EPYC 7351, 7451 or 7601 for CFD, which is the best?

bravebear · May 29, 2019, 05:48

I'm planning to set a new 2 CPUs workstation.

The major configurations:
RAM: 16GB 2R DDR4-2666 ECC*16
SSD: Intel 760P 512GB M.2
MB: Supermicro
Video card: second-hand Quadro 6000.

What I'm not sure is the selection of CPUs...

I ran my cases on the test machines provided by local vendor, 7601*2 and 7451*2. It was 10% faster on the 7601 platform with 56cores utilized than 7451 platform with 40 cores assigned. I have no chance to test 7351.

Price of 7601 is almost doubled the price of 7451 ($2300 vs $1200), 7351 is 40% cheaper than 7451 ($700 vs $1200). Though all options are within the budget, I'm wondering which CPU would bring the highest cost-effectiveness ratio... So that I may upgrade the SSD or 10G ethernet.

Thank for the suggestions in advance.

RobertB · May 30, 2019, 16:20

There is a thread on here that looks at a bunch of different configurations.

OpenFOAM benchmarks on various hardware

Alternatively if they are not covered there then Specfp_rate for a similar system to those you are considering is generally pretty accurate in assessing relative performance of similar architecture systems.

The_Sle · May 31, 2019, 05:58

Surely the most cost-effective one is the 7351. Returns start diminishing after 2 cores/memory channel. Could you get the high-speed 7371? Those might be as fast as the higher core count CPU:s, while being a lot cheaper. As a bonus they are supreme in single-threaded applications

May 29, 2019, 05:48	EPYC 7351, 7451 or 7601 for CFD, which is the best?	#1
bravebear New Member Guangyu Zhu Join Date: May 2013 Posts: 12 Rep Power: 12	I'm planning to set a new 2 CPUs workstation. The major configurations: RAM: 16GB 2R DDR4-2666 ECC16 SSD: Intel 760P 512GB M.2 MB: Supermicro Video card: second-hand Quadro 6000. What I'm not sure is the selection of CPUs... I ran my cases on the test machines provided by local vendor, 76012 and 7451*2. It was 10% faster on the 7601 platform with 56cores utilized than 7451 platform with 40 cores assigned. I have no chance to test 7351. Price of 7601 is almost doubled the price of 7451 ($2300 vs $1200), 7351 is 40% cheaper than 7451 ($700 vs $1200). Though all options are within the budget, I'm wondering which CPU would bring the highest cost-effectiveness ratio... So that I may upgrade the SSD or 10G ethernet. Thank for the suggestions in advance.

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May 30, 2019, 16:20		#2
RobertB Senior Member Robert Join Date: Jun 2010 Posts: 117 Rep Power: 16	There is a thread on here that looks at a bunch of different configurations. OpenFOAM benchmarks on various hardware Alternatively if they are not covered there then Specfp_rate for a similar system to those you are considering is generally pretty accurate in assessing relative performance of similar architecture systems.

May 31, 2019, 05:58		#3
The_Sle New Member Join Date: Jan 2018 Posts: 7 Rep Power: 8	Surely the most cost-effective one is the 7351. Returns start diminishing after 2 cores/memory channel. Could you get the high-speed 7371? Those might be as fast as the higher core count CPU:s, while being a lot cheaper. As a bonus they are supreme in single-threaded applications