[HELP] CPU choice for encoding

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colem
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[HELP] CPU choice for encoding

Post by colem »

Good evening

I'm making a machine specially for dual-processor encoding.
What should I focus on in terms of CPUs, frequency or number of cores

I saw three different CPUs:

E5-4627V3 -> 10 cores, 2.6ghz, 3.2 turbo
E5-2640V3 -> 8 cores, 2.6ghz, 3.4 turbo
E5-2637V3 -> 4 cores, 3.5ghz, 3.7 turbo

for you which should I privilege.

thank you
colem
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Rodeo
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Re: [HELP] CPU choice for encoding

Post by Rodeo »

Depends if you want to run multiple parallel encodes or not, and which video encoder you'll be using (x264, x265, another)?
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

only one encoding at a time.
For the most part, I use x265
mduell
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Re: [HELP] CPU choice for encoding

Post by mduell »

What resolution encodes are typical for you?
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

1920x1080
mduell
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Re: [HELP] CPU choice for encoding

Post by mduell »

Are the CPUs all the same price? If not, what are the prices?
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

all around 50 €
mduell
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Re: [HELP] CPU choice for encoding

Post by mduell »

You can certainly make use of more than 8 cores, so I'd go with at least the 2640V3. You could do the 4627V3 but with diminishing returns it will be less than 20% faster.
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s55
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Re: [HELP] CPU choice for encoding

Post by s55 »

The 10 core seems to lack hyperthreading. Difficult to say for sure which will be faster but I'd wager not an awful lot in it.
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

well seen.
I did not see
I just found this one, slightly more expensive
E5-2660V3 -> 10 cores 20 threads 2.6ghz 3.30 turbo

should the number of cores be preferred over the frequency?
mduell
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Re: [HELP] CPU choice for encoding

Post by mduell »

Yes that's better than the 4627v3. Either the 2660v3 or 2640v3 is your best choice, not much difference between them.
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

mduell wrote: Thu Nov 19, 2020 8:31 pm Yes that's better than the 4627v3. Either the 2660v3 or 2640v3 is your best choice, not much difference between them.
2 cores and 4 more threads, right?
mduell
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Re: [HELP] CPU choice for encoding

Post by mduell »

Yes, if they're the same price you may as well get the 2660v3.
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

ok thanks all
8Ringer
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Re: [HELP] CPU choice for encoding

Post by 8Ringer »

I have a dual E5-2637 v3 (4-core 3.5ghz) box and I'm seeing roughly 60-80% utilization (varies a bit based on screen complexity) on a single h265 encode. I have HT turned off because it really didn't affect encode speed but having more threads can negatively affect the overall quality. I previously had two E5-2620 v3 (6-core 2.4ghz) installed and the utilization was such that I felt it made more sense to "upgrade" to fewer, faster cores as I don't often run multiple encodes, at least not when encode speed really matters.

Are you planning on running a two socket system with 2660s? I doubt Handbrake is going to be able to leverage all those cores...
8Ringer
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Re: [HELP] CPU choice for encoding

Post by 8Ringer »

^^ Quick correction since I can't find the edit button, but I actually DO have HT turned on, not off. My mistake.
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

hi

yes dual xeon
rollin_eng
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Re: [HELP] CPU choice for encoding

Post by rollin_eng »

Unless you’re a professional you’re not really going to need a multi socket system.

Of course it’s a personal choice.
colem
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Re: [HELP] CPU choice for encoding

Post by colem »

rollin_eng wrote: Wed Nov 25, 2020 7:45 pm Unless you’re a professional you’re not really going to need a multi socket system.

Of course it’s a personal choice.
I have almost only that: D
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