Undervolting performance testing

[Wing-Man]

What Undervolting what the best way to performance test to see when you have gone too fair.
Ive decided to make a second bios at stock speeds and under volt the crap out of my CPU but i dont want to have a negative impact on performance for games.

what the best benchmarks to use?

 

[Wing-Man]

Cinebench works very well, I found Prime95 hits the CPU too hard so it begins to throttle. Cinebench will show speeds more closer to what you'll see in games.

that super, already have that one installed.

 

[Wing-Man]

I capped my 5800X to 55 watts once as an experiment, it made absolutely no difference in games, it still boosted to 4.9Ghz.

i wont know how to do that? is there a power setting for max watt's?

 

[Wing-Man]

these days is it best to keep doing multiple runs vs the old days of running prime95 for hours?

prime as always been bad for cpu's and motherboard

 

[Wing-Man]

I think its in the advanced PBO settings.

i believe i have found the setting, the stock TDP for my cpu is 65w is 55w ok or should i play around?

EDIT:
So i turned on PBO to get to the setting and set 55w Max but now PBO is not letting the CPU boost because i have left all the other setting to auto.

EDIT / EDIT :
Found the power setting in a different menu so i can keep PBO off. its now boosting to 4.35 again and as dropped a few C's.
Thank you

 

[Wing-Man]

bad as in what ott unrealistic loads? I always used it to see if an oc was stable? so is that irrelevant these days for testing undervolting?

but it dose nothing of the sort. i remember having a system 24hr prime stable and it BSOD when i opened chrome..
its loads a system to a silly level all pushes past what is safe.

OcUK used to use it for the overclocked systems, the forums was full of people that have new systems what was crashing on boot...

 

[Wing-Man]

never heard of that happening back in the day? it was all we ever used to stress test for heat and stability upto the q6600 era.
so what actually does genuinely prove its stable these days now as I'm at a loss how something stressing the death past actual usage doesn't prove something is stable and how a Web browser doing bugger all in comparison could stress it?

there is no one test that dose it all. you need to test based on your use. if all you do is watch your tube and play games why do you use a test that hits the cpu with a constant heavy load, when want you need is constantly changing loads.

I use 3D Mark, RealBench, Cinebench R20 and aida64. i run them by there self in a loop and or more than one at the same time.
For ram you cant beat MemTest86 end off but ram dose one thing and only one thing. unlike a CPU that is constantly
changing work loads and types.

the first stress test is dose it post. but just because it posts doesn't mean it games.
when we are overclocking i keep bumping the multi until the system wont load to windows, that in itself is a test.

most CPU's will throttle when running prime if your not maxing the core how do you know its stable? then you open chrome and the cores hit full boost for 1 second and the system BSOF.

 

[Wing-Man]

it was all we ever used to stress test for heat and stability upto the q6600 era

thats about 25 years ago.

 

[Wing-Man]

yes, hence stating up till that point thats what we used and it worked for stability testing... That's why I'm genuinely shocked it's different now?

I've not used it for 15 years it's had a bad name for a long time

 

[Wing-Man]

Well, 15, but it's still a long time in this sector

I remember envying a housemate when he got a Q6600... and now I feel old.

i never had one, went C2D to AMD phenom ii

as I thought lol

the one reply the supports you... ** Please try not to bait other users - EVH **. the program is trash, occt uses the same testing method but in a more useable way but it still only hits one type of load and needs many other programs to show stable.
people say use it to test for heat.. WTF WHY?... ho no under a stupid load my CPU hits 91c but when i just use it normal 55c so in what world do you need to know about the 91c.
So many people start prime and go to bed, waking upto a dead PC. yes that a program i can get on board with.