AMD Ryzen Discussion Thread.

[R-T-B]

Not any more. It was fixed, if you're running the latest version.

Fact is, no matter the haters, the value/performance ratio of Ryzen is fantastic. And it's not like it's a cheapie shit CPU. It's actually really good.

Indeed I am running the latest. Good stuff then.

 

[trparky]

OK, this may not make an ounce of sense but whatever, I'm going to say it anyways. If a Ryzen CPU at 4 GHz is getting Kaby Lake-like IPC against a Kaby Lake CPU at 4.2 GHz then that means (at least in my mind) the Ryzen CPU technically is more efficient and gets more IPC per clock than Kaby Lake.

The only thing that's really holding Ryzen back at this point is its relatively low clock speeds in comparison to a Kaby Lake CPU. If Ryzen could only be clocked to 4.5 or 4.7 GHz I have a feeling that Ryzen would wipe the floor with Kaby Lake.

 

[HTC]

OK, this may not make an ounce of sense but whatever, I'm going to say it anyways. If a Ryzen CPU at 4 GHz is getting Kaby Lake-like IPC against a Kaby Lake CPU at 4.2 GHz then that means (at least in my mind) the Ryzen CPU technically is more efficient and gets more IPC per clock than Kaby Lake.

The only thing that's really holding Ryzen back at this point is its relatively low clock speeds in comparison to a Kaby Lake CPU. If Ryzen could only be clocked to 4.5 or 4.7 GHz I have a feeling that Ryzen would wipe the floor with Kaby Lake.

I seem to recall a review with one of the Ryzen 7 chips @ 4.0 GHz (not sure which one) VS Intel 7700K @ 4.0 GHz and the 7700K still took the lead in most games but got trounced in pretty much everything else.

This was about 2 months ago IIRC, but there have been game, OS and several BIOSes patches / updates since then: do not know if this is still the case.

 

[the54thvoid]

OK, this may not make an ounce of sense but whatever, I'm going to say it anyways. If a Ryzen CPU at 4 GHz is getting Kaby Lake-like IPC against a Kaby Lake CPU at 4.2 GHz then that means (at least in my mind) the Ryzen CPU technically is more efficient and gets more IPC per clock than Kaby Lake.

The only thing that's really holding Ryzen back at this point is its relatively low clock speeds in comparison to a Kaby Lake CPU. If Ryzen could only be clocked to 4.5 or 4.7 GHz I have a feeling that Ryzen would wipe the floor with Kaby Lake.

Indeed it would but intel has the edge on raw clockspeed. The 7700k is far faster when overclocked.

 

[R-T-B]

Indeed it would but intel has the edge on raw clockspeed. The 7700k is far faster when overclocked.

In singlethreaded anyhow, yeah.

 

[trparky]

The 7700k is far faster when overclocked.

Didn't you get the memo from Intel? They don't want you overclocking the 7700k. They told us.

Intel tells Core i7-7700K owners to stop overclocking to avoid high temps | PCGamer

 

[m&m's]

Just wanted to post that my 4 sticks work fine @ 3200MHz with AGESA 1.0.0.6.

I only got to 4Ghz before heat got a tad too much to handle, but given my memory works great, I am more than happy.

Alright, might sound like a stupid question but shouldn't it run stock @4GHz+ (XFR) on all cores?

 

[R-T-B]

Alright, might sound like a stupid question but shouldn't it run stock @4GHz+ (XFR) on all cores?

I believe XFR doesn't provide turbo on all cores at once, but for 1-2 yeah up to 4.1 I believe. I'm prefer more multithreaded power though.

If I am wrong, then I'd like to know for certain, heh.

 

[FR@NK]

If I am wrong, then I'd like to know for certain, heh.

If temp and power draw allows it will run all cores up to 3.7GHz under heavy threaded workload.

Under workloads that only stress one or two cores, it can clock any one or two of the cores up to 4.1GHz if temp and power draw limits are not hit.

 

[R-T-B]

If temp and power draw allows it will run all cores up to 3.7GHz under heavy threaded workload.

Under workloads that only stress one or two cores, it can clock any one or two of the cores up to 4.1GHz if temp and power draw limits are not hit.

Ah. I think I'll keep it OC'd to 4Ghz then, as I have a gentoo VM that does a lot of compiles and can benefit from the multiple faster cores all turboing at once (I run make with 8 jobs).

I really feel Ryzens power there:

That's a recompile of my whole install to use AMD specific flags. It isn't even going to take an hour... that's insane!

 

[GoldenX]

Are you using any DE on that gentoo VM?
Why not make -j16?

