Ansys Mechanical Benchmarks Comparing GPU Performance of NVIDIA RTX 6000 vs Tesla V100S vs CPU Only

In this blog, we examine Benchmark results for Ansys Mechanical on NVIDIA GPUs. According to Ansys: "Ansys benchmarks provide comprehensive and fair comparative information concerning the performance of Ansys solvers on available hardware platforms. The benchmarks can be used to compare the performance of different hardware platforms when running Ansys solvers. To accomplish this goal, Ansys provides the suite of simulation cases that make up the Ansys benchmark suite to its hardware partners for their use in benchmarking hardware performance; then the data is reported to Ansys and compiled for this site. Cases are selected to represent typical usage and cover a range of mesh sizes and physical models."

Key Findings

1. Tesla V100S has nearly 2x better performance on models (V19sp-X) using sparse solver due to its higher FP64 performance.
2. V100S performance is almost 2x better than RTX 6000/8000 in some cases (V19sp-X cases).
3. Besides GPU, high core count CPU is playing an essential role in Ansys application performance. In some cases, a sole high core count processor even outperforms a solution with CPU + GPU acceleration. e.g. 2x Gold 6252 24C vs 2x 6256 12C + V100S.

System Specifications

Exxact Ansys Certified Rack-mountable Workstation - CPU: 2x Intel Xeon Gold 6256 3.60 GHz 12-Core CPUs, HT Off. GPU: NVIDIA Quadro V100S*, NVIDIA Quadro RTX 6000 Mem: 512GB RAM. Cent OS 7.7.1908 64-bit.

*NVIDIA Tesla V100S is passively cooled and recommended only if used in a rack-mounted configuration for this type of workstation.

Ansys 2019 R2 Test Cases

• Power Supply Module (V19cg-1)
• Tractor Rear Axle (V19cg-2)
• Engine Block (V19cg-3)
• Gear Box (V19ln-1)
• Radial Impeller (V19ln-2)
• Peltier Cooling Block (V19sp-1)
• Semi-Submersible (V19sp-2)
• Speaker (V19sp-3)
• Turbine (V19sp-4)
• BGA (V19sp-5)

Notes

The benchmarks have been designed to run in about 48 hours on current generation hardware with at least 128 GB of RAM. If changes are made when running these benchmarks, for example, to run more variations of cores, if the benchmarks are run on older/slower hardware, or if hardware with less than 128GB of physical memory is used, then longer runtimes can be expected

Ansys Mechanical Run Time Benchmark: NVIDIA Tesla V100S vs Quadro RTX 6000 vs CPU Only

Cases	Tesla V100S	Quadro RTX 6000	CPU Only
V19cg-1	158	187	406
V19cg-2	181	224	323
V19cg-3	200	232	394
V19ln-1	158	202	298
V19ln-2	123	262	412
V19sp-1	92	177	274
V19sp-2	181	297	508
V19sp-3	117	205	309
V19sp-4	72	152	244
V19sp-5	98	205	322

Ansys Benchmarks - Mechanical Core Solver Rating: NVIDIA Tesla V100S vs Quadro RTX 6000 vs CPU Only

Tesla V100S	Quadro RTX 6000	CPU Only
V19cg-1	902.82	734.07	273.24
V19cg-2	751.30	568.05	360.90
V19cg-3	674.47	544.42	283.00
V19ln-1	734.07	529.74	343.27
V19ln-2	799.26	350.37	216.22
V19sp-1	1102.04	528.44	330.28
V19sp-2	541.35	313.16	176.98
V19sp-3	64.36	24.07	14.68
V19sp-4	58.78	22.45	13.07
V19sp-5	31.91	12.64	7.58

Power Supply Module (V19cg-1)

Analysis Type	Steady State Thermal
Number of Degrees of Freedom	5,300,000
Equation Solver	JCG
Matrix	Symmetric

Tractor Rear Axle (V19cg-2)

Analysis Type	Steady Linear Thermal
Number of Degrees of Freedom	12,300,000
Equation Solver	PCG
Matrix	Symmetric

Engine Block (V19cg-3)

Analysis Type	Static Linear Structural
Number of Degrees of Freedom	14,200,000
Equation Solver	PCG
Matrix	Symmetric

Gear Box (V19ln-1)

Analysis Type	Modal Structural
Number of Degrees of Freedom	7,700,000
Equation Solver	PCG
Matrix	Symmetric

Radial Impeller (V19ln-2)

Analysis Type	Modal - Cyclic Symmetry, Structural
Number of Degrees of Freedom	2,000,000
Equation Solver	Block Lanczos
Matrix	Symmetric

Analysis Type	Static Nonlinear Thermal-Electric Coupled Field
Number of Degrees of Freedom	650,000
Equation Solver	Sparse
Matrix	Non-symmetric (Unsymmetric)

Semi-Submersible (V19sp-2)

Analysis Type	Transient Nonlinear Structural
Number of Degrees of Freedom	4,700,000
Equation Solver	Sparse
Matrix	Non-symmetric (Unsymmetric)

Speaker (V19sp-3)

Analysis Type	Harmonic Linear Structural
Number of Degrees of Freedom	1,700,000
Equation Solver	Sparse
Matrix	Non-symmetric (Unsymmetric)

Turbine (V19sp-4)

Analysis Type	Static Nonlinear Structural
Number of Degrees of Freedom	3,200,000
Equation Solver	Sparse
Matrix	Symmetric

BGA (V19sp-5)

Analysis Type	Static Nonlinear Structural
Number of Degrees of Freedom	6,000,000
Equation Solver	Sparse
Matrix	Symmetric

You May Also Be Interested In

• Selecting The Right Workstation for Ansys Workloads