Mathieas

Hi all, I realized I also forgot the 2XMSAA. I do however have the new steam VR beta. Test 26 (Beta 1.17.7): GPU Frametime: 10.40 CPU Frame Time: 6.11

@ShaunX Nice work!!! That is a very respectable cou frame time! Are you alt tabing as well once dcs starts?

@ShaunX I know the feeling! I have been a 100% intel guy until this upgrade and all these new details were quite overwhelming. Overclocking was allot more simple with my 6900k. Do you have a sense for what your 5900x is boosting to on a single core? I use HWINFO64 to monitor while running cinebench R23. I imagine your 5900x is boosting as good or better then my chip stock. Here is the ram i bought just incase it help you any. It is quite expensive but so far I have been very happy with it. https://www.newegg.com/g-skill-32gb-288-pin-ddr4-sdram/p/N82E16820374093?Item=N82E16820374093

@ShaunX Sadly I have not tested performance with slower memory. I have read though that ram speed is really important for these CPUs. Running at 3200 would lower your Fclk to 1600 vs my 1800 which could be a big part of this esp with the 5900 having two chiplets(they communicate through the infinity fabric-fclk) while my chip only had one. Also, 2cl difference in speed at 3200 vs 3600 is much larger then it looks and is probably playing as big or bigger role then the fclk. For example, 14/3600 is 3.88ns while 16/3200 is 5ns. That is a 30% higher ram latency at the cl level. I have also read that the 5800x is so expensive for the core count because it require one perfect chiplets vs the 5600x or 5900x using 2 lesser chiplets(6cores/per vs 8cores/per). It is still less then a 5900x but only a $100 which would normally be strange for 2/3 the core count. I do use PBO on auto. I have it set to auto(I tried manually increase this, but like many others onlinr it was not helpful) and I tend to boost single core up to 4,850mhz on 1-2 cores at a time during cinebench. I did not check my boost clock during this test as those monitoring programs all cost performance. Please let me know if you have any other questions, I will do my best to respond. A note on ram: You may know this already but flcl really needs to match the ram freq/2. Though to be precise our ram isn't running at 3200 or 3600mhz. It is really running at 1600 and 1800mhz but completes two instructions per clock giving us 3200/3600million instructions per second instead of cycles (as the manufacturer would like us to think). Lastly, if you do upgrade ram, you want to make sure you are getting dual rank samsung b-die for the highest performance (2 stick 32gb/cl14 is almost if not always b-die, there are tools online to double check). Dual rank on 2 Dimms really seems to benefit AMD chips. You could get 4 single rank dimms but I find (due to physical limitations of the board and not knowing what memory topography your board uses) this generally results in looser required timings then 2 dual rank chips.

@speed-of-heat Totally understood! From my perspective, I would say you have met your goal 100%. Thank you again! It was not until I saw your performance increase from the mods that I even considered trying them (generally try to keep my games stock).

@speed-of-heat Thank you very much for the detailed reply and your test file. Finally a benchmark to use to see how things are changing but with the added benefit to have a comparison with others. I have ran this using your final recommended test 26 settings but with Clear Water IC PASS. Alt-Enter used GPU Frame Time: 9.22ms CPU Frame Time: 6.11ms No Alt-Enter used GPU Frame Time: 9.64ms CPU Frame Time: 6.32ms This is my PC spec just incase anyone is interested: CPU: AMD Ryzen 5 5800x - Fclk@1800mhz Mother Board: Asus Crosshair VIII Formula GPU: 1x 3090 FTW3 Ultra Hybrid @undervolt 0.987v +165mhz offset (~2070mhz - 2040mhz) RAM: 2x 16GB G.Skill Trident Z Neo @3600mhz CL14 (B-Die) SSDs(NVME): 1X Samsung 970 EVO Plus 2TB, DCS and PAGE file here Sound: Creative Sound Blaster ZXR PSU: EVGA SuperNOVA 1000W T2 Monitor(Main): Acer Predator XB271HU (144hz IPS) OS: Windows 10 pro 64bit

Hi there Speed of Heat, First, I would like to thank you for your amazing and thorough job testing settings and their impact on performance! I had a couple questions regarding your 2.7 update and the mods. I have adopted your mods as you suggested but was wondering if your final shadow setting in DCS is still set to low? You mention "medium" in one of your description for the mods but I did not see a change to a medium setting in any of your test descriptions. Are you using medium or low in DCS now with the 3 mods(VR Shaders Mod/Flat Shadow removal/Shadows Reduced Frame Rate Impact)? I was also wondering if you might be willing to share your test flight file? I would like to see how close my performance mimics yours. I have a 5800x with a 3090 FTW3 Hybrid. I was also hoping to understand a bit about how you test. I am very new to VR and so do not know the ins and out of what folks are doing. Do you leave the HMD off your head but running and just use the desktop? I personally have been putting FPSVR on my left monitor, alt-tab my right monitor that is now displaying a distorted left eye from my HMD and leave my HMD on the stand. Thank you sir!

