AMD Zen 3 (5000 Series), rumored 17% IPC gain.

CAT-THE-FIFTH · 7 May 2020 at 14:25

The ROM size excuse is a load of BS. Many B450 motherboards like the Max range have the same 32MB ROM size as X570 motherboards.

AMD argues that it ran into ROM size limitations when trying to cram AGESA microcode for all the older processors.

We find that hard to believe because B450 motherboards with the latest ComboAM4 AGESA support 2nd gen and 3rd gen processors, including APUs and Athlon SKUs based on the two.

Even TPU does not believe it! So most mainstream Zen2 owners are like Intel CFL owners,a one CPU generation. LOL!

At least I bought my system in 2018,so had a lot of use of my system.

Perfect_Chaos said:
I would be pretty ****** if I had bought a B450 instead of a x570 at this point

Most mainstream Zen2 buyers then. LOL!

Robert896r1 · 7 May 2020 at 14:33

A lot of the techtubers, reviewers and the community members really pushed the 450 boards so there's going to be some backlash on this. Someone should go back and see if AMD ever spoke officially on the matter or this was an assumption created by the community itself and perpetuated.

Nutella33 · 7 May 2020 at 14:41

Be interesting to see if motherboard manufacturers enable it anyway. there doesn't seem to be a hardware limitation after all.

LeMson · 7 May 2020 at 14:52

******************** at my tomahawk max not supporting the new stuff

NinjaCool · 7 May 2020 at 14:53

No Ryzen 4000 (ZEN 3) CPU support for X370, B350, X470, B450 motherboards :eek:

Perfect_Chaos · 7 May 2020 at 15:01

CAT-THE-FIFTH said:
Most mainstream Zen2 buyers then. LOL!

So basically any board you buy for next platforms for either Intel or AMD won't be good for more than maybe 1-2 upgrades maximum.

I only went with an X570 board because it had PCIE4 and was newer etc and needed a new board since my x99 one gave up at the time, wouldn't really have expected that they would exclude all previous boards for their last AM4 chip, seems a bit strange.

SonicSW20 · 7 May 2020 at 15:06

My guess would be that this is the line for *official* support, but there's nothing stopping board manufacturers releasing a compatible BIOS for B450 if they choose to.

Will have to go back through all the marketing ***** from the past few years, its safe to assume the message most people got was AM4 boards will support up to Ryzen 4000, subject to board manufacturer support.

humbug · 7 May 2020 at 15:08

What AMD actually said:

https://www.techpowerup.com/239343/...ryzen-pinnacle-ridge-confirmed-to-support-am4

AMD representative James Prior confirmed that the company plans to keep AM4 its mainstream-desktop processor socket all the way up to 2020, which means at least another two to three generations of processors for it.

all the way up to 2020

How should we interpret "up to" ? Serious question, i don't know if we should take that as Including 2020 or not?

NinjaCool · 7 May 2020 at 15:09

So apparently its because of ROM size (bios) limitations as I talked about earlier but come on... there are B450 motherboards like the popular MSI Tomahawk MAX that has a big 32MB bios chip ready for it!

CAT-THE-FIFTH · 7 May 2020 at 15:09

Perfect_Chaos said:
So basically any board you buy for next platforms for either Intel or AMD won't be good for more than maybe 1-2 upgrades maximum.

I only went with an X570 board because it had PCIE4 and was newer etc and needed a new board since my x99 one gave up at the time, wouldn't really have expected that they would exclude all previous boards for their last AM4 chip, seems a bit strange.

All the people hating on Intel,now can see AMD makes excuses too when it suits them. A lot of newer and better B450/X470 motherboards have the 32MB BIOS chips,like the X570 so its just because AMD can.

Gerard · 7 May 2020 at 15:09

NinjaCool said:
No Ryzen 4000 (ZEN 3) CPU support for X370, B350, X470, B450 motherboards

I would have to question that image, a 3900x works on x370, that seems to say it doesn't. Wheres that image from anyway?

CAT-THE-FIFTH · 7 May 2020 at 15:11

NinjaCool said:
So apparently its because of ROM size (bios) limitations as I talked about earlier but come on... there are B450 motherboards like the popular MSI Tomahawk MAX that has a big 32MB bios chip ready for it!

Mine had it in 2018! I kind of find it funny the Asus ROG Hero X470 which has a bigger BIOS chip isn't supported.

Gerard said:
I would have to question that image, a 3900x works on x370, that seems to say it doesn't. Wheres that image from anyway?

I am hopeful OEMs ignore AMD,but after the PCI-E 4.0 fiasco,I expect they can force not to,if they wanted to!

NinjaCool · 7 May 2020 at 15:11

Gerard its from the techpowerup article: https://www.techpowerup.com/266710/...r-zen-3-older-am4-motherboards-not-compatible

_Cereal_ · 7 May 2020 at 15:12

As a b450 Max owner that was intending to upgrade.... What a load of BS, they just lost one processor sale and lets say i will think twice before buying anything of them, one generation motherboard....

subbytna · 7 May 2020 at 15:12

Perfect_Chaos said:
I would be pretty ****** if I had bought a B450 instead of a x570 at this point

This is why I went x570, even though it's only a Ryzen 3600. When I drop the 4*** 8core in next year, I'll be fine. Plus now I'm enjoying PCIe Gen 4 SSD. It's so fast.

CAT-THE-FIFTH · 7 May 2020 at 15:14

subbytna said:
This is why I went x570, even though it's only a Ryzen 3600. When I drop the 4*** 8core in next year, I'll be fine. Plus now I'm enjoying PCIe Gen 4 SSD. It's so fast.

Problem is that a lot of people who used the B450 were on a budget,so the chance they could drop in a better CPU in a few years time,is really useful for them. Remember,the X570 motherboards were quite pricey at launch too.

I am saddened they pulled this stunt,but at least I had my motherboard since 2018 with Zen+ so I have at least one more generation. People who have bought into this chipset much later,ie,will upgrade later than me to AM5,will probably be not happy at all.

_Cereal_ said:
As a b450 Max owner that was intending to upgrade.... What a load of BS, they just lost one processor sale and lets say i will think twice before buying anything of them, one generation motherboard....

Your not the only one I hear saying this now.

humbug · 7 May 2020 at 15:15

NinjaCool said:
So apparently its because of ROM size (bios) limitations as I talked about earlier but come on... there are B450 motherboards like the popular MSI Tomahawk MAX that has a big 32MB bios chip ready for it!

ASRock have a warning on the BIOS page for my motherboard, because of the size of the BIOS chip updating the BIOS to Zen 2 compatibility removes Zen 1 compatibility.

The BIOS chip is only 8MB, i think B450, other than the MSI Max, are 16MB.

humbug · 7 May 2020 at 15:17

I was looking at the MSI X470 GAMING PLUS MAX, i don't know what to do now?

Gerard · 7 May 2020 at 15:18

NinjaCool said:
Gerard its from the techpowerup article: https://www.techpowerup.com/266710/...r-zen-3-older-am4-motherboards-not-compatible

That slide does come off as a bit odd, is 3900x not officially supported on x370 then? Even a b350 or an a320 can run a 3900x yet that slide says nope.

humbug · 7 May 2020 at 15:21

Is there some sort of announcement today? a lot of reviewers talked about a "Thursday Announcement" i take it this is it....