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Jaglover
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PostPosted: Thu Sep 14, 2017 1:43 am    Post subject: i7 7700K or not? Reply with quote

Playing with CPU upgrade idea. There are reports i7 7700K runs uncontrollably hot. They say it is nothing but 6700K overclocked by Intel. Maybe plain 7700 is the way to go? Anybody using these processors?
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Bones McCracker
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PostPosted: Thu Sep 14, 2017 1:57 am    Post subject: Reply with quote

Jess slap a watta coola onnat beach. Swut ah deed.
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Jaglover
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PostPosted: Thu Sep 14, 2017 2:05 am    Post subject: Reply with quote

Thanks. Will keep my current i3 3.7 GHz. It is snappy. But takes rather long time to encode an HD video.
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R0b0t1
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PostPosted: Thu Sep 14, 2017 4:00 am    Post subject: Reply with quote

i7-6700K performs well.
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Jaglover
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PostPosted: Thu Sep 14, 2017 5:12 am    Post subject: Reply with quote

I kind of gave up on this. My i3 encodes HD video ~10 FPS. Upgrade to 6700K would cost $300 and what do I get? A CPU that encodes same video 20-25 FPS. Not worth it.
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PostPosted: Thu Sep 14, 2017 6:18 pm    Post subject: Reply with quote

They don't run uncontrollably hot. But Intel does use shitty TIM between the die and heat spreader. It's only really a problem if you're planning an overclock that involves a voltage bump. Otherwise, even a basic heatsink like a hyper 212 will manage just fine.
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R0b0t1
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PostPosted: Thu Sep 14, 2017 8:52 pm    Post subject: Reply with quote

Jaglover wrote:
I kind of gave up on this. My i3 encodes HD video ~10 FPS. Upgrade to 6700K would cost $300 and what do I get? A CPU that encodes same video 20-25 FPS. Not worth it.
This is really a misuse of a CPU. Are you sure you are making a good comparison, though? Tom's Hardware quotes 20-25 FPS for 4k video encoding, which is a lot of data. Full HD may very well be 60 FPS. Follow along here.

If you are going to use Gentoo on it you will notice far faster compile times. However, if you do nothing else resource intensive you will likely not notice any other performance gains. This is one of the things that makes me sad about modern computers. Nice enough performance for interactive development is rather expensive, but actually using the produced software usually takes very little resources.

Do note that the i7-7700K has the Lord's number in it, and I think this makes it a very attractive option indeed. Perhaps wait for the i7-7770K?
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Jaglover
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PostPosted: Thu Sep 14, 2017 9:17 pm    Post subject: Reply with quote

aidanjt wrote:
They don't run uncontrollably hot. But Intel does use shitty TIM between the die and heat spreader. It's only really a problem if you're planning an overclock that involves a voltage bump. Otherwise, even a basic heatsink like a hyper 212 will manage just fine.

I read if you remove that shitty TIM and use better one you lose the warranty.

@R0b0t1

They do H.264 coding as benchmark. I use H.265.
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PostPosted: Fri Sep 15, 2017 12:25 am    Post subject: Reply with quote

Jaglover wrote:
They do H.264 coding as benchmark. I use H.265.
Can I see those benchmarks? H.265 was designed with parallelism in mind (potentially moreso than H.264) and I would naively expect a proportional increase in throughput with an increase in core count. Sadly, the x265 project states you only get a 30% to 50% speedup, but that is proportional to core count.

The practical estimated FPS throughput of encoding is then 10 FPS * ([.3 to .5] * (12/2)) = [~18 FPS - ~30FPS] ignoring better single threaded performance. So I suppose your evaluation makes sense if you want to be pessimistic. It would likely be better to use a GPU.
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PostPosted: Fri Sep 15, 2017 12:50 am    Post subject: Reply with quote

I'm not doing any benchmarks. I'm just sometimes encoding in H.265. The question was whether it is feasible to upgrade or not. Wife wants to buy me something for birthday. I hate birthdays, but it is better if I choose something I can use instead of something completely useless she may come up with in her own. They say nVidia hardware encoding is inferior quality. I have no first hand experience with that.
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bunder
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PostPosted: Fri Sep 15, 2017 8:15 am    Post subject: Reply with quote

I don't have a K, but I do have a HQ and two non-K's. They don't seem too particularly hot to me. I would say more or less the same as the past few generations.

edit: AFAIK, the only difference between non-K and K is the unlocked multiplier, they should be the same cores.
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PostPosted: Fri Sep 15, 2017 3:44 pm    Post subject: Reply with quote

