Need help fine tuning my 7820x overclock

[nobiffbetter]

Hey guys, so recently I upgraded from a 7740x to a 7820x and I SERIOUSLY couldn't be happier. I use my pc mostly to game but I do also record while gaming, as well as do video/photo editing and rendering so finally having the full use of my mobo as well as the added power of 8c/16t CPU was a welcome experience.

My setup:

Roswil full size ATX -Tower
Aorus x299 gaming 3 extreme-Mobo
Aorus 1080ti extreme gaming- GPU
7820x -8 core 16 thread -CPU
Thermo grizzly krayonout for CPU to cooler -Thermo paste
Corsair case fans- 8 in total
Corsair RM750x -PSU
Corsair DDR4 2x8gb RGB -RAM
Corsair H100i-4x corsair high performance fans in push/pull-Cooler
Samsung 256gb SSD Samsung EVO PRO - BOOT
Samsung 500gb EVO SSD -Games only
WD-Blue 1T HDD- Vids/Pics/Backup
Windows 10 PRO -OS
Running latest F6 bios

Currently I got the CPU to 4.9ghz fairly easy on all 8 cores, the voltage is currently 1.29v and it's stable as a rock. My max temps are 80-88c under full load. I'm very happy with this overclock as many ppl can't get passed 4.7-4.8 with this CPU. My idle temps are around 18-22c even immediately after finishing a long stress which is just awesome. My case and AIO offers great cooling because of the way I have it set up.

VRM temps never go below 30 and ever get higher than about 55c and even 55c is pushing it cuz typically my vrm stays in the 38-48c range which is great.

My current benchmark from Cinebench R15 is between 2002 and 2037. My current XTU benchmark is 2790-2800.

My concerns: As you guys prolly saw, my PSU is a little under powered for the task? Do you guys think the rm750x is enough power for this monster CPU and GPU both being overclocked to the max? Currently my CPU under full stress test load pulls around 250-260watts alone, I havnt checked my gpu in awhile but it is overclocked very high as well and I'm assuming it's pulling 200-300watts as well... that's roughly 600watts give or take not including my ram, mobo, drives, fans, pci wifi card and other extras.

What PSU do you guys advise me to jump up to? I was thinking the rm850x or the rm1000x to be my next upgrade.

Now about fine tuning my overclock: Iv always been told that #1 importance in performance is CPU frequency and getting it as high as possible before adjusting ram, cache or anything else.. specially for better gaming performance which gaming is what I do the most.. currently being at 4.9ghz I don't have much more head room to increase my ram from stock bios settings.. I also don't have much room for increasing my cache.. so do you guys think it would be more benifitial to stay where I am at, at stock ram and stock cache but leaving my CPU at 4.9ghz.. or would i gain more performance if I backed it down to 4.8ghz and this way I know for a fact I can get my ram to 3000mhz instead of default.. as well as I can get my stock cache freq. to 3.0ghz instead of the stock freq.

What do you guys think I should do? Which option would give me the best performance? I know increasing my ram speeds and cache will increase my benchmark scores but will I see any better real world or gaming performance gain? Cuz if not then maybe I'm better off just leaving it at 4.9ghz.



Thanks for your help in advance!

 

[JalYt_Justin]

RM750X is a very good PSU, although you are right that you are probably pulling a lot of power from it especially with the massive overclocks. The bump up to an RM850X isn't a bad idea.

Concerning your overclock, if you're able to get 3000Mhz on your RAM by going to 4.8GHz, then do it. The difference between 4.8 and 4.9 GHz is basically nothing in real world usage, but the difference between 2133MHz and 3000MHz on RAM is a pretty significant boost by comparison. Cache will make little difference, so leave that where it is.

 

[nobiffbetter]

Your right the rm750x is a fantastic psu and it even has the built in caps on both the CPU power cable as well as the 24pin mobo and the gpu cables as well.. I picked that specific psu cuz I knew I would need a lot of power for my 7740x but never realized how much more power I would be using when upgrading to something like the 7820x.

So your saying back down my CPU to 4.8ghz and pull my ram up to 3000mhz? And that I should see better performance from doing that then I will see just leaving the ram defaulted and the CPU at 4.9ghz?

This is exactly why I wanted to Ask you guys what you thought cuz I wasn't 100% sure which would give me a greater real world benifit so thank you very much for answering my question.

Back to the psu. I was having the entire computer shut down on me whenever I would bring the cache frequency up to 2.8ghz-3.0ghz.. It was causing my entire pc to shut down and reboot during XTU benchmark. I know that increasing the cache will increase the load/wattage of the CPU by quite a bit but the fact that it was shutting down and rebooting on me makes me think that my psu is hitting over current protection.. I know my temps were in the 80s so that shouldn't have done it, VRM temps were only in the 40s.. and as soon as I backed my cache back down to stock freqancy it stopped doing that..

Do you think this is a good sign that I was going over the wattage limit of my psu? Increasing cache as we stated doesn't do much anyhow so I am fine with leaving it at default for now, but if I'm that close to my psus limits then maybe I should at least bump it up to the rm850x.

Do you know of anything else that could have been causing it to shut down and reboot at the start of XTU? I did a bunch of testing last night and narrowed it down to the cache increase as being the prime cause of it happening.

Any advise on this from you would be great! Thanks again!

 

[nobiffbetter]

So as I was saying, this Problem of the pc automatically shuttting down and rebooting only happens when my cache is turned up, and ONLY when benchmarking with XTU.. cinebench and realbench doesn't cause it to do this..

I'm assuming that it's cause XTU uses a ton of AVX instructions so what I feel is happening is that XTU is putting the CPU under such an intense load (specially with having the cache turned up) that would force the CPU to pull well over the average 250watts that It usually pulls which in my option is what is overloading the psu and causing it to hit over current protection..

That's my therory. But if I can get a few other ppl to chime in and let me know what they think is causing it that would be great. Cuz it would be re assuring to know a few other ppl agree with me, or if maybe a few other ppl think that something else could be causing this issue..

When it happends all CPU vrm and mobo temps look good. And it only happends with cache overclocked/turned up from stock..

It has to be just overloading my psu right??