Fastest single thread speed.

[Lightning_fingers]

I’m after some advice. Could somebody please suggest the fastest currently available single thread speed cpu.

The cpu needs to have at least 8 cores to run 8x single thread EDA CAD simulations.

overclocking is not an option.

 

i’m thinking 9900ks (best IPC and max clock speed combination?) with the fully sustainable 5Ghz on all 8 cores, paired with the fastest memory that cpu supports. (Configured in dual channel).

 

Am I missing something here? Is anything from AMD in the same ballpark?

[Electronics Wizardy]

9900ks is probably your best bet, but some programs like amd more, and some would work better on something like a 9990x with the more cache and better avx.

[LIGISTX]

5 minutes ago, Lightning_fingers said:

I’m after some advice. Could somebody please suggest the fastest currently available single thread speed cpu.

The cpu needs to have at least 8 cores to run 8x single thread EDA CAD simulations.

overclocking is not an option.

 

i’m thinking 9900ks (best IPC and max clock speed combination?) with the fully sustainable 5Ghz on all 8 cores, paired with the fastest memory that cpu supports. (Configured in dual channel).

 

Am I missing something here? Is anything from AMD in the same ballpark?

That is the fastest single core chip, yes. For what your specifically asking, that is the correct chip.

 

But why is that the requirement, and why is overclocking not an option? Also, if you are doing CAD sims on each, does RAM bandwidth matter? If so, I’d be very curious if a chip with quad channel RAM would actually net better results. We have no info an ram bandwidth needs in this assumption. 

[Fasauceome]

The 9900KS actually has worse IPC than the 9900K because of mitigations to Intel vulnerabilities. If you want the fastest chip, it's the 9900K with some serious cooling. You can buy pre binned 9900K CPUs as well.

[Lightning_fingers]

4 minutes ago, LIGISTX said:

That is the fastest single core chip, yes. For what your specifically asking, that is the correct chip.

 

But why is that the requirement, and why is overclocking not an option? Also, if you are doing CAD sims on each, does RAM bandwidth matter? If so, I’d be very curious if a chip with quad channel RAM would actually net better results. We have no info an ram bandwidth needs in this assumption. 

The requirement is to run 8 concurrent single threaded jobs as quickly as possible.

The EDA CAD Linux based software is not IO bound, but you are right, it’s a tough call if the memory bandwidth compared to a quad channel configuration would have an impact on simulation time.

The assumption is that the 8 concurrent jobs are CPU thread bound.

 

ultimately a hardware evaluation may be required.

 

so dual channel memory 9900ks from intel        (Or a quad channel device) Vs which quad channel device from AMD?

note, cost is also a consideration, ultra expensive xeons are not on the table.

[Lightning_fingers]

2 minutes ago, Fasauceome said:

The 9900KS actually has worse IPC than the 9900K because of mitigations to Intel vulnerabilities. If you want the fastest chip, it's the 9900K with some serious cooling. You can buy pre binned 9900K CPUs as well.

I’ve read the 9900k can’t sustain 5Ghz across all cores, only 2 cores concurrently.

[LIGISTX]

1 minute ago, Lightning_fingers said:

The requirement is to run 8 concurrent single threaded jobs as quickly as possible.

The EDA CAD Linux based software is not IO bound, but you are right, it’s a tough call if the memory bandwidth compared to a quad channel configuration would have an impact on simulation time.

The assumption is that the 8 concurrent jobs are CPU thread bound.

 

ultimately a hardware evaluation may be required.

 

so dual channel memory 9900ks from intel        (Or a quad channel device) Vs which quad channel device from AMD?

note, cost is also a consideration, ultra expensive xeons are not on the table.

The only quad channel chip in your price range will be thread ripper. But those won’t have the same clock speed at all. But, the RAM bandwidth and cache may help and overcome the lack of sheer ghz. Hard to know for sure tho, I’m just totally guessing at the softwares needs. 

[LIGISTX]

2 minutes ago, Lightning_fingers said:

I’ve read the 9900k can’t sustain 5Ghz across all cores, only 2 cores concurrently.

9900ks can. 

[LIGISTX]

Also, why is overclocking not an option? To be fair, won’t get much more out of a 9900ks anyways, 5.2ghz best case realistically. And AMD OC’s pretty crappy across the board.

If you are just using 8 threads, you could turn hyper threading off which can help with overclocking potential.

[Lightning_fingers]

Just now, LIGISTX said:

The only quad channel chip in your price range will be thread ripper. But those won’t have the same clock speed at all. But, the RAM bandwidth and cache may help and overcome the lack of sheer ghz. Hard to know for sure tho, I’m just totally guessing at the softwares needs. 

The software does not require 64 bit executables (it’s available in both 32 and 64 bit executable variants). And the memory footprint of each single thread simulation is <4gig therefore the 32 bit executables can be used.

on current hardware, no simulation speed improvement is seen between 32 and 64 bit executables.

 

The dual channel vs quad channel memory configurations, married with differences in IPC and max click speed between Intel and AMD make the decision     tricky.

hence my asking.

 

 

[Lightning_fingers]

5 minutes ago, LIGISTX said:

9900ks can. 

I know it can. That’s why I suggested it in my original post rather than the 9900k

[LIGISTX]

2 minutes ago, Lightning_fingers said:

The software does not require 64 bit executables (it’s available in both 32 and 64 bit executable variants). And the memory footprint of each single thread simulation is <4gig therefore the 32 bit executables can be used.

on current hardware, no simulation speed improvement is seen between 32 and 64 bit executables.

 

The dual channel vs quad channel memory configurations, married with differences in IPC and max click speed between Intel and AMD make the decision     tricky.

hence my asking.

 

 

Yea... hard to say. AMD has faster IPC, but intel has more Ghz. This is why gaming is typically better on intel, but just slightly. The 9900ks is the number 1 gaming chip because of this, but I doubt this is at all apples to apples to your application. Plenty of single threaded things do see gains on AMD because of IPC and such, but that also is not always the case at all. It’s a very hard question your posing, and I’m worried there is only one way to definitively find out... 

[LIGISTX]

10980xe is quad channel as well. But I don’t know what speeds it would result in with 8 cores pegged. Google will know tho.