What is the current best processor for P3D v4 without budget consideration?

[GSalden 4,692]

Mmmm...

4x 8Gb GSkill Ripjaws F4 3200 cl16 ?

instead of the 16 Gb GSkill Trident 3600 mhz

 

[SteveW 1,792]

The four are slightly cooler individually and perform at the same speed overall or very close.

[SteveW 1,792]

...the other thing about getting four is that if the motherboard requires a minimum of two slots filled, and one fails you still have a system going.

[GSalden 4,692]

Thanks Steve.

As I did understand from Rob A above 8 real cores P3Dv4.2 does not use effectively. 

However , Rob has a 1 monitor setup and I have a triple view setup . So more scenery is shown.

I intend to use 1 core for the main Prosim 737 module , 1 for the Prosim MCP module and 2 for several smaller addons. All started by batchfiles with affinity .

So 10 for P3D. If that seems too much I could disable the 2 cores that are the most close to the main thread core. And I surely can put Windows on core 0 and P3D beginning on core 1.

However , my experience with V4.2 is that my current Sim is smoother without an AM ...

 

 

Edited March 7, 2018 by GSalden

[SteveW 1,792]

No need to restrict Prosim or anything else to one core. Network apps work better with two cores anyway as they can be in more wait situations on one.So long as your apps are off the main P3D cores is what's needed. Indeed P3D or FSX spread over too many cores makers no sense as I always said the AM will be a requirement with many cores.

[SteveW 1,792]

3 hours ago, GSalden said:

...So 10 for P3D...my current Sim is smoother without an AM ...

 

With your 6 cores maybe, but using 10 may eat into available memory bandwidth and other CPU resources unnecessarily. For instance, it was hard to beat FSX on four cores, I actually see slightly less performance on 5 straight non-HT cores with FSX and then a small climb in performance with 6, none after that. Not because the sim doesn't need it or can't use it, rather the PC can't supply it. P3D is similar but shows better use of those 6 than FSX and P3D v3.

[GSalden 4,692]

1 hour ago, SteveW said:

With your 6 cores maybe, but using 10 may eat into available memory bandwidth and other CPU resources unnecessarily. For instance, it was hard to beat FSX on four cores, I actually see slightly less performance on 5 straight non-HT cores with FSX and then a small climb in performance with 6, none after that. Not because the sim doesn't need it or can't use it, rather the PC can't supply it. P3D is similar but shows better use of those 6 than FSX and P3D v3.

Rob has written that P3Dv4 has maximum used 13-14 Gb of memory and therefore 16 Gb would be enough.

Do you think that with 14 cores 32 Gb would be better ?  I do not want to spent on 32 Gb while 18-20 Gb is not being used and might slow down performance.

[westman 257]

I run 10 cores for P3D-V4.2 have 8 free for all other apps its more raw power then a 8600K.

mem i run 3733 C16 4X8 32gb quad channel no problem with bandwith.

one thing you need a really good PSU with 2 GPU.s minimum 1200W if you intend to OC the CPU and have a little headrom.

with a CustomLoop and run the cpu at 4.95ghz HT ON and 2X1080TI at boost 2150mhz i get 2050W from the wall during bench TimeSpy

 

[SteveW 1,792]

9 minutes ago, GSalden said:

 ...while 18-20 Gb is not being used and might slow down performance.

Wouldn't slow it down but agreed, it's not going to be used much. 

[GSalden 4,692]

4 minutes ago, westman said:

I run 10 cores for P3D-V4.2 have 8 free for all other apps its more raw power then a 8600K.

mem i run 3733 C16 4X8 32gb quad channel no problem with bandwith.

one thing you need a really good PSU with 2 GPU.s minimum 1200W if you intend to OC the CPU and have a little headrom.

with a CustomLoop and run the cpu at 4.95ghz HT ON and 2X1080TI at boost 2150mhz i get 2050W from the wall during bench TimeSpy

 

Thanks Hasse.

So I can leave core 0 to Windows and 1-8 for P3Dv4.2 and core 9-13 for the addons. Or do you advise core 0-7 for P3Dv4.2, cores 8-13 for the addons and let Windows do what it wants ?

As I only have 1 1080Ti  I will see if my 1000 W PS is enough....

[SteveW 1,792]

PSU is a key component

...I err on the side of caution, so I have four memory modules since as I said i can reduce the system to two in the event of one failing. Also I don't like to power up the PC in the morning to stare at a failed boot message so I have RAID failover and can keep working wile waiting for a parts delivery.

[westman 257]

49 minutes ago, GSalden said:

Thanks Hasse.

So I can leave core 0 to Windows and 1-8 for P3Dv4.2 and core 9-13 for the addons. Or do you advise core 0-7 for P3Dv4.2, cores 8-13 for the addons and let Windows do what it wants ?

As I only have 1 1080Ti  I will see if my 1000 W PS is enough....

on the 7920x the nr3 core was best and had that for P3D main and the rest of cores at 4.9ghz with less vcore

the 7980XE do 5ghz on all cores  there i leave core 0 to win and 1-10 for p3d  the rest for other work.

now you can test wich cores that clock best and adjust the vcore and clock for each core , lot of work.

asume that core5 is your best, 5 to 13 for p3d you can easy have the best core at +4.8-5.0ghz (for P3D main tread)  with higher vcore 1.25-1.27 then the rest at 4.6-4.7 1.12-1.17v with less heat and powerdraw

 

Edited March 7, 2018 by westman

[Bert Pieke 7,586]

13 hours ago, GSalden said:

Thanks Hasse.

So I can leave core 0 to Windows and 1-8 for P3Dv4.2 and core 9-13 for the addons. Or do you advise core 0-7 for P3Dv4.2, cores 8-13 for the addons and let Windows do what it wants ?

As I only have 1 1080Ti  I will see if my 1000 W PS is enough....

Why not dedicate the first physical core (0,1) to Windows and 2-8 for P3D?

P3D will put most of the load on the first core you give it.. and that should not be a core you are sharing with the OS, if you have this much to work with..

[BlueStar 323]

My grandson tells me that P3dv4 will run on a Cray without any problems. 

[GSalden 4,692]

4 hours ago, Bert Pieke said:

Why not dedicate the first physical core (0,1) to Windows and 2-8 for P3D?

P3D will put most of the load on the first core you give it.. and that should not be a core you are sharing with the OS, if you have this much to work with..

Bert, this is a real 14 core processor ( HT off ).

With my current 6 core 5820 I let Windows and P3D do what they want without an AM. My addons are spread over the less used cores . Each addons can use 2 cores. This is smoother than 1 Windows core and use an AM for P3D.

With a real 14 core processor I probably will need an AM , but without HT on , as 28 LP’s might confuse the system...

Edited March 8, 2018 by GSalden