power efficient CPU for gaming

[RobFRaschke]

Just now, Islam Ghunym said:

you mean that hyperthreading will give more performance by raising required clock, so it won't change efficiency by itslef?

HyperThreading allows more instructions per clock by flooding the instruction queue with extra data, keeping it full, which is why it appears as additional cores in software. That extra load from the queued instructions increases power requirement, but not necessarily decreases "efficiency."

[Jurrunio]

1 minute ago, Islam Ghunym said:

you mean that hyperthreading will give more performance by raising required clock, so it won't change efficiency by itslef?

effect of hyperthreading is closer to adding cores rather than raising clock.

[Islam Ghunym]

1 minute ago, RobFRaschke said:

There is some conjecture that T series are cherry picked just like K series are, but with little physical evidence that I've seen.

 

Higher baseclock requires more power, but is not necessarily less efficient. There are two means of measuring efficiency. Instructions per clock and performance per watt. Performance per watt is similar in function to performance per dollar. More in depth reviews like those I've seen an AnandTech assess Performance per watt.

can you pls gimme a link i can refer to, AMD also announced that their upcomming ryzen chips will have 15% better IPC than intel, will this mean they will be more efficient

[Islam Ghunym]

Just now, Jurrunio said:

effect of hyperthreading is closer to adding cores rather than raising clock.

so for example 6 cores 12 threads is as efficient as 8 cores 8 thread?

[Jurrunio]

2 minutes ago, Islam Ghunym said:

so for example 6 cores 12 threads is as efficient as 8 cores 8 thread?

in the case of 9700k and 8700k at matching frequency and voltage, yes. In other cases it might change

 

just keep in mind that regardless of core count and thread count, getting the same performance out from the same frequency and voltage leads to same level of power draw.

[RobFRaschke]

Just now, Islam Ghunym said:

can you pls gimme a link i can refer to, AMD also announced that their upcomming ryzen chips will have 15% better IPC than intel, will this mean they will be more efficient

A link to conjecture about cherry picking of T series and K series, not a specific one off hand.

 

I believe they said they +15% IPC over Zen+, not Intel. And they will be more efficient per core, but an IPC increase doesn't guarantee better efficiency on it's own. An IPC increase at the same wattage would be an efficiency increase. A die shrink and an IPC increase together will definitely increase efficiency. Efficiency requires Insructions/Performance per watt, which is a measure over time.

[Islam Ghunym]

4 minutes ago, RobFRaschke said:

HyperThreading allows more instructions per clock by flooding the instruction queue with extra data, keeping it full, which is why it appears as additional cores in software. That extra load from the queued instructions increases power requirement, but not necessarily decreases "efficiency."

so we don't know if it will decrease efficiency also...

[Islam Ghunym]

2 minutes ago, RobFRaschke said:

A link to conjecture about cherry picking of T series and K series, not a specific one off hand.

 

I believe they said they +15% IPC over Zen+, not Intel. And they will be more efficient per core, but an IPC increase doesn't guarantee better efficiency on it's own. An IPC increase at the same wattage would be an efficiency increase. A die shrink and an IPC increase together will definitely increase efficiency. Efficiency requires Insructions/Performance per watt, which is a measure over time.

why I cant find infos about CPUs effficiency anywhere, is that because customers usually never care about that?

[RobFRaschke]

1 minute ago, Islam Ghunym said:

so we don't know if it will decrease efficiency also...

It's just not that simple. You're looking for a simple answer to a very complex question.

[Islam Ghunym]

2 minutes ago, RobFRaschke said:

It's just not that simple. You're looking for a simple answer to a very complex question.

but they can simply measure watts used and.... and try gaming benchmarks then take average and... XD it seems long a bit

[RobFRaschke]

2 minutes ago, Islam Ghunym said:

why I cant find infos about CPUs effficiency anywhere, is that because customers usually never care about that?

Many of us do care about it, but it's difficult to measure effectively, and when it is measured, it's usually under an artifical load. Basically every AnandTech CPU review has a page dedicated to power useage with a chart that will look like this:

 

The problem is, that this is under a specific, artificial full load, and not indicative of real world performance.

