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3800x thread.

Playing my cores don't go further than 4.3ghz, with cinebench no more than 4.1 or 4.2 there is something wrong because with windows I can see 2 or 3 reaching 4.5ghz
 
belcebuu said:
Playing my cores don't go further than 4.3ghz, with cinebench no more than 4.1 or 4.2 there is something wrong because with windows I can see 2 or 3 reaching 4.5ghz
Click to expand...


In afterburner during gaming I see a steady fluctuation between 4.35 and 4.4Ghz on all cores. This is in PUBG. What game were you playing?
 
belcebuu said:
Playing my cores don't go further than 4.3ghz, with cinebench no more than 4.1 or 4.2 there is something wrong because with windows I can see 2 or 3 reaching 4.5ghz
Click to expand...
Woodsta888 said:
In afterburner during gaming I see a steady fluctuation between 4.35 and 4.4Ghz on all cores. This is in PUBG. What game were you playing?
Click to expand...
I was playing a bit of Control, and yeah I saw some spikes at 4.4ghz but just for seconds, almost all the time 4.235-4.350 never 4.5
 
My rig is basically a Project Cars 2 rig and my "max" column has at least one core showing 4.5. (Saw 4525 the other day). I'm not really looking to re-do my ram timings, so it would take a sizable bump in *actual performance* for me to consider a new BIOS.
 
Upgraded to a 3800x, literally done nothing else than install windows and chipset drivers. I've not updated the bios or touched any settings in the bios. Ran a quick Cinebench run to have a quick look, one core hits 4.55GHz, a few more 4.5. Quick question, even at idle its pulling 1.4v, surely it should drop right off? Cheers
 
The cores are hyper-sensitive to just about any load in all but the latest ABBA bios. (And it's still beta for most motherboards) even just monitoring the cpu can make it best frequency and voltage.

1.4v is safe at light load though.
 
pagepack said:
Upgraded to a 3800x, literally done nothing else than install windows and chipset drivers. I've not updated the bios or touched any settings in the bios. Ran a quick Cinebench run to have a quick look, one core hits 4.55GHz, a few more 4.5. Quick question, even at idle its pulling 1.4v, surely it should drop right off? Cheers
Click to expand...

Yeah, it doesn't seem to be a problem according to AMD, I usually notice the voltage drops back to 1.3xxx under load. I think they're working on making this more stable.
 
Wucked said:
It doesn’t make sense to me that it somehow requires north of 1.4v for light loads, but less for heavier loads.
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Power usage and temperatures.

It requires higher voltage to support boost frequencies under low load. Running heavier loads at such voltage would be detrimental to the health of the chip.
 
Wucked said:
It doesn’t make sense to me that it somehow requires north of 1.4v for light loads, but less for heavier loads.
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Every CPU has a current limit to work within.

Light loads make the CPU boost a couple of cores higher, therefore needs higher voltages to sustain a higher frequency in those cores, but as the load is light, the current draw is less (e.g 2 cores @ 1.5v for 4.5Ghz is low current)

Heavier loads make the CPU boost lower, therefore needs less voltage to sustain the lower frequencies, this is offset by the fact that heavier loads generally use more if not all of the cores, meaning higher current. (e.g. 8 cores @ 1.2v for 4Ghz has a high current)
 
Wucked said:
Ah, ok. That makes sense, I was being stupid and thinking about voltage in isolation.
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No worries. Yup, unfortunately you can't view voltage in isolation :P

It also doesn't help that we've been used to pretty much the same CPU architecture from Intel for many years now and used to how they work and behave, and yet in the space of 3 years from AMD we've have 2 very different architectures and the way they behave is quite different.
 
3800X (+ stock cooler) B350M Mortar.
Bios CPU fan speed - 20% @ 20c / 40% @ 40c / 60% @ 60c / 80% @ 80c
Bios PBO disabled everything else on Auto apart from RAM @1.3v.
No XMP.
RAM @ 2933 -14 16 16 (will not do 3200).
p4Dc0Ky.jpg.png
 
Could it be that, after all the consumer gains that can be had from OC'ing (an enthusiasts pastime), 3rd party companies testing, binning and charging for their findings on retail bought CPU's... have found that

Finally AMD have managed to pull off a CPU that requires no OC'ing for the layman. To get nearly as much extra performance as experienced OC'ers, a no brainer for the server market due to the new 7nm arch.... alone only measuring power consumption?

Now maybe, we have CPU's where an algorithm works out the maximum performance from the parameters that OC'rs use. Based on temps, voltages, etc etc. Not only pre binned....but an algorithm that considers your choice of other hardware such as MOBO VRM's, cooling etc???

Just a drunken thought
 
Tightening RAM timings are big for 3d mark scores. With good tight RAM timings @ 3800 you get the same performance increase as having a decent all cores overclock.
 
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Leave it all at default for the boost to work properly.

My 3800X after my cheapa55 MOBO (£160) was updated to ABBA does 4.6+ on 4 cores and 4.55 on all others. Obviously not at the same time.

A benchmark/stress still only sees it at 4.2 all cores, but gaming with PUBG before the patch saw 4.35 all core but then the cores aren't loaded to 100% like a bench or stress test. Not gamed yet with ABBA but hoping in PUBG to see all core go to 4.4.

https://i.postimg.cc/9fD9YjYZ/HWinfo-4-6.png
 
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