They did say it was an unadulterated chip (they seemed like they really wanted to be honest about these tests instead of trying to tarnish their name by pulling some test cheats like the entire car industry) so if it did not run at the max turbo it probably at least did go up a few steps to 3.4-3.6GHz. If it was running at the base clock it has to be in the P1 state at the very least so Speed Shift probably took some state between P0 and P1 if not P0 itself. I don't see why it shouldn't run at P0 since the whole selling point of Speed Shift was the ability to switch really quickly between states to have a more responsive system.
Turbo boost is linked to the temp sensor for throttling (as we see on the mobile parts a lot of the time). I think AMD is trying to differentiate Turbo from SenseMI because Turbo is only meant to be a short-term boost; generally Intel chips from what I've seen don't run at turbo all the time because it can introduce a lot of clock-based errors (WHEA_UNCORRECTABLE_ERROR which happens really often on my laptop even though it doesn't even run at max turbo) just from flip-flops or clock-gated logic not working fast enough all the time. Anyways SenseMI seems less like a Turbo and more like an automatic OC.
I think in the end it'll function just like Turbo though. They are adding speedstepping so it's not like the chip will run at those turbo frequencies all the time. There's no reason for it to when it can just drop to a lower state.
Quicksync since Skylake is full on dedicated logic for H264 encoding/decoding so there's no shortcuts there. I think Broadwell was like a more general solution for several different types of video codecs (Anand said that Broadwell was meant to be more flexible, Skylake more specific to H264 so kind of like FPGA/reprogrammable vs dedicated codec specific logic). But QuickSync on Skylake and onward shouldn't have as many (or if any) quality problems. I haven't seen any tests regarding that for Skylake and Kaby but if there still is quality loss issues let me know.
No, I think in the video it was shown that the 6900k could not turbo past its base clock, encoding is a power hog. The whole concept of turbo is to increase frequencies during lower loads, so it makes perfect sense that a chip cannot turbo under full stress. They might have mentioned that Ryzen did not turbo either because it was still being tweaked, but even then, we don't expect it to perform past base frequencies for encoding.
To be fair, I don't expect a 8C/16T chip to be able to turbo that high anyway, and perhaps it's not toooo important going forward as more and more games become multithreaded, we're still very GPU bound and will be for a long long time, maybe even forever.
For mobile chips I think its a bit more confusing because it's not 'turbo' that gets us the extra boost in clock speed for sustained loads, it's actually the configurable TDP function. The i5-6300U I have will happily play at 2.9GHz all day long with a base clock of 2.4GHz (going from memory here), but I don't think it's correct to say that it's being "turbo boosted" to 2.9GHz, it is instead just able to sip that sweet sweet 25W PL2 limit indefinitely barring thermal throttling and such compared to the 15W PL1 limit. It will turbo boost to 3.0GHz in single core loads.
And I do think it's the configurable TDP function that throttles a chip on a steaming hot ultrabook, it is aware of the temperature but I don't think the turbo boost function is.
edit: nvm I'm dum, it seems like the 6900k can all core boost to 3.5GHz.
This is getting real confusing ahahahahah.
All hardware accelerated encoding lowers quality compared to CPU only encoding, so it is a compromise of performance vs quality. You don't see anyone serious using a Skylake chip's Quick Sync for video encoding, they usually rely on the much larger GPU encoding engines to deliver higher performance without sacrificing too much quality. It does seem that in all of the damn Quick Sync info slides and stuff, it's meant for "casuals" converting videos for their phones and such, Quick Sync is basically useless for professional applications. That's probably why it seems like no reviewer really talks about Quick Sync past a Handbrake benchmark or two. Skylake only added some extra bit depth and h265/HEVC encoding/decoding support.
Yeah it does seem like some sort of auto-OC, good for the peasants I guess.