Build Advice Suggestions on PC Build

[Gebhard]

Hi
I need Suggestions for some parts since it's a bit different built than usual
The primary use of this PC is going to be for FEA softwares such as COMSOL and ABAQUS and other softwares like MATLAB and little bit of gaiming from time to time.
The Budget Range for this pc is going to be around 1500 USD.
The parts that I need are CPU , MOBO , RAM , PSU , CPU Cooler , NVMe SSD
Now here are the problems:
GPU : Since I'm going for RTX 50 series I will temporary use a GTX 1070 and wait for 5070 or 5060Ti Since it's probably going to have more VRAM than 5070. The reason I'm not going for AMD is Because of CUDA Core. So for that reason I don't need GPU in this Build as of right now.
CPU : As for CPU It's a bit complicated. A Ryzen 9 9900x is probably sufficient but Intel 285k/265k provide better performance in COMSOL than Ryzen 9900x and even 9950x but since Intel CPUs don't seem to be stable enough it doesn't seems to be right choice for CPU.
RAM : 128 GB Ram is enough for the tasks in FEA softwares but there is a problem. I'm not going for a 128Gb kit right away. I wanna get a 64 GB(2*32GB) for now and then upgrade it to 128 Gb when the GPU comes in. Since it's going to be 128 Gb Ram probably only 5400-5600 kits are going to be stable(I'm not sure about this but I want the Rams to be as fast as possible with best timings) it should be a 32*4 kit.
MOBO : There are many brands with X870/870E chipset so It doesnt matter which one really. Maybe something like MSI MAG X870 TOMAHAWK WIFI is good enough for this build but I want more alternatives for MOBO.
PSU : Cooler Master MWE Gold 850 V3 850 W doesn't seems a bad choice but what are other alternatives?
Case : I already have a Cooler Master MasterCase 5 Pro in good condition so I'm going with this case for this build.
NVMe SSD: 1 Tb NVMe SSD is good enough but I already have some other Storage as well so I dont need more than that
https://pcpartpicker.com/list/q9D7wY
CPU Cooler : CPU Cooler is kinda puzzling me . Since I'm thinking about Ryzen 9 9900X A 360 AIO is more than enough but the Case I already mentioned needs to be modded for 360 AIO so I'm not going for 360 instead a good 240 should is enough. But then again since PC is going to be on for 24/7 for some analysis , can an AIO cool a 70/80 C CPU for such a long time without a problem? Like Pump failing or radiator leaking. This kinda make Air Cooler better choice but for this CPU a Bigger than average Air Cooler is needed. Won't it cause space problem for 4*32 Ram kit?
I appreciate your suggestions

 

[Lutfij]

CPU : As for CPU It's a bit complicated. A Ryzen 9 9900x is probably sufficient but Intel 285k/265k provide better performance in COMSOL than Ryzen 9900x and even 9950x but since Intel CPUs don't seem to be stable enough it doesn't seems to be right choice for CPU.
Kind of self explanatory by what you've said;
If you're looking for stability while under load or none thereof, you should look at AMD's offering with the processor.

Ram: I would ask you invest in the ram in one go, if you want to split the purchase for your ram to lead up to 128GB, you should avoid Corsair memory since they source IC's from multiple vendors and are the only brand of ram out there that have a PCB revision number on their sticks of ram. People have mentioned instability when working with two different PCB ram kits even though they came from the same series and were visually identical.

Motherboard: What are you looking for in your motherboard purchase, besides the VRM being more than adequate for the processor?

Cooler: You can get away with a beefy aircooler akin to the Thermalright Peerless Assassin 120 SE;

Dual Towers – Thermalright

www.thermalright.com

but a 360mm isn't a bad route to take.

PSU: What other alternatives do you have at your disposal? This leads me to ask, where are you located? What is your preferred site for purchase?

 

[Misgar]

can an AIO cool a 70/80 C CPU for such a long time without a problem?

I'm not sure where you're getting the 70/80°C figures from. The 9900X/9950X may boost up to 95°C under really heavy loads. I've had my 7950X running in the low nineties Centigrade for hours on end under a Noctua NH-D15.

If you don't want to "waste" money on a Noctua cooler, the Thermaltake Phantom Spirit 120 has 7 heatpipes, whereas the Peerless Assassin 120 has 6 heatpipes. I have several rigs using Thermaltake air coolers and they perform well.
https://www.tomshardware.com/reviews/thermalright-phantom-spirit-120-review

instead a good 240 should is enough

I'm not sure I'd be happy with a 240mm AIO. This test shows a 9900X running Handbrake dissipating 215W with PBO enabled, but a much more reasonable 158W without PBO. The choice is yours. A lot more heat with PBO for a small speed gain or slightly longer render times at lower power.
https://www.tomshardware.com/pc-components/cpus/amd-ryzen-9-9950x-cpu-review/4

Won't it cause space problem for 4*32 Ram kit?

