As title sais, I am interested in documenting the release dates of this B2 revision, so if you got a Ryzen B2, please post here your manufacturing date.
For the ones who don't know how to spot it, it's the first four numbers fromt he second row, directly on the CPU.

View attachment 2545942

no it's not, it has a different number ending in the first row...the B2 of the 5900x ends with 63 instead of 61. This works for the 5800x as well, but I see that this doesn't work for the 5950x

 

Not at all, its already been documented that the 61 can be B2 too.

 

oh man... hahaha... ok... so let's see at wich production date the B2 starts... I may have one of the almost last batch of B0... 2119

 

Also this.

 

As title sais, I am interested in documenting the release dates of this B2 revision, so if you got a Ryzen B2, please post here your manufacturing date.
For the ones who don't know how to spot it, it's the first four numbers fromt he second row, directly on the CPU.

View attachment 2545942

B2 Stepping launched last year, so it has been already released to OEM manufacturers.
You can find here a B2 overclocking video from September 2021.
Maybe AMD didn't want to rebrand this new bin as an XT part, as AMD have done for the Ryzen 3k series.

The B2 release date and OEM shipment happened between Q2/Q3 in 2021.
No further information have been release since, aside a couple of days ago when the AMD marketing team poked the media about this stepping.

 

Just for clarity If someone reads too fast like I did at first, skattenbenchers b2 is an oem 5900 non-x 65W part. Not a normal 5900X b2 stepping.

 

this is my B0 5900x...

 

View attachment 2545951

this is my B0 5900x...

2119 - May 2021.

What's the difference between these revisions?

Word is they are a bit better binned.

 

What's the difference between these revisions?

 

I have 1 B0 ( BG 2148 SUT ) and 2 B2s ( BG 2143 SUS ). The two B2s definetly clocks higher with lower temps in my case.

 

Does we can say a Ryzen 5XXX BG 21XX SUS since week 43 and newer is a B2?

 

Interesting, so week 48 SUT still goes B0, while week 43 SUS goes B2.

 

B2 has also stronger IMC and better VF curve. There is one B2 5950X in HWBOT Superpi challenge. IMC is really 100-150 MHz betetr than most B0

Zen SuperPI 32M 5G/4G Challenge

community.hwbot.org

 

has it maybe to do with the factory SUS? that they changed earlier the manufacturing process than the other factory?

 

B2 is not binned. My 5950x is B2.
Both my no B2 and B2 cant go over 1866MHz FCLK.

 

Jesus that's bad. My 3700X can do 1900MHz FCLK but I never tried to go any higher as I doubt it can plus my RAM wouldn't be able to do 4000MHz with low timings so just never tried to find out if it can.

 

I have a 2118sus 5600x. It is B0. Golden sample.
I love these kind of research

 

The IF hole is related to a CPU flaws or could be fixed with AGESA update?

 

Any way to see when it's release in cpu z? I got a 5800x in last August but don't take a picture and mine was a b0 stepping

 

Testing now a 2142SUS with IF 1900. Its a B0.

 

Is it a 5950X ?

 

My original 5950x -> BG 2046 SUS = B0

new 5950x #1 out of 3 -> BG 2141 SUS = B0

new 5950x #2 out of 3 -> BG 2130 SUS = B0

new 5950x #3 out of 3 -> BG 2130 SUS = B0

Binning stats for all 4 cpus here

Spoiler: Silicon quality of my current 2130 SUS B0 super platinum / platinum sample after finetuning

 

BG 2142SUS = B0
BG 2143SUS = B2

note: there was no benefit with B2 over the B0 FCLK wise. Simply put, both could do 1900 FCLK, but anything higher results in WHEA.

 

Are the both 5950X ?

 

New 5950X 2146PGS - B0 Stepping

Just installed/first boot so no clue if this is stable.

 

What is your AGESA version ?

 

Since I've been upgrading both of my workstations:

2146PGS - B0 (Defective @ Stock - RMA)
2148PGS - B2
2150PGS - B2

Edit All three of these are capable of 1900 FCLK.

 

5950X or 5900X?

 

5950X - 2148PGS - B2 - Can do 1900 FCLK

 

So whats the earliest 5950x with B2 ? 2143 ?

 

Any one have X5950 BG 2149PGT ? B2 or B0 pls

 

5600X BG 2203 SUS - B2

 

Thank you so much thank you.

 

5900x BG 2143 SUS b2

2000 Infinity fabric, may be more i didn't try

1700 cb23 single core

-22 all cores CO and 200mhz PBO

Any suggestion to squeeze it more?

I just set it and no error

 

Get whea19s?

Try lowering CO more on the cores you can and tweaking ram

 

I got my 5950x from Microcenter.
BG 2148PGS

I was able to get Infinity Fabric to 1900MHz easily, but 2,000MHz caused boot loop. Using the Gigabyte X570SI mitx mobo and C14s.

Edit: B2 Stepping
I got it to boot into Windows @ 2,000MHz, but too many WHEA-Logger errors...

 

I got my 5950x from Microcenter.
BG 2148PGS

I was able to get Infinity Fabric to 1900MHz easily, but 2,000MHz caused boot loop. Using the Gigabyte X570SI mitx mobo and C14s.

is it a B2 or B0 ?