 

[R-T-B]

Are you using any DE on that gentoo VM?
Why not make -j16?

No DE, it's a daily build server for LineageOS builds. -j16 would make my desktop laggy when a build kicked on. I assign it 8 threads precisely so multithreading keeps things moving. Works well.

 

[infrared]

Alright, might sound like a stupid question but shouldn't it run stock @4GHz+ (XFR) on all cores?

It'll put all cores to 3.7 or 2 cores to 4.1 which is pretty decent imo

 

[Rehmanpa]

Didn't you get the memo from Intel? They don't want you overclocking the 7700k. They told us.

Intel tells Core i7-7700K owners to stop overclocking to avoid high temps | PCGamer

Yeah not to mention overclocking suffers harshly from diminishing returns. A 3.0ghz to 4.0 cuz of will provide more benefit than a 4.0ghz to 5.0ghz oc, so overclocking a ryzen processor from 3.2ghz to 4.0ghz is going to have a larger performance increase than an i7 from 4.2 to 5ghz.

 

[EarthDog]

Yeah not to mention overclocking suffers harshly from diminishing returns. A 3.0ghz to 4.0 cuz of will provide more benefit than a 4.0ghz to 5.0ghz oc, so overclocking a ryzen processor from 3.2ghz to 4.0ghz is going to have a larger performance increase than an i7 from 4.2 to 5ghz.

Que?

 

[the54thvoid]

Que?

What was meant is if I have 3 ponies pulling a cart, adding another will increase the performance by a third. If I add another to go from 4 to 5, the performance increase over 4 is a quarter. It sounds like it makes sense but it's an unrealistic analogy.
You would need benchmarks to show the perf uplift in both cases as percentiles.

 

[EarthDog]

I can get behind that, but he never mentioned core count, just overclocking...

Oh wait...i see now...

That said, there isnt a single ryzen at 3ghz..1800x is 3.6 to 4ghz/4.1 ghz... say 500 mhz if you are lucky. 7700k is 4.2 to 5ghz+. 800 mhz. 1400x, if we are comparing apples to appes, is 3.5 to 3.9 xfr...so again 500 mhz assuming that cpu goes past it 100 mhz.

 

[infrared]

Yeah not to mention overclocking suffers harshly from diminishing returns. A 3.0ghz to 4.0 cuz of will provide more benefit than a 4.0ghz to 5.0ghz oc, so overclocking a ryzen processor from 3.2ghz to 4.0ghz is going to have a larger performance increase than an i7 from 4.2 to 5ghz.

I agree with Rehmanpa in terms of % increase on example he gave, but the diminishing returns is wrong in relation to clock speed (I think?). Performance should go up fairly linearly per MHz increase, the only diminishing returns is MHz per mV which is obvious. That's my understanding anyway.
Game benchmarks might show a limited increase with a cpu overclock, but pure cpu benchmarks will always improve, hence the crazy cinenbench scores with DICE/LN2.

 

[EarthDog]

Exactly... and we went over that recently with him. His mindset is gaming only last i recall...(and we werent talking about gaming at the time).

 

[Final_Fighter]

diminishing return really does not fit in this situation. as stated by infrared you could really only apply it to mhz per mv.

 

[R-T-B]

I got my memory running at DDR4-3466 without loosening timings.

It's official, the Ryzen IMC is running at a faster speed than my Kaby Lake could manage with this ram.

WTF? Not complaining lol.

 

[EarthDog]

Id imagine the bios loosened some of the secondary/tertiary timings more. KL IMCs are typically a hell of a lot stronger (for the moment).

 

[R-T-B]

Id imagine the bios loosened some of the secondary/tertiary timings more. KL IMCs are typically a hell of a lot stronger (for the moment).

But it's reading them out of XMP? Does XMP leave some timings to bios?

I'm also using the new beta AGESA 1.0.0.6

 

[EarthDog]

Those are the primary timings.

 

[infrared]

I'm hitting a brick wall at 3700mhz on mine (3650mhz on previous 1800x). That was only with 1.125v SoC, going up to 1.20v didn't yield better results. Upping RAM, CPU, 1.8v pll, VDDP didn't help, loosening primary timings didn't help.. hmm. I haven't tried upping the VTTDDR yet. I'm going to try adjusting some of the tertiary timings next time I'm having a fiddle. So far 3600mhz 14-14-14-34 @ 1.45v is my best config.

@EarthDog - I'm a noob with tertiary timings, do you know any good guides? Or is it just a case of going through each one with trial & error with memtest86+? It'd take days to go through them all :/