*** AMD "Zen" thread (inc AM4/APU discussion) ***

[DragonQ]

https://twitter.com/CPCHardware/status/840565557334286336



Look like AMD have problems with 4 cores Ryzen 5 1400 and 1300 CPUs yield. These Ryzen 5 CPUs cant clock higher than 3.2GHz. Ryzen 5 1400 or 1400X Turbo clock suppose to be 3.9GHz and 1300 Turbo clock suppose to be 3.5GHz.



If true then people dreaming to get these 4 cores Ryzen 5 CPUs and OC it to 4GHz can forget it. No chance to match i5 7600K and i7 7700K peformance.

What are you on about? Every single one of the R5s has a higher base clock than the R7 1700, which we already know clocks to 3.8-3.9 GHz. Why wouldn't the R5s clock as high? How you can extrapolate about yield issues based on this chart is beyond me.

 

[AllBodies]

Wouldn't it logically be 10 core?

Each CCX is 4 cores so it'd be 12 core, unless it's salvaged from a 12 core server chip. Then it could be 10.

 

[Panos]

https://twitter.com/CPCHardware/status/840565557334286336



Look like AMD have problems with 4 cores Ryzen 5 1400 and 1300 CPUs yield. These Ryzen 5 CPUs cant clock higher than 3.2GHz. Ryzen 5 1400 or 1400X Turbo clock suppose to be 3.9GHz and 1300 Turbo clock suppose to be 3.5GHz.



If true then people dreaming to get these 4 cores Ryzen 5 CPUs and OC it to 4GHz can forget it. No chance to match i5 7600K and i7 7700K peformance.

What are you talking about? Ryzen 5 1400X is less than half the price of the 7700K. Of course is not on the same price bracket nor should expect to perform the same.
Nor is on the same price bracket with the 7600K. You have to compare it with the i3s that sitting down there and the R3s with the dual cores.

The direct competitor to the 7700K is the R7 1700, because they are on same price bracket, even if the 1700 is cheaper.....

 

[CAT-THE-FIFTH]

In fairness you could say the exact same about the Radeon HD7000 series. When it launched the flagship HD7970 could barely keep up with the GTX670, but after all the patches, firmware updates, etc it was closer to the GTX780 than the GTX680 (which was now being dueled by the HD7950)

But the HD7970 was still the fastest card when it launched though!!

 

[d_brennen]

Wouldn't it logically be 10 core?

Logically it would be 16 core, wouldn't expect that until 7nm

 

[N19h7m4r3]

But the HD7970 was still the fastest card when it launched though!!

Wut?! How dare you! Everyone knows the GTX 580 gave it a good thrashing, and it certainly could never hold a candle to the mighty GTX 680!

...boy do I regret buying the 580, and then 680 over the 7970/Ghz at the time. :/

 

[muon]

It makes next to no sense that R5 can't clock as high as R7.

 

[CAT-THE-FIFTH]

Wut?! How dare you! Everyone knows the GTX 580 gave it a good thrashing, and it certainly could never hold a candle to the mighty GTX 680!

...boy do I regret buying the 580, and then 680 over the 7970/Ghz at the time. :/

LOL,the main issue with the HD7970 was AMD had very low stock clocks - the HD7970 once overclocked really made the GTX580 look quite ordinary!!

 

[CAT-THE-FIFTH]

Emm:

http://cdn.wccftech.com/wp-content/uploads/2017/03/AMD-Ryzen-5-1600X-and-Ryzen-5-1500X.jpg

The R5 1600X and R5 1500X clocks have been confirmed and the lower end Ryzen CPUs will be fighting locked Core i3 CPUs.

Edit!!

CPC are talking about the R3 CPUs,which are 4C/4T and at 3.2GHZ~3.4GHZ these should be enough to take on a Core i3!!

 

[N19h7m4r3]

LOL,the main issue with the HD7970 was AMD had very low stock clocks - the HD7970 once overclocked really made the GTX580 look quite ordinary!!

They were far too conservative; hence that GHz Edition during the GTX 680 time.

I remember lying in hospital with a tablet reading about the GCN architecture when they were launching. Great stuff, and then like a fool opted for NVIDIA.

I also got a GTX 470 back in the day over the 5870.

 

[PhoenixUK]

https://twitter.com/CPCHardware/status/840565557334286336



Look like AMD have problems with 4 cores Ryzen 5 1400 and 1300 CPUs yield. These Ryzen 5 CPUs cant clock higher than 3.2GHz. Ryzen 5 1400 or 1400X Turbo clock suppose to be 3.9GHz and 1300 Turbo clock suppose to be 3.5GHz.


If true then people dreaming to get these 4 cores Ryzen 5 CPUs and OC it to 4GHz can forget it. No chance to match i5 7600K and i7 7700K peformance.

It's marketing - if they clocked the turbo any higher why would anyone buy the more expensive ones? Same goes for the 1700 vs 1800x argument, if the 1700 turbo'ed to 4ghz why would anyone buy the 1800x??

Need to leave some headroom for next generation as well, it's obvious they're not going to push them to the limits for retail. I don't see a reason why 3.5>3.9 wouldn't be achievable if every 1700 on the market does 3.0>3.9

 

[CAT-THE-FIFTH]

They are talking about the R3 CPUs which are being pitched towards the Core i3 CPUs. Even at 3.2GHZ~3.4GHZ they should be pretty solid.