7700 TDP - 65 W, base frequency 3.6 GHz
7700K TDP - 91 W, base frequency 4.2 GHz (without overclcoking)

I do not doubt they have same cores. I think I read somewhere how they mark CPUs. There are all the same CPU's coming down the same production line. The CPUs will be tested and marked accordingly. The max frequency, locked or not, all will be determined during the test. By the way, they do the same thing with microphones (for professional use). The price and model will depend on test results.
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Last edited by Jaglover on Fri Sep 15, 2017 4:52 pm; edited 1 time in total
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patrix_neo
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PostPosted: Fri Sep 15, 2017 4:51 pm    Post subject: Reply with quote

I have a 'wut' with a 'the' and a 'f' and a 'k'. I don't know, but I think it's an i7 of some sort...
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Jaglover
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PostPosted: Fri Sep 15, 2017 4:53 pm    Post subject: Reply with quote

Yes, I'm sure they make them in The Maledives.
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aidanjt
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PostPosted: Fri Sep 15, 2017 4:54 pm    Post subject: Reply with quote

Jaglover wrote:
I read if you remove that shitty TIM and use better one you lose the warranty.

That's true, but only necessary if you plan on blowing past 5GHz. Plant an NH-D15S or a 240-280mm radiator on top and you're good to go.
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Jaglover
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PostPosted: Fri Sep 15, 2017 5:04 pm    Post subject: Reply with quote

Thanks, I may order one after all. If it works and warranty is not required (I do not believe a CPU will die after working a few weeks, never happened to me) then I can replace the compound. I read reports the CPU temperature dropping as much as 15° C as a result.
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PostPosted: Fri Sep 15, 2017 5:11 pm    Post subject: Reply with quote

Me myself use a BeQuiet Black Rock cpu cooler. When compiling I drop the FQ a bit to spare it and it is silent as ever,
A bonus is my GPU cools down when the fan enters about the 1k. The CPU never enters above 65x1.8+32 F.
I have an i5 G6 with 4 cores.
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R0b0t1
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PostPosted: Fri Sep 15, 2017 11:48 pm    Post subject: Reply with quote

Sir, if your wife wishes to purchase computer parts for you, I would invite you to take her up on her offer. Every time you use your computer thenceforth you have a chance to be reminded of the devoted woman who loves you. If it truly seems like a waste of money then perhaps ask for a chance to spend time doing something with her.

The i7-7700[K] also has many sevens in it. Seven is a good number. Additionally, Intel is proud of their products, but they set and meet performance increase goals. I purchased an overclockable part in the hope it would be more stable. I can't meet the operating conditions of room temperature at all times.
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PostPosted: Fri Sep 15, 2017 11:55 pm    Post subject: Reply with quote

R0b0t1 wrote:
Sir, if your wife wishes to purchase computer parts for you, I would invite you to take her up on her offer. Every time you use your computer thenceforth you have a chance to be reminded of the devoted woman who loves you. If it truly seems like a waste of money then perhaps ask for a chance to spend time doing something with her.

+++++++
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Jaglover
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PostPosted: Wed Sep 27, 2017 11:00 pm    Post subject: Reply with quote

Thank you for helping me to decide. It arrived today. Freakin cooler is too big, can't close the case. But it works. Encoding H.265 3.1x faster than my i3. Idle power draw of my box is now 34 W instead of 28 W. Not too bad.
Anyone wants an i3-6100 3.7 GHz?
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Bones McCracker
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PostPosted: Wed Sep 27, 2017 11:46 pm    Post subject: Reply with quote

I told you to get a water cooler.
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Jaglover
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PostPosted: Thu Sep 28, 2017 12:04 am    Post subject: Reply with quote

Water coolers have poor reliability record.
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Bones McCracker
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PostPosted: Sun Oct 01, 2017 12:01 am    Post subject: Reply with quote

Nonsense.

Idiots have a poor reliability record.

Poorly cooled high-end processors have a poor reliability record.
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Jaglover
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PostPosted: Sun Oct 01, 2017 12:40 am    Post subject: Reply with quote

More moving parts > less reliability.
Idiots are extremely reliable of what they are doing.
High-end processors have built-in protection against overheating.

:P
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Bones McCracker
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PostPosted: Mon Oct 02, 2017 11:25 pm    Post subject: Reply with quote

Jaglover wrote:
More moving parts > less reliability.
Idiots are extremely reliable of what they are doing.
High-end processors have built-in protection against overheating.

:P

Poorly cooled high-end processor with built-in protection against overheating == slow-ass paperweight
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