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Intel Core I7-11700K Review: Blasting Off with Rocket Lake

anandtech.com

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Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#11

Post by [deleted] »

nullifidian wrote: post #8
guardiangod wrote: post #5

i7-10700K to the i7-11700K Single thread floating point: +19.0% Multi-thread floating point: +19.5% Single thread integer: +13.0% Multi-thread integer: +7.3% Jesus. Just overclocking the RAM for the 10700k would give a similar performance increase. Along with 291W, this 10nm->14nm backport is not working out well for Intel. PS My work desktop died on Wednesday afternoon during the SpaceX SN10 flight. I rushed to my l…

Is it a backport? I read somewhere that it's a continuation of Skylake evolution and not a new architecture.

[deleted]

Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#13

Post by guardiangod »

nullifidian wrote: post #8
guardiangod wrote: post #5

i7-10700K to the i7-11700K Single thread floating point: +19.0% Multi-thread floating point: +19.5% Single thread integer: +13.0% Multi-thread integer: +7.3% Jesus. Just overclocking the RAM for the 10700k would give a similar performance increase. Along with 291W, this 10nm->14nm backport is not working out well for Intel. PS My work desktop died on Wednesday afternoon during the SpaceX SN10 flight. I rushed to my l…

Is it a backport? I read somewhere that it's a continuation of Skylake evolution and not a new architecture.

Rocket Lake was designed for 10nm, but Intel couldn't get 10nm to work, so they backport Rocket Lake to 14nm.

https://semiaccurate.com/2020/10/29/intels-palpable-desperat...

Just filter out Charlie Demerjian's grudge against Intel.

Companies don’t backport because a core is designed for a process. It’s efficiency and architecture is based on the transistors that it will use from the design start, caches are sized based on the process too, and a lot of the architectural gains are due to the added transistor counts. If you backport a CPU you lose the efficiency of these new transistors so the energy use goes up and the clocks likely go down as well. Cores take up 2x the size, or at least a lot more than the older core did on the older process, so costs go up too. You can either cut out bits of the core and lose performance or eat it on area and therefor cost. Backporting a design not made for portability isn’t a lose/lose proposition, it is a lose/lose/lose/lose proposition. But Intel is desperate so…

Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#14

Post by rbanffy »

hnuser123456 wrote: post #4
giuliomagnifico wrote: post #2

291W... whoa!

Good thing nobody actually uses AVX512

Interestingly enough, the AVX512 test was the easy win for Intel.

Nobody uses it because it wasn't available and, when available, wasn't much faster overall. Now it is.

Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#15

Post by jonplackett »

> In order to bring its best single core performance to the desktop market, Intel had to redesign its 10nm product on 14nm, which combines the high throughput of the design with the high frequency of 14nm

Is that just because they couldn't do it at 10nm? I thought the whole point of die shrinking was to get higher frequency, lower heat etc?

Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#16

Post by rektide »

I'm just flabbergasted that Intel has Thunderbolt support integrated into it's mobile chips, but on desktop it's business as usual, left to motherboard vendors to implement Thunderbolt themselves with the normal slew of add-on chips.

Super frustrating that desktop users can't expect modern connectivity. It should be on the chip, like mobile. Notably, one can take any old TB4 cable, connect two modern Intel laptops, and get a 40Gbps networking connection between them. Alas, only a couple rare desktops will be able to participate & do this, because for whatever reason this on-chip capability that Intel has was omitted on desktop. I was so excited to be entering an era of enhanced connectivity!! Not yet, I guess.

Re: Intel Core I7-11700K Review: Blasting Off with Rocket Lake

#19

Post by 37ef_ced3 »

hnuser123456 wrote: post #4
giuliomagnifico wrote: post #2

291W... whoa!

Good thing nobody actually uses AVX512

AVX-512 software is appearing. For example, for neural net inference: https://NN-512.com

AVX-512 is a pleasure from the programmer's perspective, much nicer than writing software for GPUs or for earlier SIMD instruction sets like AVX2/SSE

Versus a GPU, the AVX-512 machine model is just much simpler, and there are no drivers or proprietary compilers

Versus earlier SIMD instruction sets, AVX-512 provides all the instructions you want (permutations, floating point conversions, etc.) and they're all masked so edge cases are easy. AVX-512 Foundation is a really nice instruction set and it has a bright future

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