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I need educating on processors

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dbt1949
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I need educating on processors

Post by dbt1949 » Fri Dec 28, 2018 1:47 pm

I'm thinking of a new PC. I know how much ram I want and video cards but the different processors confuse me.
I see anywhere from 1.8 to 3.8+GHZ. I7 and I5. And of course AMD.
Is 1.8 half of 3.6? I figure there's more to it than that.

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Isgrimnur
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Re: I need educating on processors

Post by Isgrimnur » Fri Dec 28, 2018 1:54 pm

Silver - 3k

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Kasey Chang
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Re: I need educating on processors

Post by Kasey Chang » Sat Dec 29, 2018 10:08 am

Super short version:

Intel side:

Core series, as you know, have i3, i5, i7, and now, i9 series. They are now on 9th gen, ex: i7-9700.

Suffix K = overclock capable (unlocked clock) Suffix F = no onboard "Intel" graphics in the CPU (it's in the CPU rather than the mainboard chipset now) Suffix X = server (I think, more cores)

Core series CPUs have a "normal speed" and "boost speed". Boost speed automatically engages when needed. And MOST Core CPUs have hyperthreading (but not all) which means each actual core can execute 2 threads.

i7-9700K = 9th gen i7, 8 core, no hyperthreading, 3.6GHz base, 4.9GHz boost.

i7-8700K = 8th gen i7, 8 core, hyperthreading, 3.7 base, 4.7 boost

For gaming, *most* games cannot use more than 2 cores, so having more cores doesn't always help. Obviously new game engines will use more CPUs, but most tend to stress the GPU than the CPU.

Don't know much about the AMD side.
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Re: I need educating on processors

Post by Zenn7 » Sat Dec 29, 2018 11:57 am

Kasey Chang wrote:
Sat Dec 29, 2018 10:08 am
i7-9700K = 9th gen i7, 8 core, no hyperthreading, 3.6GHz base, 4.9GHz boost.

i7-8700K = 8th gen i7, 8 core, hyperthreading, 3.7 base, 4.7 boost
Based on that, the 9th gen is not as good as the 8th gen?

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Re: I need educating on processors

Post by Blackhawk » Sat Dec 29, 2018 11:58 am

Gah, why do they have to put it all in code?
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Kasey Chang
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Re: I need educating on processors

Post by Kasey Chang » Sun Dec 30, 2018 1:30 am

Zenn7 wrote:
Sat Dec 29, 2018 11:57 am
Kasey Chang wrote:
Sat Dec 29, 2018 10:08 am
i7-9700K = 9th gen i7, 8 core, no hyperthreading, 3.6GHz base, 4.9GHz boost.

i7-8700K = 8th gen i7, 8 core, hyperthreading, 3.7 base, 4.7 boost
Based on that, the 9th gen is not as good as the 8th gen?
According to Userbench, 9th gen is actually 10% faster in benchmarks than 8th gen
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Biyobi
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Re: I need educating on processors

Post by Biyobi » Fri Jan 04, 2019 10:24 am

Zenn7 wrote:
Sat Dec 29, 2018 11:57 am
Kasey Chang wrote:
Sat Dec 29, 2018 10:08 am
i7-9700K = 9th gen i7, 8 core, no hyperthreading, 3.6GHz base, 4.9GHz boost.

i7-8700K = 8th gen i7, 8 core, hyperthreading, 3.7 base, 4.7 boost
Based on that, the 9th gen is not as good as the 8th gen?
The 8700k actually only has 6 cores plus hyperthreading. From the tests I’ve seen on Gamers Nexus, the 9700k has better gaming performance (the two extra physical cores plus architecture upgrades beat the 6 virtual cores provided by hyperthreading).

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Victoria Raverna
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Re: I need educating on processors

Post by Victoria Raverna » Sat Jan 12, 2019 9:11 pm

Also not having or disabling hyper threading is probably a good idea if you worry about security.

Seem like they keep coming up of security flaw of hyper threading.

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Re: I need educating on processors

Post by gameoverman » Wed Jan 16, 2019 10:30 pm

I'd approach this the opposite way. Instead of focusing on the CPUs, focus on what software/games you expect to run. Some things, like video editing, will use many cores and threads if you have them. Some games, like large multiplayer Battlefield games, will use more than 4 cores and threads if you have them.

Both Intel and AMD still sell new dual core CPUs. In the event that you don't anticipate running anything especially demanding, going with a dual core 4 thread CPU might allow you to budget more for something like an SSD or more ram, which might result in better overall performance.

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