Single CCX Ryzen and infinity fabric

[Islam Ghunym]

does Memory OC preferred over core clock OC on a single CCX AMD Ryzen CPU for gaming?

[Haro]

Do you mean CPPC? 

[Islam Ghunym]

4 minutes ago, TofuHaroto said:

Do you mean CPPC? 

Ryzen 1300X for example?

[Vishera]

Single CCX is the better option due to the lower latency.

[Islam Ghunym]

2 minutes ago, Vishera said:

Single CCX is the better option due to the lower latency.

that why I am asking if memory OC is vital over core clock here for game FPS?

 

[Haro]

3 minutes ago, Vishera said:

Single CCX is the better option due to the lower latency.

That's not true 

 

Just now, Islam Ghunym said:

that why I am asking if memory OC is vital over core clock here for game FPS?

 

Don't enable CCPC 

It will make you stutter and it won't be a nice experience 

Limiting your self to one ccx on that chip essentially gives you two cores and 4 threads 

 

[Vishera]

Just now, Islam Ghunym said:

that why I am asking if memory OC is vital over core clock here for game FPS?

core clock will benefit you more,but why don't you overclock both?

[Islam Ghunym]

Just now, TofuHaroto said:

That's not true 

 

Don't enable CCPC 

It will make you stutter and it won't be a nice experience 

Limiting your self to one ccx on that chip essentially gives you two cores and 4 threads 

 

this CPÚ has only CCX for the 4 cores I think. ccorrect me if I was wrong,

[Vishera]

Just now, TofuHaroto said:

That's not true 

I am talking about overall latency,not RAM latency.

[Haro]

Just now, Vishera said:

I am talking about overall latency,not RAM latency.

Yes latency I know there is little to know difference

 

Just now, Islam Ghunym said:

this CPÚ has only CCX for the 4 cores I think. ccorrect me if I was wrong,

Well zen 1 typically if I remember has equal core arrangements on the ccxs 

Limiting your self to one ccx will not benifit you interms of performance 

Latency won't matter 

But if you are dead set on one ccx 

A core clock is more important because obviously zen 1 FCLK will probably either handle a memory oc or a core clock 

[Islam Ghunym]

2 minutes ago, TofuHaroto said:

Yes latency I know there is little to know difference

 

Well zen 1 typically if I remember has equal core arrangements on the ccxs 

Limiting your self to one ccx will not benifit you interms of performance 

Latency won't matter 

But if you are dead set on one ccx 

A core clock is more important because obviously zen 1 FCLK will probably either handle a memory oc or a core clock 

I am not talking about limiting CPUs with multiple CCX to one CCX. that would be really stupid XD. I am talking about ones natively with one CCX only

[Haro]

Just now, Islam Ghunym said:

. I am talking about ones natively with CCX only

Ohh if you mean which zen cpu has one ccx 

That would be the 3300x 

[Vishera]

Just now, TofuHaroto said:

Yes latency I know there is little to know difference

The infinity fabric between CCXs adds latency,so with only one CCX that latency is removed and the difference is big:

 

[Islam Ghunym]

Just now, TofuHaroto said:

Ohh if you mean which zen cpu has one ccx 

That would be the 3300x 

so Ryzen 2000 and 1000 all comes with multiple CCX? I thought they are at a single CCX. well 3300x is a good example but that is a different arch Zen 2 unlike Zen and Zen+

[Haro]

Just now, Islam Ghunym said:

so Ryzen 2000 and 1000 all comes with multiple CCX? I thought they are at a single CCX. well 3300x is a good example but that is a different arch Zen 2 unlike Zen and Zen+

If I remember correctly it's one CCD 

The 3300x has one ccx and one CCD

[Islam Ghunym]

Just now, Vishera said:

The infinity fabric between CCXs adds latency,so with only one CCX that latency is removed and the difference is big:

 

so does faster memory speed here matter or if we go higher clocks we achieve better performance?

[Vishera]

Just now, Islam Ghunym said:

3300x

As far as i know it's the only CPU with a single CCX.

[Islam Ghunym]

Just now, Vishera said:

As far as i know it's the only CPU with a single CCX.

aha, but I already own a 3400G and it is single CCX and probably all Ryzen 2000  and 1000 series. anyway, should I crank memory up or core clock is preferred?

[Haro]

3 minutes ago, Vishera said:

The infinity fabric between CCXs adds latency,so with only one CCX that latency is removed and the difference is big:

Your technically correct I know 

Single ccx should decrease latency but from what I have seen it doesn't well it does but not in a way that you would expect

 

[Islam Ghunym]

 

16 minutes ago, Vishera said:

core clock will benefit you more,but why don't you overclock both?

that is something you should not really ask. either we push memory to limits or CPU to limits. OC both is not possible. one has to be faster at expense of the other 

[Haro]

1 minute ago, Islam Ghunym said:

 

that is something you should not really ask. either we push memory to limits or CPU to limits. OC both is not possible. one has to be faster at expense of the other 

That's because of the FCLK sadly 

[Vishera]

Just now, Islam Ghunym said:

so does faster memory speed here matter or if we go higher clocks we achieve better performance?

Faster memory with lower CAS will give better performance regardless,CAS is important for performance,but many people ignore it due to lack of knowledge.

Just now, Islam Ghunym said:

aha, but I already own a 3400G and it is single CCX and probably all Ryzen 2000  and 1000 series. anyway,

Just checked it and the G series is a single die without CCXs and chiplets.

Just now, Islam Ghunym said:

either we push memory to limits or CPU to limits. OC both is not possible. one has to be faster at expense of the other 

?!?!?!?!?

That's not how it works,you can overclock both and get a boost in performance greater than overclocking just one of them.

 

[Vishera]

Just now, TofuHaroto said:

That's because of the FCLK sadly 

Depends on the frequency of the RAM,the limit is around 3800MHz on the RAM.

[Haro]

Just now, Vishera said:

Depends on the clock speed,the limit is around 3800MHz on the RAM.

Depends on the core overclock

If you have a heavy overclock 

Overclocking ram will be alot harder

[Vishera]

Just now, TofuHaroto said:

Depends on the core overclock

If you have a heavy overclock 

Overclocking ram will be alot harder

That depends on the VRMs,SOC etc,but with 2 dimms or less it shouldn't be a problem.