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affordable computer for flow simulations in FLUENT

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Old   January 23, 2020, 18:37
Default affordable computer for flow simulations in FLUENT
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Hi all,
I do the ANSYS FLUENT simulations. What is the optimal modern computer to buy with budged $5000 - 10000? OS is Window 10.
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Old   January 25, 2020, 13:23
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Currently the best (to be more precise: fastest) workstations for this type of application is powered by one or two AMD Epyc 2nd gen CPUs.
But with Ansys Fluent the first question always has to be: how many cores can you use with your license.

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Old   January 27, 2020, 15:29
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I have 4 cores with my license
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Old   January 27, 2020, 15:47
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Then you won't have to use all of your budget. The fastest configuration for 4 cores is a Core I7-9800X, paired with some fast memory (DDR4-3600 or more) in quad-channel.
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Old   January 28, 2020, 10:45
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thank you very much
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Old   January 30, 2020, 12:14
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you and other expert recommended: i7-9800X (you) and i7-8700K (other expert).
Is that close?
Also, we want to have 128GB, instead 64GB. But vendor said:
"Dell states that we will not be able to do 128GB RAM unless the customer changes the processor from i7 to XEON PROCESSOR. The 128GB RAM only comes as 128GB (4X32GB) 2666Mhz UDIMM ECC memory and for ECC memory to be supported, the customer has to go with a xeon processor"
Is it good for us?
And what your opinion about Ryzen 7 2700X(8 cores)?
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Old   January 30, 2020, 13:22
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Quote:
Is that close?
Not close. I7-9800X is a HEDT chip with quad-channel memory controller. I7-8700k is a mainstream CPU with dual-channel memory controller. There is a good reason why I did not recommend any mainstream CPU with dual-channel.

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"Dell states that we will not be able to do 128GB RAM unless the customer changes the processor from i7 to XEON PROCESSOR. The 128GB RAM only comes as 128GB (4X32GB) 2666Mhz UDIMM ECC memory and for ECC memory to be supported, the customer has to go with a xeon processor"
The I7-9800X supports up to 128GB of DDR4 UDIMM, even by Intels specs https://www.intel.de/content/www/de/.../i7-9800x.html
As a side note: with the right motherboard and bios, it could handle much more than that: https://wccftech.com/asrock-x299-mot...upcoming-bios/
As for support of 32GB UDIMMs... I am not 100% sure. But there is always the possibility to use 8x16GB, as long as you get a motherboard with 8 DIMM slots.
But all of this is a moot point if you have to buy from Dell. You will have to take what they offer. And memory overclocking won't be possible anyway. The I7 was kind of the budget oprion compared to a similar Xeon. It is cheaper, and with higher memory speed, it is also faster. But when buying from Dell, the budget character of the configuration is lost anyway.

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And what your opinion about Ryzen 7 2700X(8 cores)?
Don't buy it.
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Old   February 3, 2020, 19:20
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what about:

AMD 3960X 24 core Processor
128 GB DDR4 RAM 3600 MHz
Nvidia Quadro P2200 Graphics
2TB m.2 NVMe SSD

?
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Old   February 4, 2020, 03:43
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Sure, why not. Maybe it will be a few percent faster than a Core-I7-9800x for your requirements.
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