 

[Panos]

They were far too conservative; hence that GHz Edition during the GTX 680 time.

I remember lying in hospital with a tablet reading about the GCN architecture when they were launching. Great stuff, and then like a fool opted for NVIDIA.

I also got a GTX 470 back in the day over the 5870.

Fast forward to 2017. The 7970 still runs fine, supporting DX12 also and Async compute.....
Where even the GTX780 has bitten the dust.......

 

[Ubardog]

Hey Mat I got c6h and followed your step by step Pstate and following the post on overclock.net. Too much info there so i follow yours from here.
Only thing I'd like a 2nd opinion on is these volts. you think they wrong readings from mobo coz they high across board. Psu is brand new leadex II Gold Thanks

 

[Deleted member 66701]

The

Fast forward to 2017. The 7970 still runs fine, supporting DX12 also and Async compute.....
Where even the GTX780 has bitten the dust.......

The 7970 is a stonking car. My son has my 7970 Matrix Plat in his machine and it's performing so well that I'm considering not putting my 980ti in his machine when I upgrade and flogging instead.

 

[jigger]

Guys for gaming purposes mostly, can anybody point me towards/give me an analysis of benefits to upgrading to a 1700 from my xeon 5660?

I can't tell you how much exactly but, Ryzen is a lot faster than the i7 Xeon. It's also a lot cooler than an overclock Xeon 6 core.

 

[N19h7m4r3]

Fast forward to 2017. The 7970 still runs fine, supporting DX12 also and Async compute.....
Where even the GTX780 has bitten the dust.......

Oh yes, the GTX 580 is now in my old man's mini ITX solidworks machine, as it still has decent compute.
Although I did play the Witcher 3 on launch at 1920x1200 medium settings well with the card.

GTX 680 was sold off.

Sadly very few NVIDIA cards have real longevity.

 

[Panos]

Those who query about the Zen clocks.

There is a big article few pages back and I ill stay only on this.
The Samsung Zeppelin architecture used on the Zen, is designed to run optimal between 3.3-3.5. After that the curve of power to speed ratio gets high, and there is a cap with normal cooling at around 4-4.2Ghz.

However have faith. The new Samsung Zeppelin+ architecture, which is going into Zen+ is designed for much higher clocks and greater performance per clock at reduced power envelop also.
In addition, AMD has proven that the current Ryzen IPC is strong enough and beats the B-E IPC, while it overclocks at similar levels of performance.
Don't forget that, because while the prices are low that was the AMD target and has achieved it.

From the gazillion of 6900K, only the very best ones break the 4.2 mark with max speed the 4.4 for the second highest bracket. Hell many cannot go over 4Ghz without watercooling, while we have Ryzen at 3.9 with the stock Wraith spire air cooler!!!!!!!

Second is new architecture and personally love all the tweaking that is still unknown to us all. Now we understand that high speed and loose timings, is must for the Ryzen CPU. Because the Northbridge comms runs at 50% the RAM speed. And that affects the performance.
Something we need to take into consideration, that up to now both Intel and AMD cpus performance in relation to RAM, was pretty much stuck.
2400mhz was the point of diminishing returns, and was barely much gain using 3600Mhz ram against 2400Mhz Ram. But that has changed with Ryzen.
The higher the ram speed, the faster the system works. Imho we might see real perf when AMD and mobos update their BIOS to allow us even faster RAM as high as 4000Mhz (aka 4Ghz!),

I say interesting times ahead, especially for those of us who want to start tweaking and truly go back to proper "Overclocking".

(something applaud Nvidia with the Boost 3.0 curve, making overclocking on the Pascal cards really interesting).

 

[Hagar]

I say interesting times ahead, especially for those of us who want to start tweaking and truly go back to proper "Overclocking".

Why also it is important to buy a top motherboard for overclocking if you can. The ROG community is excellent, commitment and backup from key ASUS techs as well as a well featured bios are paramount, LLC etc.

I was sold on my CHV, now keenly waiting its replacement.

 

[BigDaddyKong]

https://community.amd.com/community/gaming/blog/2017/03/13/amd-ryzen-community-update?sf62107357=1

I don't know if this has been posted.

We have investigated reports alleging incorrect thread scheduling on the AMD Ryzen™ processor. Based on our findings, AMD believes that the Windows® 10 thread scheduler is operating properly for “Zen,” and we do not presently believe there is an issue with the scheduler adversely utilizing the logical and physical configurations of the architecture.



As an extension of this investigation, we have also reviewed topology logs generated by the Sysinternals Coreinfo utility. We have determined that an outdated version of the application was responsible for originating the incorrect topology data that has been widely reported in the media. Coreinfo v3.31 (or later) will produce the correct results.

The primary temperature reporting sensor of the AMD Ryzen™ processor is a sensor called “T Control,” or tCTL for short. The tCTL sensor is derived from the junction (Tj) temperature—the interface point between the die and heatspreader—but it may be offset on certain CPU models so that all models on the AM4 Platform have the same maximum tCTL value. This approach ensures that all AMD Ryzen™ processors have a consistent fan policy.

Specifically, the AMD Ryzen™ 7 1700X and 1800X carry a +20°C offset ....