]

Very nice itou!

After one of my 7x gpu build I definitely recommend one more thing - due to super heavy weight of gpus - at least 5+ kg for waterblocks only horizontal mobo layout is very highly recommended for transportation. Moreover almost all available cases are made of thin 1mm steel and any shock to a case will bent backside where IO brackets are mounted.

Here is my sketch of upcoming this week 11 gpus in 3mm alloy case.

[glimpse]

Vertical layout might be less of an issue if You use reinforced PCIe slots, but for shipping laying motherboard flatly is a must.

I've been shocked how much 4x Single slot modded GPUs weight - 7 of them is way too much to handle for fragile motherboard & crappy case (that were never designed for such use in the first place).

[itou31]

Yes, the weight of these 7 GPUs reminded me to make the reinforcemment under the hepta terminal (place to locate the octane logo).
So temperature is better than my 4GPUs build. With ambiant temperature at 22°C, the max reached at an octanebench is about 47°C on the hottest GPU. In rendering daily task (PT kernel), up to 50°C, but ambiant is hotter too.

here is my old "4" beside my new "7"

[jeunack]

Really Nice Job itou31 !
7 gpus would be very confortable with Octane
I ordered my pieces for my build, can't wait

[itou31]

Did you go dual CPU or single ?