getting ready for dual 5090, Functional protype on dual 4090

[AnotherReader]

This is an amazing build. The dual 4090s are cheaper than the RAM and storage, let alone the CPUs

 

[venturi]

Some updates:

 

[Solaris17]

Do you have a link to that nvlink bridge?

 

[venturi]

Do you have a link to that nvlink bridge?

There is no nvlink bridge, no longer necessary

that cable you are seeing on the picture for the cards is a pcie 5.0, 15cm riser cable because my cards are placed upside down so air is blown out, rather than blowing warm air towards the motherboard or towards the CPUs, seemed a more logical approach

 

[venturi]

 

[venturi]

I posted this in the driver thread, but it kinda belongs here with this project:

On a less serious note, here is a fun side of this project

Chernobylite Game

using 1 GPU - everything including ray tracing set to ULTRA, no DLSS

and now 2 GPU (no SLI, no nvlink, using mGPU, DX12) everything including ray tracing set to ULTRA, no DLSS

 

[DemonicRyzen666]

I posted this in the driver thread, but it kinda belongs here with this project:

On a less serious note, here is a fun side of this project

Chernobylite Game

using 1 GPU - everything including ray tracing set to ULTRA

View attachment 363653

and now 2 GPU (no SLI, no nvlink, using mGPU, DX12) everything including ray tracing set to ULTRA

View attachment 363655

Wait ?!?!?!?
I have this game from G.O.G, but i could not get mGPU to work in DX12? S.l.I works fine for me in Dx11 for me
Maybe i have to disable s.l.i on my two 2080 ti's for DX12 or set it for single card in the nvidia control panel

 

[xtreemchaos]

what can i say its fantastic, a work of art, move over Michelangelo's David.

 

[venturi]

Heatsink and cooling updates:

Well,

those coolers are on revision 4, going on 5 and work well, especially with some of the threaded algorithms I use, hammered at all core the temps have been manageable and no issues. Don’t let the outside fool you. The base plate of the heatsinks is now all copper, nickel clad frame, the fins have been individually placed on the heat-pipes, pasted, and been mindful of full contact. and has increased in thickness to 5mm, the the 6 heat pipes are pressure grabbed and have Metal based TIM in the micro gap areas to improve contact, the fans can spool from 450 to 3050rpm, the BMC fan curve has then at 100% at 75C, but according to the BMC logs that has yet to ever occur even under an all core load.

Here is the fin protype and base that is going on next. I have increased fin density as well:

 

[venturi]

Hot gigabit chip:

the dual / tri gigabit chip gets toasty like 90C toasty with the flimsy aluminum coin of a heat sink

so had to move to home made all copper

before final cleanup up and deburring

slight acid dip tp increase porosity and surface area, and then
need to color match of course, this works on copper

final product:

The result , from using netter TIM, moving to copper, increasing fins and surface area:
52C (down from 90C), mission accomplished

 

[venturi]

result of the heat sink effort

Happy PC

 

[Arco]

Me likey. Do I want server CPUs? Yes. Do I need server CPUs? No.

Also how did you connect the u.2 drives on this bad boy. Mcio 8i to u.2?

 

[igormp]

Man, that's a hecking nice build.

Sometimes I think about moving to an used Epyc cheap so that I could have more RAM, but then I think about its idle power consumption and give up instantly. For me it's cheaper to just spin up a cloud instance for the not-so-often moments where I need more RAM/vRAM.

 

[venturi]

Me likey. Do I want server CPUs? Yes. Do I need server CPUs? No.

Also how did you connect the u.2 drives on this bad boy. Mcio 8i to u.2?

Amazon

https://www.amazon.com/gp/aw/d/B0D9J8GVZX?psc=1&ref=ppx_pop_mob_b_asin_title

PCIe 5.0 MCIO x8 to 2 x SFF-8639​

 

[chrcoluk]

Sepheronx - Canada? I want to live there! - can I move in with you? I have expensive taste and need a sugar daddy.



Side note, the rig was expensive but not what one thinks:

the board and cpus, are new (oem eBay deals) but the drives, video cards, psu, etc were from the prior dual Xeon build.

the prior Xeon build was new board and cpus and used prior components from earlier build etc

each build was built from what was already available / owned when possible

rinse repeat

some prior piggy-back components and builds of mine going back from last year all the way to 1999
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That case with the four geforce RTX upright, I wonder if will become a future standardised design given the current problems with fitting the giant Nvidia GPUs in standard towers.

 

[venturi]

So next on the to do list is to replace the other cheesy lightweight short small heatsinks for the Mosfet / voltage regulators etc that came with the board. This time I was able to find them halfway across the globe and specific to this board:

 

[vvkvvkvvk]

The PC is neat and tidy, but dang. Twin Eames chairs? Nice.

 

[venturi]

The PC is neat and tidy, but dang. Twin Eames chairs? Nice.

because... you never know?




so I added the upgraded heatsinks, overall result nothing too spectacular, those components are running 7-12C cooler, so I think it was worth the effort:

combined with the edited/improved cpu coolers, the cpu heatsinks have a a full copper plate to completely cover the supersized 9684x's footprint

The copper plate is 5mm thick

heatpipes and fin adhesion was improved

more fins were added to the full 120mm

combine with 350-3000 rpm phanteks t30

and outcome (quiet silent and cool running, even under load its not obtrusive)

 

[csendesmark]

venturi said:
4090s mounted inverted so that warm air is blown away from CPUs and motherboard:

Amazing config!
Can you tell me some info about your PCIe riser cable?
I might go on a similar path, for my next GPU, keeping the heat away from the rest of the rig.
Planning use one cable for the first PCIe 16×, since it is unlikely that anyone will create a 5090/5080 series Geforce which can fit into 3 slot, and even I find one it will suffocate and overheat
While I would like to use the other cards in the second and third slot.

 

[venturi]

Amazing config!
Can you tell me some info about your PCIe riser cable?
I might go on a similar path, for my next GPU, keeping the heat away from the rest of the rig.
Planning use one cable for the first PCIe 16×, since it is unlikely that anyone will create a 5090/5080 series Geforce which can fit into 3 slot, and even I find one it will suffocate and overheat
While I would like to use the other cards in the second and third slot.

Sure,
they are PCIE 5.0 and amazon has them in various length and directions

beyond keeping the GPU away from the CPUs and board, the real consideration is having it suck cool air and blow hot air away from the CPUs and board, hence mine are actually angled differently for the PCIE cables - details

here are links for you sir

J

https://www.amazon.com/gp/product/B0CC3VPRC7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

https://www.amazon.com/gp/product/B0CV62HWLN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

 

[csendesmark]

they are PCIE 5.0

Even comes in PCIe gen 5! Perfect!
I spent some hours finding *this*, but amazon's search is a##
Thank You!