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  Topic Review (Newest First)
07-07-2020 03:40 PM
crakej
Quote: Originally Posted by nick name View Post
I've heard several reviewers say that their XT skus all hit 1900 FCLK no problem. And Level1Tech showed their 3900XT at 46.75 43.75 at 1.4V (that voltage is probably more than most are comfortable are at though).

LTT mentioned a BIOS version for XT processors, but said they didn't use it as AMD said old BIOS versions should run the XT skus.
I've noticed that if I leave hwinfo for a few hours, my cores are boosting to 4.6 or more much more often than they used to - I've even seen one core boost to 46.3 that I've never seen go over 4.3 (core 5).

Have yet to try pushing the CPU OC in the bios.... more fun!

1.4v........hmmmmmm
07-07-2020 03:35 PM
crakej
Quote: Originally Posted by Delta9k View Post
Thank you!
07-07-2020 11:10 AM
nick name
Quote: Originally Posted by tcclaviger View Post
So 3900xt seems to be better all core OC than 3900x, but still a strong/weak CCD arrangement, just both are stronger than average 3900x CCDs, if you have a strong 3900x there's no change in all core OC. Per CCX is likely better, no one has posted anything yet, no mention of IF yet on any reviews.

Of more interest, what the reviews show is that the 3000 series SKU selection is more about core count and boost is more about motherboard selection.

Differing sites show wildly differing boost behavior, boost levels, and performance as a result.

It's hilarious to see reviewers down on the XTs when they loved the x counterparts in 2019, all because of price creep on the x parts adjusting expectations.
I've heard several reviewers say that their XT skus all hit 1900 FCLK no problem. And Level1Tech showed their 3900XT at 46.75 43.75 at 1.4V (that voltage is probably more than most are comfortable are at though).

LTT mentioned a BIOS version for XT processors, but said they didn't use it as AMD said old BIOS versions should run the XT skus.
07-07-2020 09:25 AM
tcclaviger So 3900xt seems to be better all core OC than 3900x, but still a strong/weak CCD arrangement, just both are stronger than average 3900x CCDs, if you have a strong 3900x there's no change in all core OC. Per CCX is likely better, no one has posted anything yet, no mention of IF yet on any reviews.

Of more interest, what the reviews show is that the 3000 series SKU selection is more about core count and boost is more about motherboard selection.

Differing sites show wildly differing boost behavior, boost levels, and performance as a result.

It's hilarious to see reviewers down on the XTs when they loved the x counterparts in 2019, all because of price creep on the x parts adjusting expectations.
07-07-2020 08:18 AM
xeizo
Quote: Originally Posted by nick name View Post
I think I'm more excited about the 4700G though. As something to play with -- it seems very promising.

I can't even POST with LN2 mode.
4700G definetely more promising judging from the leaks, but then Zen3 ain't that far away
07-07-2020 07:48 AM
nick name
Quote: Originally Posted by tcclaviger View Post
Agree on the 3900xt being a positive indicator for dual good CCDs. Just with GB could show max temp and voltage info, but, we'll know soon.

In the end, while AMD LN2 option did allow higher fclk use, it was not 100% stable at anything over 1882ish fclk.

So fclk is my hard bottleneck 😞. First time I've ever had a bus limit an overclock before temp/voltage/speed did so.
I think I'm more excited about the 4700G though. As something to play with -- it seems very promising.

I can't even POST with LN2 mode.
07-07-2020 07:11 AM
Delta9k
Quote: Originally Posted by crakej View Post
I noticed a couple of you are using a different Timing Checker than I've been using (black background)

Anyone got a link for that?
This one, Zen Timings ?

https://github.com/irusanov/ZenTimings/releases
07-07-2020 02:19 AM
crakej I noticed a couple of you are using a different Timing Checker than I've been using (black background)

Anyone got a link for that?
07-06-2020 12:53 PM
tcclaviger
Quote: Originally Posted by nick name View Post
I've been looking at some of the XT Geekbench scores and it appears there are a few runs that were done with all-core overclocks. I saw several (on 3600XT, 3800XT, 3900XT) at 4.5GHz and one at 4.525GHz. That seems promising -- especially on the 3900XT.
Agree on the 3900xt being a positive indicator for dual good CCDs. Just with GB could show max temp and voltage info, but, we'll know soon.

In the end, while AMD LN2 option did allow higher fclk use, it was not 100% stable at anything over 1882ish fclk.

So fclk is my hard bottleneck 😞. First time I've ever had a bus limit an overclock before temp/voltage/speed did so.
07-06-2020 11:56 AM
nick name I've been looking at some of the XT Geekbench scores and it appears there are a few runs that were done with all-core overclocks. I saw several (on 3600XT, 3800XT, 3900XT) at 4.5GHz and one at 4.525GHz. That seems promising -- especially on the 3900XT.
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