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Old 01-14-2020, 11:37 AM   #1
Andrew u.k.
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Default CPU upgrade, is it worth it?

Hi

Would I see a noticeable VR performance by changing CPU. I'm using the Rift with the wire.

Currently using an Intel® Core™ i7 Quad Core Processor i7-4790k (4.0GHz), 32 gb Ram, GTX 1070 Ti

I'd upgrade CPU, ram and mother board, but keep SSDrives and graphics card.

But would upgrading the processor and Ram make a large difference?



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Old 01-14-2020, 12:37 PM   #2
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I would say yes at that stock clock speed. Somewhere around 15% at a guess. Need to test it tho.
I would overclock water cool / AIO that chip, then at a guess it would be negligible, perhaps 5% with that GPU. I would do a few test and learn a bit about overclocking.
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Old 01-14-2020, 02:06 PM   #3
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Yes, I just upgraded from a I7-7700 @4mhz and saw about a 15% improvement. Don't expect the world though. I get a solid 45fps if not around cities or AI units. if low in Dubai or Las Vegas or around AI units FPS drops into the mid to upper 30's and there is some stuttering when looking to the sides.
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Old 01-14-2020, 02:08 PM   #4
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I can tell you soon what a 3800X with a 5700XT 16GB 3200MHz can do in DCS, got the parts in the mail, couple days and I will test DCS on it, tho my friend who bought the stuff is not a DCS player he said, "Xeah, let's see what it brings with YOUR flight game" haha

He has a 4790k and a toasted 760GTX, so he went all in and bought it all new.
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Old 01-14-2020, 04:27 PM   #5
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Thanks, I'm not sure if the best part of £800 would be worth it.

Timcat; are they high settings in VR, currently I need everything as low as it will go.
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Old 01-14-2020, 05:38 PM   #6
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Quote:
Originally Posted by Andrew u.k. View Post
Thanks, I'm not sure if the best part of £800 would be worth it.

Timcat; are they high settings in VR, currently I need everything as low as it will go.
Best option for your 4790 would be a good overclock.

I've recently upgraded from i7 3770K overklocked to 4.7Ghz, 16gb ram and GTX1080 to 9900KS, 32Gb 3200mhz RAM, GTX2080ti 11Gb.
With the same settings in DCS I got somewhere around 15%(guesstimated) more of the time with 90FPS instead of 45FPS. The old hardware almost never got under 45FPS, and with the new and same settings, I newer saw it stutter.

Event if the new CPU is some kind of rocket, it only differs 10% in Clock to 5.1/5.2Ghz. I guess the 9900KS is slightly faster per clock but in real DCS gaming, I still could see the single CPU core getting very high load. Maybe average 10-15% lower load, and with the same setting barely keeping below 100% at the worst case scenarios.

I dont think you should count on very big gains for the CPU only.
I saw better performance but I wasnt the CPU only that gave me these. I do otker stuff than DCS, other games and also workstation so the 9900KS was clearly motivated from that( and also, I hade the Money to spare anyway).

If you get yourself a descent overclock, maybe better cooling to cope with the heat and put the rest of the money you can spare on a new videocard, I think you'll get the best bang for the buck.
RAM-speed, do not show big differences in gaming. There is a difference but not very big numbers. For RAM yore sitting on, if not very slow it may expensive per gain in FPS. There is a good thread on this forum with tests of different CPU Clock, RAM Clock etc. Id say, when anyhow buing RAM you can put some extra cash in for speed but upgrading same type of RAM to faster is expensive.

I also think there is a lot of people around having RAM modules with XMP-profiles but not running the XMP-profile activated in the mainboard BIOS. Do you have that knowledge about your current RAM and settings ?
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Old 01-14-2020, 05:45 PM   #7
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Forgot to tell that I actually was able to run DCS with my i7 at 4.9ghz, and with that speed there would be a very small difference to the i9 9900KS@5ghz in DCS. Because of this, if DCS was the only thing, a change of CPU could'nt be motivated.
My computer is also used by my wife and being away I didnt dare to leave home with the 4.9ghz setting(fear of angry wife due to not working PC), thus making me set it at a guaranted safe overclock.
I guess the i7 4690 should be good for at least 4.7 or 4.8ghz.
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Old 01-14-2020, 08:07 PM   #8
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From memory: All textures high, Water high, Traffic low, no smoke, Trees 80%, Clutter 30%, Cockpit 512, No shadows, MSAA 2, PD 1.2 Steam VR SS 100%. I cap at 45 fps because I have motion vector re-projection turned on in steam.
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Old 01-15-2020, 06:19 AM   #9
Andrew u.k.
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Thanks for all the information, I'll take a look at overclocking, what Can go wrong!

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Old 01-15-2020, 07:07 AM   #10
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Quote:
Originally Posted by BitMaster View Post
I can tell you soon what a 3800X with a 5700XT 16GB 3200MHz can do in DCS, got the parts in the mail, couple days and I will test DCS on it, tho my friend who bought the stuff is not a DCS player he said, "Xeah, let's see what it brings with YOUR flight game" haha

He has a 4790k and a toasted 760GTX, so he went all in and bought it all new.
BitMaster, do you think it would be possible to cross-test the new GPU in the old computer vs the full-new setup?

I have one generation older CPU than your buddy, but have a feeling upgrading GPU should bring the most boost and upgrading CPU (no overclocking involved) would be just minor gain for our sims.
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