Thank you all for the responses. Taz, Those processes sound more like GPU tasks then CPU ones. Is it reasonable to assume these would impart further GPU limits but CPU limits would be similar? or does it really impact both about the same? Mathieas

Hi all, I had a quick question. Does VR take more computing resources at a given resolution then a standard flat monitor with all other setting equal? For example lets say you had a VR headset that used a single LCD screen @4k (2k allocated for each eye) and compared that performance to a 4k flat monitor. Is it reasonable to expect the performance to match? How about if you start to lower the resolution of both displays and get into a more a CPU limited scenario? Do we see VR taking more CPU resources? Cheers, Mathieas

@Florist Thank you very much for the reply. Do you happen to have a link to that post?

Hi all, I currently have a Intel 6900k OCed to 4.2Ghz(2646 in passmark single core performance) with a Titan Xp (basically a 1080ti with more Vram). I have a HP Reverb G2 on order but do not have a VR headset to test performance currently. What i am trying to work out is, is it possible to setup a test that would mimic VR performance in my current setup? Is is simply make the pixel count as close as I can and go from there or does VR have additional overhead? I am also thinking of getting a 3090 to power the G2 (as at native res it will push just over the pixels pushed on a 4k display). I have seen and read many posts about the CPU limitation of DCS and have read that I can expect both little gain and tremendous gain in performance at over 4k with the 3090. What I am having trouble understanding is where do those cases present themselves? Is there a recommend mission I could load with gfx settings to minimum (so I am CPU limited) to get a sense what the worst case FPS will be with the 3090? How about a mission to determine the average expected FPS? How about a mission to determine the average expected FPS? I am very new to DCS and really only intend to play campaigns both single player and multiplayer (with just 1 or 2 others). Cheers, Mathieas

So it makes sense to me that each eye on a VR head set needs to be treated as a separate image as each has a different perspective. What i do not understand is why a mirrored display would use more resources... isn't it the same signal just being routed to two places instead of one? If the mirrored screen was a different resolution then I could see this taking more resources for the up or down scaling... but otherwise I am hard press to see where more Vram or processing time would be needed. Full disclosure I am not an expert by any means and I am always looking to learn. Mathieas

Hi there Glide, I do not mean any disrespect with this contradiction but, yes, I(and many others) can tell a difference between 30 and 60hz(FPS). I (and many others) can even see a stark difference between 60 and 120 fps. This is why 120-144hz refresh rate monitors are so valuable. Side note: If you only have a 60hz display you will never see a difference between 60 and any FPS higher then 60 (aside from some added stability in frames). Your display must refresh at the higher rate to see the difference. Out of curiosity have you ever moved a mouse on a 60hz desktop and compared it to a 144hz desktop? It is like going from a sand paper surface to a silk surface (OK i exaggerate a bit but not much :-P. I have seen quite a few blind experiments done to support these statements but would need to a search to find them if you are interested. It would be far more convincing for you to simply try and see for your self... it is very noticeable. Cheers, Mathieas

I would like to chime in here. While it is true you have 80% more pixels and thus 80% more overhead in performance needed to attain the same FPS you only get 20% more sub pixels. Each pixel on the Vive Pro/Oddessy has only 2 sub pixels instead of 3 like on the Rift- this is called a pentile display(2.3 million pixels per eye vs 1.3 million, but only 4.6million sub pixels vs 3.8million). This is like the first old OLED cell phone screens. I have used them and you can tell. Pentile displays looks much worse then RGB displays of the same resolution. This personally bothered me enough i returned the headset straight away. As always YMMV.

Wonderful ty! Please forgive my ignorance. I know some but not a lot about this. I really appreciate all of your time and expertise. What do you think of these pots? https://www.amazon.com/Potentiometers-50K-Ohm-15A-Taper/dp/B00M2904IU/ref=sr_1_9?ie=UTF8&qid=1544057789&sr=8-9&keywords=alps+potentiometer+50k https://www.amazon.com/Uxcell-a14101100ux0248-Terminal-Single-Potentiometer/dp/B016UFFZEY/ref=sr_1_8?ie=UTF8&qid=1544058478&sr=8-8&keywords=50k+potentiometer https://www.amazon.com/dp/B07DS88933/ref=sspa_dk_detail_3?psc=1&pd_rd_i=B07DS88933&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=f0dedbe2-13c8-4136-a746-4398ed93cf0f&pd_rd_wg=8Bzi7&pf_rd_r=TN4HXYCZ1X11254PW29V&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&pd_rd_w=jIecO&pf_rd_i=desktop-dp-sims&pd_rd_r=ceeac84b-f8f1-11e8-9f5d-7d3a3dd11bb9 Also i see they have a single nut on the shaft to mount.... would you have any expertise in how to get these cleanly mounted in the handle? I was figuring i would use my Dremal rotary tool and cut openings and sand down... but wasn't sure how to secure the pot other then bolt it to the reassembled handle.