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Why 3800X? They are binned... I think

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post #111 of 127 (permalink) Old 08-13-2019, 08:08 AM
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Quote: Originally Posted by Nighthog View Post
Ok Guys I tested more BCLK on my Gigabyte Aorus Xtreme X570.

And I got 106BCLK to boot and enter BIOS and such. Trouble is all your SATA ports stop working. All your drives drop out and aren't detected. My M2 NVME drive was still there but it's not my OS drive...

This is worse than X470. On X470 I just avoided SATA 0 & 1 and I had 130.0BCLK useful, with X570 Any and all SATA ports are useless with BCLK clocking. They give trouble way earlier. Not even 101BCLK was too useful, unstable.

Seems the X570 implementation is much different for SATA than the older X470.

I had to drop down to Gen2 PCIE but unsure if that was really necessary. The boot freeze is because the SATA drives gave trouble with BCLK but as they weren't detected at all now it didn't freeze/reboot.



I feel like there's a lot of pontential with BCLK, like maybe +50 to 100 MHz to be had without too much voltage or heat. But it's just a new can of worms (variables) to be figured out.
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post #112 of 127 (permalink) Old 08-13-2019, 12:58 PM
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Quote: Originally Posted by Speedster159 View Post
My use case is about 70% percent video editing, how much of a difference are we talking about?
What software do you use for editing?

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post #113 of 127 (permalink) Old 08-14-2019, 03:55 AM
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Quote: Originally Posted by Bluesman View Post
I think you are over simplifying the situation with the 3800x. You get a higher sustained boost at "lower" temps.

First, I believe the PPT max for the 3800x, which is 142 watts, is in error. This is the PPT for a two chiplet (2CCD) 3900x not the 3800x even though that's what AMD literature states; thereby, giving both chips a 105 watt TDP. Here is a chart by ANANDTECH which illustrates my point"


Just look at the 16T column, it represents one CCD. Subtract the green values from the total of Core amount and you get about 133watts when adding the non-core values. This represents the max PPT for a 3800x compared to the 88 watts Anantech found for the 3700x and 142 watts for the 3900x. Source: https://www.anandtech.com/show/14605...ing-the-bar/19

In my opinion, the 3800x should hit the same frequencies as a 3700x but at lower temps. And as it clocks higher, because of its PPT headroom, it should attain higher frequencies. And attain these longer if you use PBO and PBO2 like I do. It depends on the load whether you sustain 4400 all core for any length of time. I have one game where it does (total CPU Package power = 63 watts and at 65C) but some stress programs, like Prime95 (total CPU Package Power = 116+ watts), I can only hit 4.225 before it throttles at 80C (my throttle setting is 85C not 95C because I'm paranoid.)

YMMV and the usual caveats.
After seeing a few 3800x reviews (very few 3800X reviews around), I find it VERY hard to go for a 3800x over a 3700x. Even the 3600 scores better in some results then the 3900x...
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post #114 of 127 (permalink) Old 08-14-2019, 04:39 AM
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Quote: Originally Posted by JarleH View Post
After seeing a few 3800x reviews (very few 3800X reviews around), I find it VERY hard to go for a 3800x over a 3700x. Even the 3600 scores better in some results then the 3900x...
The thing is the silicon is better for 3800X than 3700X. If your running stock it doesn't matter but if you want to mess with it the 3800X will give you a better experience.

The worst 3800X is better than the best 3700X. At least looking at silicon lottery's binning and my own 3800X sample.
I've got a bottom barrel 3800X and it's still better than their best 3700X.

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post #115 of 127 (permalink) Old 08-14-2019, 05:34 AM
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If you need cores for productivity I'd surely wait for the 3950X as these will be the cherrypicked die's, this one and the upcoming Sharktooth Threadrippers.

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post #116 of 127 (permalink) Old 08-14-2019, 09:04 AM
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Here is the Silicon Lotery Binning Statistics https://siliconlottery.com/pages/statistics

Iam glad i got the 3800x too bad all the reviewers where telling peeps to not get the 3800x for 40 euros more its a nice bump in freq imo

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post #117 of 127 (permalink) Old 08-14-2019, 09:23 AM
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Quote: Originally Posted by usoldier View Post
Here is the Silicon Lotery Binning Statistics https://siliconlottery.com/pages/statistics

Iam glad i got the 3800x too bad all the reviewers where telling peeps to not get the 3800x for 40 euros more its a nice bump in freq imo
Well if that is the case then I have a pretty good Ryzen 9 3900X.... stable at 4.3ghz using 1.28 vcore... no I don't want to run Prime95 as I think it is a waste and a heat generator. IBT with linpack is good enough for me. But my cpu will work 4.2ghz at 1.25vcore if I run Prime95.

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post #118 of 127 (permalink) Old 08-14-2019, 09:24 AM
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Doing all-core OC, yes the 3800X is worth the price difference.
But for my case, I'm loosing ST doing so and I'm on the same level as a 3700X.

I still have not figured out how to take an noticeable advantage of the 3800X when using stock/PBO/XFR.

I tried every suggestion in this thread, but it just won't boost to the advertised clocks.

The only thing that worked, for reaching (partially) my boost clocks:
  • disable PBO everywhere in the BIOS
  • change CPU clock control from 100 Mhz to 101 MHz (Aorus Pro is not able to change in 0.1 steps )
  • undervolting by setting VCore to normal and a negative offset with best Cinebench scores (mine is -0.01875V)

Atleast I'm breaking 5000 pts in MT with those settings. (manual 4.3 GHz all-core OC reaches way above 5150 pts)
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post #119 of 127 (permalink) Old 08-14-2019, 11:08 AM
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Quote: Originally Posted by VPII View Post
Well if that is the case then I have a pretty good Ryzen 9 3900X.... stable at 4.3ghz using 1.28 vcore... no I don't want to run Prime95 as I think it is a waste and a heat generator. IBT with linpack is good enough for me. But my cpu will work 4.2ghz at 1.25vcore if I run Prime95.
But Prime95 is more resilient. (requires more for stability) Your basically set for 100% no issues if you pass there.

You can't say you have as good chip unless you do the same testing.

I found I'm at the bottom barrel for 3800X bins. Some cores just refuse to work as I want them in Prime95 AVX2/AVX smallFFTs, One core in particular has a hard limit when running AVX2/AVX @ 4250Mhz in reality I found. The rest where mid-tier mostly. None in particular was as good as Silicon Lottery best bins example.

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post #120 of 127 (permalink) Old 08-14-2019, 11:27 AM
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Great Post!!

Quote: Originally Posted by usoldier View Post
Here is the Silicon Lotery Binning Statistics https://siliconlottery.com/pages/statistics

Iam glad i got the 3800x too bad all the reviewers where telling peeps to not get the 3800x for 40 euros more its a nice bump in freq imo
I thought this was the case based on comments throughout overclock.net. But I never saw hard evidence supporting my bias.

Thanks you for this reference. I may just try some static OCs to see where my chip lies.

Always Searching for Perfection,

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