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April 14, 2018, 09:41 |
7700K vs 7940X or 1950X
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#1 |
New Member
ismail
Join Date: May 2017
Posts: 3
Rep Power: 9 |
Hello friends,
I work on 3D design. I use; SolidWorks, CATIA, NX, ProEngineer... and I use analysis programs; ANSYS I'm going to buy a new system. My alternatives are; 1) 7700K Asus Z270 motherboard 64 GB DDR4 3200 MHz RAM GTX 1080 SLI 2) Intel i9-7940x or Threadripper 1950x Asus x299 Asus X399 DDR4 3000MHz RAM GTX 1080 If we think about the price, which one should I choose? Thank you. |
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April 14, 2018, 10:05 |
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#2 |
Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,406
Rep Power: 47 |
First things first: don't buy an I7-7700k.
It has been replaced quite a while ago with the I7-8700k. 50% more cores, same price. Needs a Z370 motherboard. With the software selection you mentioned, AMD Threadripper is not the best option due to its lower single-core performance. Most of these programs only use very few cores most of the time. Compared to the I9-7940x, an I7-7820x is the much more reasonable option. Unless all you do in CAD is CPU rendering, 14 or more cores won't help. Long story short: I7-8700k is faster for most things you do in CAD, I7-7820x is faster for simulations. You have to decide which is more important to you Which brings us to GPUs. Why 1080 SLI? Most software you mentioned does not support SLI. Is this for gaming? If you want multiple Graphics cards for rendering tasks, SLI is not needed. If you just want more performance than with a single GTX 1080 for anything else than rendering, I would recommend a 1080TI instead. Rendering aside, I would rather recommend a mid-tier Quadro card for all the CAD you do. Quadro P2000 or P4000 for example. By the way, consumer graphics card prices are free-falling right now because they are becoming useless for mining. The longer you wait, the cheaper they get. If you want to know more, I recommend this site: https://www.pugetsystems.com/all_news.php They have tons of tests for most of the software you mentioned with a wide variety of different hardware |
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April 15, 2018, 17:20 |
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#3 | |
New Member
ismail
Join Date: May 2017
Posts: 3
Rep Power: 9 |
Quote:
First, Thank you for your comment. I play games sometimes but for computer first purpose business, second games. I do not have Quadro graphics cards in my country. If I can find it, it is very very expensive. Earlier, We could show the GTX780m as Quadro K5000m through some software. Now, is there any software that can show the GTX 1080 like the Quadro P6000-5000-4000? Can we use it in ANSYS SLI mod(more CUDA)? Does ANSYS support SLI mode? more importantly, Does ANSYS support the GTX series? |
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April 16, 2018, 04:12 |
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#4 | ||||
Super Moderator
Alex
Join Date: Jun 2012
Location: Germany
Posts: 3,406
Rep Power: 47 |
Quadro cards are expensive everywhere. Prices in my country for P2000 and P4000 are 400€ and 800€ respectively.
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The pedants answer is no: Ansys recommends Quadro and Tesla cards for both graphics output and compute. However, using a GTX as a normal graphics card with Ansys is usually no problem. For compute, things get trickier. Ansys mechanical for example has a few select Quadro and Tesla cards white-listed. It refuses to use any other cards for compute. Ansys Fluent on the other hand can use any Nvidia graphics card as an accelerator. GPU acceleration in Ansys Fluent Caveats: not all tasks can be accelerated with a GPU, not all fast GPUs are necessarily good compute cards since most GPUs have crippled double precision performance, VRAM on most graphics cards is scarce, GTX support for Fluent might get removed any time. Make up your mind about what you really need. Spending a large portion of the budget for a simulation workstation on a compute GPU is usually not the best approach. Unless you are absolutely certain that your workload benefits from GPU acceleration and you have enough VRAM for your models. |
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April 17, 2018, 15:40 |
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#5 |
New Member
ismail
Join Date: May 2017
Posts: 3
Rep Power: 9 |
I have already read this topic that you have created. A really useful topic.
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