Intel Atom x7-z8700 better than i5 5250u? wut.

[NotTayyeb]

Ok so the intel Atom lines always confused me a bit...

 

Take the intel atom x7-z8700 for example- its a 1.6ghz/2.4ghz boost 4 core cpu with an RCP of $37... In the same generation as that, theres the i5 5250U which runs at 1.6ghz/2.7ghz boost and has only 2 physical cores (though hyperthreaded), but a RCP of $315!? Looking on intel ARK, all i can see as a noteable difference is the atom has a really low TDP compared to the i5, and 1mb less cache, and a slightly lower boost clock..... so whys it so cheap compared to the i5? What am i not seeing?

 

 

http://ark.intel.com/products/85475/Intel-Atom-x7-Z8700-Processor-2M-Cache-up-to-2_40-GHz

http://ark.intel.com/products/84984/Intel-Core-i5-5250U-Processor-3M-Cache-up-to-2_70-GHz

[TheGhzGuy]

3 minutes ago, NotTayyeb said:

Ok so the intel Atom lines always confused me a bit...

 

Take the intel atom x7-z8700 for example- its a 1.6ghz/2.4ghz boost 4 core cpu with an RCP of $37... In the same generation as that, theres the i5 5250U which runs at 1.6ghz/2.7ghz boost and has only 2 physical cores (though hyperthreaded), but a RCP of $315!? Looking on intel ARK, all i can see as a noteable difference is the atom has a really low TDP compared to the i5, and 1mb less cache, and a slightly lower boost clock..... so whys it so cheap compared to the i5? What am i not seeing?

 

 

http://ark.intel.com/products/85475/Intel-Atom-x7-Z8700-Processor-2M-Cache-up-to-2_40-GHz

http://ark.intel.com/products/84984/Intel-Core-i5-5250U-Processor-3M-Cache-up-to-2_70-GHz

 

Look at the Passmark scores. Atom: 1923    i5: 3602

[WkdPaul]

IPC (instructions per clock) aren't comparable. The Atom is MUCH much slower.

 

Those are synthetic bench, but it still give you a rough idea of the difference between the 2;

 

http://cpu.userbenchmark.com/Compare/Intel-Atom-x7-Z8700-vs-Intel-Core-i5-5250U/m27122vsm24945

 

http://www.cpubenchmark.net/compare.php?cmp[]=2478&cmp[]=2506

[NotTayyeb]

Just now, TheGhzGuy said:

Look at the Passmark scores. Atom: 1923    i5: 3602

But why? i mean I would take the i5 over the atom, but im confused where the i5 pulls the performance our of... how much can 1mb cache and 300mhz boost really be doing? lol

 

 

[TheGhzGuy]

Just now, wkdpaul said:

IPC (instructions per clock) aren't comparable. The Atom is MUCH much slower.

 

Those are synthetic bench, but it still give you a rough idea of the difference between the 2;

 

http://cpu.userbenchmark.com/Compare/Intel-Atom-x7-Z8700-vs-Intel-Core-i5-5250U/m27122vsm24945

 

http://www.cpubenchmark.net/compare.php?cmp[]=2478&cmp[]=2506

 

Yeah, Passmark isn't the best, thanks for the Usermark stuff

[Electronics Wizardy]

5 minutes ago, NotTayyeb said:

But why? i mean I would take the i5 over the atom, but im confused where the i5 pulls the performance our of... how much can 1mb cache and 300mhz boost really be doing? lol

 

 

the cpu arch is very different. The i5 is much more advanced and faster. There is much more than a bit more cache.

[WkdPaul]

6 minutes ago, NotTayyeb said:

But why? i mean I would take the i5 over the atom, but im confused where the i5 pulls the performance our of... how much can 1mb cache and 300mhz boost really be doing? lol

Not sure about the accuracy of this Wiki article but it will explain why Ghz speed isn't what make the raw speed of a CPU, not every Ghz is worth the same

 

https://en.wikipedia.org/wiki/Instructions_per_cycle

[NotTayyeb]

1 minute ago, wkdpaul said:

Not sure about the accuracy of this Wiki article but it will explain why speed isn't what make the speed of a CPU, not every Ghz is worth the same

 

https://en.wikipedia.org/wiki/Instructions_per_cycle

Ah, awesome, thanks... I knew all Ghz arent equal like comparing amd fx to current intel and yada yada.....

 

I was just a lil conufsed how the ARK pages for the two CPUs didnt show a huge difference, what with both CPUs being of the same 14nm process, and released around the same time..