4690K useless for simulations

[_namenick_]

Hi,

I have a 4690K with beQuiet D.R. 3 and an XPS15 with a 9750

I'm running a lot of Abaqus and other FEA simulations for university lately and even tho I obv expected the i7 to be quite a lot better at it then the i5, the difference is MASSIVE. I though thermal limitations on the laptop and the overclock capabilities of the i5 would have compensated just a little but looks like no, the i5 looks like it doesen't almost want to run them, even "light" ones.

 

Now I ask you, can I do something to make i5 at least useful? I don't really like the i7 having to run 100% at 100°C for 10 hours or more, I hoped I could make the other one do the hard work, even spending twice the time maybe...

 

Does buying an used i7 4790 K or not, make any sense, can it get as good as the i7?

Thanks for any suggestion you will give me, have a nice day

[Princess Luna]

Looking through seems this application likes # of threads above all things therefore a Ryzen 7 2700X which is a fairly cheap CPU would outperform an i7 4970 by quite a massive margin.

 

Given this is for college, might be work thinking on the investment.

[Fasauceome]

5 minutes ago, _namenick_ said:

Does buying an used i7 4790 K or not, make any sense, can it get as good as the i7?

The 9750H is a pretty huge leap ahead of even the 4790K. 2 extra cores and  much newer architecture, it would be a little hard to justify haswell, especially with somewhat high used prices.

[svmlegacy]

47 minutes ago, _namenick_ said:

Hi,

I have a 4690K with beQuiet D.R. 3 and an XPS15 with a 9750

I'm running a lot of Abaqus and other FEA simulations for university lately and even tho I obv expected the i7 to be quite a lot better at it then the i5, the difference is MASSIVE. I though thermal limitations on the laptop and the overclock capabilities of the i5 would have compensated just a little but looks like no, the i5 looks like it doesen't almost want to run them, even "light" ones.

 

Now I ask you, can I do something to make i5 at least useful? I don't really like the i7 having to run 100% at 100°C for 10 hours or more, I hoped I could make the other one do the hard work, even spending twice the time maybe...

 

Does buying an used i7 4790 K or not, make any sense, can it get as good as the i7?

Thanks for any suggestion you will give me, have a nice day

If the i5 isn't adequate or FEA simulations, then your mesh size is likely too small, or the program is unaware that it's a 4 threaded processor. The requirements is quite exponential as mesh size decreases. The 4790K will only give ~ 60% at very best more performance than the 4690K.

[_namenick_]

15 hours ago, Princess Luna said:

might be work thinking on the investment.

Well the investment has already been the laptop, quite a big one honestly. Ryzen is very cool for the purpose I think, but it will cost a lot since I would have to buy new CPU, MoBo and Ram. Just in case, can you suggest me a good budget combination of those three?

 

15 hours ago, Fasauceome said:

it would be a little hard to justify haswell, especially with somewhat high used prices.

So I consider keeping my CPU and simulating on the laptop or completely changing architecture and also switching to AMD, correct?

14 hours ago, svmlegacy said:

then your mesh size is likely too small, or the program is unaware that it's a 4 threaded processor

Well, I set the simulation to run on 4 core/threads and mesh size is just what it needs to be, I mean you can go bigger but it will result in not reliable results. It's a simulation that includes two bodies and contact, so it's quite heavy by itself

 

 

Extra question, what benchmark should I rely on to value different CPUs for this purpose?

 

Thanks again

[toasty99]

Just use the laptop. 

 

It's very easy to fix the thermal issues. Just buy some quality thermal paste, take the laptop apart and repaste the CPU. Can probably get that down to 85-90 degrees. 

 

Another solution would be to downclock the 9750h just a little bit. 90 percent of the clockspeed with 2 more cores is still gonna smoke a 4770k let alone a 4570k. 

[_namenick_]

8 hours ago, toasty99 said:

Just use the laptop. 

 

It's very easy to fix the thermal issues. Just buy some quality thermal paste, take the laptop apart and repaste the CPU. Can probably get that down to 85-90 degrees. 

 

Another solution would be to downclock the 9750h just a little bit. 90 percent of the clockspeed with 2 more cores is still gonna smoke a 4770k let alone a 4570k. 

Well thank for the advice but I'm sorry I have to disagree on the "easy" definition. I mean I'd have to tear it apart and invalidating warranty, that's quite a risk to take.

I downloaded throttlestop and now I'm trying to figure out from a guide or something like that how to optimize performance staying at lower temps, I really don't like it being and 100°C for 16 hours

[toasty99]

1 hour ago, _namenick_ said:

Well thank for the advice but I'm sorry I have to disagree on the "easy" definition. I mean I'd have to tear it apart and invalidating warranty, that's quite a risk to take.

I downloaded throttlestop and now I'm trying to figure out from a guide or something like that how to optimize performance staying at lower temps, I really don't like it being and 100°C for 16 hours

 

Well if you are worried about the warranty just run the CPU at 100°C  until it breaks and/or right before the warranty expires get it replaced by telling them it is overheating.

 

I wasn't really thinking about a warranty. 

[_namenick_]

23 minutes ago, toasty99 said:

 

Well if you are worried about the warranty just run the CPU at 100°C  until it breaks and/or right before the warranty expires get it replaced by telling them it is overheating.

 

I wasn't really thinking about a warranty. 

Well it's what I'm going to do probably, other than underclocking the right bit with ThrottleStop

Just curios, why weren't you worring about it? I mean it's a pretty common thing to worry about, isn't it?

Thanks again btw

[toasty99]

37 minutes ago, _namenick_ said:

Well it's what I'm going to do probably, other than underclocking the right bit with ThrottleStop

Just curios, why weren't you worring about it? I mean it's a pretty common thing to worry about, isn't it?

Thanks again btw

I buy mostly used parts and used laptops so it doesn't normally affect me. 

 

Knock on wood but I've never had a part fail that was not already failing when I bought it (cheap deal on a GPU I thought was a driver issue, was not). Well, I did blow up a motherboard but that was my fault for putting a voltage in that was absolutely nuts.