From i7 7700k to AMD Ryzen 9 5950x, same GPU - Huge improvements overall !

[5EVC Tiger]

This came to a surprise to me as I did not think DCS World was that CPU-bound.

Old build:

EVGA Z270 Stinger

Intel i7 7700K @ 5.1Ghz

G.Skill 3600 CL16 32G RAM

EVGA GeForce GTX 1080ti FE

HP Reverb G2

 

New build:

MSI x570 Gaming Carbon Pro

AMD Ryzen 9 5950x stock

G.Skill 3600 CL16 32G RAM

EVGA GeForce GTX 1080ti FE

HP Reverb G2

 

With my former build, when sit in the F-14 cockpit on the supercarrier in the Persian Gulf the CPU frametime would show between 30-40ms with the GPU showing pretty much the same, sometimes more. The GPU would be running at 85-95%.

 

With the 5950x, CPU frametime down to 15-20ms and now the GPU shows between 20-30ms... Same in game settings. My GPU now running 100%, the poor thing being force-fed with data !!! 

 

Therefore, if you're looking to upgrade your rig, I would have a close look at the CPU first... I realize now what a CPU bottleneck would look like. 

[Andrei]

Congrats! Yeah, for me it was also Huge improvement going from 7700K to 5800X. The funny thing is - I borrowed 3090 to test how would it fare against my 2070S. With same settings the FPS rose by a puny 10%. But when maxing out all graphics settings it has pretty much stayed that way. Which suggested that DCS was still... CPU bound, but on a different level  

[Thinder]

G-Skill 16GB (2x8GB) DDR4/3600MHz doesn't mean much with Ryzen 5000 series, it would be useful to know the number of ranks per stick and latency for a starter.

 

You need a kit of CL14 x 4 x 1 bank 3200 to take fully advantage of the bound Ryzen-RAM, latency, rank interleaving (1 bank x 4 sticks) and max recommanded (for the reasons quoted) of 3200MHz.

 

Those kits generally come with B-Die but this only allows for tighter frequency settings, it doesn't affect the speed unless your BIOS settings are bad, they are mainly used by players overclocking their CPUs who need better settings ranges and more stability from the RAM chips.

https://forums.eagle.ru/topic/269603-9600k-vs-ryzen-5600x/?do=findComment&comment=4681781

G.SKILL TridentZ RGB Series 32GB (4 x 8GB) 288-Pin DDR4 SDRAM DDR4 3200 (PC4 25600) Desktop Memory Model F4-3200C14Q-32GTZR For Ryzen.

 

Of course you can fit RAM with higher frequencies, but the CPU controller will throttle down under load, it is designed for the recommanded 3200MHz and a maximum of 4 ranks, if your RAM is 2 X 2 ranks you don't have a 100% efficiency, it could run faster, also Ryzen 5000 main asset is lower latency, not higher frequencies, so take advantage of it.

 

 

Edited June 8, 2021 by Thinder

[Taz1004]

6 hours ago, 5EVC Tiger said:

This came to a surprise to me as I did not think DCS World was that CPU-bound.

Old build:

EVGA Z270 Stinger

Intel i7 7700K @ 5.1Ghz

G.Skill 3600 CL16 32G RAM

EVGA GeForce GTX 1080ti FE

HP Reverb G2

 

New build:

MSI x570 Gaming Carbon Pro

AMD Ryzen 9 5950x stock

G.Skill 3600 CL16 32G RAM

EVGA GeForce GTX 1080ti FE

HP Reverb G2

 

With my former build, when sit in the F-14 cockpit on the supercarrier in the Persian Gulf the CPU frametime would show between 30-40ms with the GPU showing pretty much the same, sometimes more. The GPU would be running at 85-95%.

 

With the 5950x, CPU frametime down to 15-20ms and now the GPU shows between 20-30ms... Same in game settings. My GPU now running 100%, the poor thing being force-fed with data !!! 

 

Therefore, if you're looking to upgrade your rig, I would have a close look at the CPU first... I realize now what a CPU bottleneck would look like. 

 

My upgrade should've been bigger jump as I went from i7-4770K to 5600X.  With GTX-1080.  There was improvement like loading time and less stutter in mission with a lot of ground units.  But I wouldn't say it was huge.  Frametime for the most part remained same which is what I expected.

[Thinder]

9 hours ago, Andrei said:

Congrats! Yeah, for me it was also Huge improvement going from 7700K to 5800X. The funny thing is - I borrowed 3090 to test how would it fare against my 2070S. With same settings the FPS rose by a puny 10%. But when maxing out all graphics settings it has pretty much stayed that way. Which suggested that DCS was still... CPU bound, but on a different level  

 

DCS has always been CPU bound, but what players forget is that the CPU controller also sets up the GPU and RAM buses, this means that without an optimized RAM-to-CPU bound your GPU will also work below its optimum capabilities. although it is only about a couple of % max in the case of the GPU.

 

From my PoV, the very first thing to do is to free the CPU controller from all RAM limitations and there is only one way to achieve it, CL 14, 4 banks, 4 sticks and 3200MHz, as early as you depart from this, the controller will suffer a performance hit one way or another, it matters little if you O.C the CPU, the RAM or the GPU, the bottleneck will still be present, that's what we got with Ryzen 5000.

 

When you think that the last generation of AMD GPU have an average of 5% O.C headroom but that you can achieve a CPU gain of above 6% simply by fitting one of those RAM kits, you can better apreciate how important it is to take advantage of the Ryzen 5000 architecture and its optimisation for low latency.

 

Once that done, players can still O.C their components but they will beneficiate a lot more from bouding the CPU to an optimized RAM kit first.

 

For info, here is the reply from AMD to my quiery about ranks and frequencies.

In their email, they do not mention rank interleaving which is achieved with 4 X 1 rank modules.

 

The controller of a Ryzen 7, they all are similar...

 

Ryzen latency...

Edited June 9, 2021 by Thinder