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I've just updated a PC to do scientific calculations more quickly. The focus of the change was to step up to the Nvidia 1080Ti from the 980Ti.
Now I'm running a test model. I get the following results:
Stage 1080Ti PC 980Ti PC
Set up 00:00:12 00:00:14
Create grid 00:22:25 00:15:50
GPU calc 00:02:24 00:03:25
Export results 00:00:22 00:00:26
So you can see above that everything is faster except for the grid creation. The GPU stage is 30% quicker with the 1080Ti than the 980Ti which is great and the exports are 15% quicker. But the grid creation is 40% slower.
I think the grid step is mostly CPU and HDD reliant. So I did CPU and HDD benchmark suites on Phoronix Test Suite. It found that the i7-7700k CPU is better than the i7-4790 across all 14 benchmarks I ran. But when I ran the HDD benchmarks the Samsung 960 EVO NVMe SSD was mostly better than the Samsung 850 SSD except for a few tests, in particular the dBench 1 Client mark was 40% worse and the the SQLite Insertions mark was 80% worse. HDD Benchmark Comparison So I'm assuming the issue is with the HDD.
So my questions are:
- Do you think the Samsung 960 EVO HDD has resulted in that 40% performance reduction compared to the Samsung 850 SSD?
- Do you have any suggestions on how to fix it?
We can't tell without knowing anything about grid creation. – styrofoam fly – 2017-06-20T09:24:43.627
"I upgraded my graphics card and it's slower" ... "oh I also upgraded every other system component so could that be part of the problem?". Without providing specs the answer would be to change to your old system and replace components one by one. Testing every change. Look at what create grid does to figure out your bottleneck. – Seth – 2017-06-20T09:34:08.657
I've provided specs in the first picture and in the question. And I've given you my best guess on grid creation which is that it is CPU and HDD heavy. Based on the tests I've done and described it seems to suggest it is not the GPU or the CPU. Hence why the focus of the question is on the HDD and why I've put in a picture showing the HDD benchmarks. Is it possible for a new M2 960 EVO do have such a significant performance drop compared to an 850 SSD? – dalvene – 2017-06-21T00:04:57.460
The new HDD is a 960 EVO NVMe SSD in case that's not clear. For some reason PTS doesn't put that in its spec. – dalvene – 2017-06-21T01:42:18.367