[Islam Ghunym]

6 minutes ago, RobFRaschke said:

Many of us do care about it, but it's difficult to measure effectively, and when it is measured, it's usually under an artifical load. Basically every AnandTech CPU review has a page dedicated to power useage with a chart that will look like this:

 

The problem is, that this is under a specific, artificial full load, and not indicative of real world performance.

btw, is ryzen 5 2400G uses only 27W,that is mroe efficient than my intel shit one, I have gone for intel because i thought they will give me better power value, seems not! mm but boost clock is not considered here, seems really hard to get a good answer for this thx for help.

[Islam Ghunym]

in conclusion, all coffelake should have the same efficiency and by going for k processors I can get the best power value i want from any CPU of them, however zen 2 will be more efficient, cheaper and any zen2 cpu will be unlocked, so the final answer for me is to wait upcoming ryzen 3000 series, am I true here?

 

[Stormseeker9]

1 hour ago, Islam Ghunym said:

dk but as rumored they are 7 nm power hungry chips. 

Uh, not really. 

[Islam Ghunym]

1 minute ago, Stormseeker9 said:

Uh, not really. 

I was wrong probably, having bad english with hard time to understand things proberly, thx

[Stormseeker9]

2 minutes ago, Islam Ghunym said:

I was wrong probably, having bad english with hard time to understand things proberly, thx

Quote

The AMD chip also consumed considerably less power—around 26 percent less, peaking at just over 133W versus the Core i9-9900K bumping up against 180W.

 

"Now you really see the power of 7nm technology and what being aggressive with technology does," Dr. Su noted.

 

 

[Islam Ghunym]

1 hour ago, _Syn_ said:

I would also recommend the i5-9400F if you have a discrete GPU, shouldn't consume more than 60W,

from what I found there should be no difference because  IGP should turn off completely when it is not being used

[.Apex.]

7 hours ago, Islam Ghunym said:

from what I found there should be no difference because  IGP should turn off completely when it is not being used

Yes that's true, it's just that the 9400F is more widely available and cheaper that's why i chose it, it's 155$ on Amazon, but be aware that you need to update your BIOS before you install it if you wanna go that route

[.Apex.]

2 minutes ago, _Syn_ said:

Yes that's true, it's just that the 9400F is more widely available and cheaper that's why i chose it, it's 155$ on Amazon, but be aware that you need to update your BIOS before you install it if you wanna go that route

But the 9400F is not a worthy upgrade, so I would really suggest waiting for Ryzen 3000 and see what it offers

[Quadriplegic]

Here's wild suggestion – why not get Ryzen 5 APU and ditch dedicated graphics card? 
I am not sure how good 1060 is when it is undervolted to reach 60W, going with APU would allow you lower power consumption

[Stefan Payne]

13 hours ago, Stormseeker9 said:

 

 

...and that is also rumored to be on an X570 Plattform, wich might consume a bit more.

Some people assume that the CPU itself might actually be around  half the Intel. Wich is possible s the other components are the same and the MoBo might not be the most efficient one...

[Stefan Payne]

6 hours ago, _Syn_ said:

But the 9400F is not a worthy upgrade, so I would really suggest waiting for Ryzen 3000 and see what it offers

Yeah, totally agree. And also Picasso, if the APU is an option.

[Islam Ghunym]

On 5/18/2019 at 4:15 PM, Quadriplegic said:

Here's wild suggestion – why not get Ryzen 5 APU and ditch dedicated graphics card? 
I am not sure how good 1060 is when it is undervolted to reach 60W, going with APU would allow you lower power consumption

well, my current sample is making impressive results at 60W only, it can do 3/4 stock performance at furmark and usualy gives 70-90% of stock performance on games running at 1400 Mhz booting to 1635 MHz a I monitored and with it's GDDR5.... the APU can in no way get a similar performance, however the NAVI 20 will be integrated in a 95W TDP Ryzen 5 3600G which may give an idea about being power hungry since even the Ryzen 5 3600X is expected to be with lower thermal design and of course I will have to overclock the IGP to get an acceptable performance which will make it less efficient, however all these are just rumors, but I see it will be nearly true.