Not unless you've "skimped" on case height. I simply raise the front fan on dual-tower coolers by a few millimetres to clear the top of the RAM.

Since it's going to be 128 Gb Ram probably only 5400-5600 kits are going to be stable

You may need to run 128GB (4 x 32GB) at 4800MT/s or even slower. Check out as many reviews and forum posts as possible about RAM/mobo compatibility issues, before buying a 128GB kit (in one go). You'll find people with unstable 128GB systems on this forum.

I have an old Xeon quad channel CPU with 8 DIMM slots on the mobo. It accepts UDIMM, RDIMM and LRDIMM. It's often easier to achieve stability with large amounts of RAM on a Xeon, Threadripper or EPYC system, but at significantly greater cost. If you think you might need more than 128GB at any time in the future, consider this approach.

 

[Gebhard]

Kind of self explanatory by what you've said;
If you're looking for stability while under load or none thereof, you should look at AMD's offering with the processor.

Well for this build I had 9900X in mind that's why I was looking for x870/E motherboards but it's just intel 265K/285K are better than Ryzen 9 99XX in COMSOL.
With that being said what are the stable speed ram for 128 GB ? I think it shouldn't really be possible to go more than 5600 for speed .

Ram: I would ask you invest in the ram in one go, if you want to split the purchase for your ram to lead up to 128GB, you should avoid Corsair memory since they source IC's from multiple vendors and are the only brand of ram out there that have a PCB revision number on their sticks of ram. People have mentioned instability when working with two different PCB ram kits even though they came from the same series and were visually identical.

I'll try to do that.

Motherboard: What are you looking for in your motherboard purchase, besides the VRM being more than adequate for the processor?

There isn't really a specific feature , just that it should have Q Code Display and have room for Storage expansion. What I'm looking in a motherboard is stability with a fast 128 Gb ram. I may also tweak with CPU clock based on the thermals and performance.

Cooler: You can get away with a beefy aircooler akin to the Thermalright Peerless Assassin 120 SE;
but a 360mm isn't a bad route to take.

Thermalright Peerless Assassin 120 SE does seem to be a good choice with that price if I go with Air Cooler

I'm not sure where you're getting the 70/80°C figures from. The 9900X/9950X may boost up to 95°C under really heavy loads. I've had my 7950X running in the low nineties Centigrade for hours on end under a Noctua NH-D15.

If you don't want to "waste" money on a Noctua cooler, the Thermaltake Phantom Spirit 120 has 7 heatpipes, whereas the Peerless Assassin 120 has 6 heatpipes. I have several rigs using Thermaltake air coolers and they perform well.
https://www.tomshardware.com/reviews/thermalright-phantom-spirit-120-review

Those figures are based on a 360mm in blender but as you've mentioned they will boost to 95 C.

I'm not sure I'd be happy with a 240mm AIO. This test shows a 9900X running Handbrake dissipating 215W with PBO enabled, but a much more reasonable 158W without PBO. The choice is yours. A lot more heat with PBO for a small speed gain or slightly longer render times at lower power.
https://www.tomshardware.com/pc-components/cpus/amd-ryzen-9-9950x-cpu-review/4

I don't think PBO will make the gain justifiable when Thermal/Power are taken into consideration when running a heavy job in FEA

You may need to run 128GB (4 x 32GB) at 4800MT/s or even slower. Check out as many reviews and forum posts as possible about RAM/mobo compatibility issues, before buying a 128GB kit (in one go). You'll find people with unstable 128GB systems on this forum.

I have an old Xeon quad channel CPU with 8 DIMM slots on the mobo. It accepts UDIMM, RDIMM and LRDIMM. It's often easier to achieve stability with large amounts of RAM on a Xeon, Threadripper or EPYC system, but at significantly greater cost. If you think you might need more than 128GB at any time in the future, consider this approach.

128 GB is optimal for almost all of the models I plan to analyze . Of course for large models we use Threadripper but this isn't the case here.
I've seen stability problems with Ryzen 99XX with 128 GB. After conducting different tests they weren't stable at all. That's why I wanted to see the best possible spec for 128 GB ram/Mobo for Ryzen 9 9900X.