i7-6820HK vs i7-3840QM?

Discussion in 'Sager and Clevo' started by Aeyix, Aug 16, 2016.

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  1. Aeyix

    Aeyix Notebook Evangelist

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    So I love my P150EM but the 680M is clearly becoming dated. I couldn't run The Division on anything other than lowest settings and 900p to get occasional 60fps. Most of my games are fine but seeing benchmarks of the 1070 laptop just blow it away by 3x the performance it seems and would really benefit some of the games I currently play (like GTAV).

    My only worry is the CPU. I'm rocking a 3840QM that even though boasts a boost clock on all 4 cores up to 3.6GHz, I know rarely actually maintains it for long periods of time depending on actual CPU usage. Even when I had my previous mobo for this lappy before it died that had the Prema BIOS mod, overclocking the boost to 4.0GHz turned out to be mostly useless as it would throttle back to around 3.4-3.5 for extended times.

    I've had my eye on both the i7-6820HK (P650RS) and the i7-6700K (P750DM2). I'm more intrigued by the fact the P650RS is a significantly smaller chasis in thickness and weight than my current P150EM.

    The only thing is I'm not so sure on the i7-6820HK. How does that fair in the current previous sager models running the 9xx GPUs? Does it maintain its boost clocks well or overclocks, or does it throttle back like how I described my current CPU? I'm assuming since it is 3 generations down the road from what I currently use that its performance per 100MHz is better than my current CPU.
     
  2. Stooj

    Stooj Notebook Deity

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    The 6820HK, under stock settings, does quite well in the P650/P670 series and doesn't throttle AFAIK (in a cool-ish environment, obviously a hotter environment will be cutting it close).
    When clocked at 4.0ghz it gets VERY close to the desktop 6700 processor which is pretty good.

    Despite what you may read here, the 6700HQ and 6820HK are more than enough for gaming. The 6820HK at STOCK clocks is exactly as fast as my desktop i7-2600K which is clocked at 4.4ghz. I've yet to find any game that really stresses out the 2600K so I daresay you'll be fine.

    Either way, I'd be waiting on some more details about both. Specifically, we haven't got much info on what panels will be available on the P600 and whether they actually got a Thunderbolt3 controller added or not.
     
  3. Papusan

    Papusan JOKEBOOKs Sucks! Dont waste your $$$ on FILTHY

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    You talk a lot about clock up the BGA 6820 to 4.0 GHz. What with 6700K? You should compare Apples with apples :D And that BGA will be smoked!!:rolleyes:
     
    Last edited: Aug 17, 2016
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  4. Stooj

    Stooj Notebook Deity

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    OP is talking about games and gaming where it makes very little difference. Even at stock clocks, even the 6700HQ is fine.

    Anyone who actually needs multi-threaded performance would know that even the 6700K is weak as hell compared to Xeons. Cores > clocks in any multi-threaded task worth doing.

    For example, look at the Xeon D-1587. It's BGA, 16/32 cores/threads (yes, 16 freakin cores), 65W TDP, full SOC (chipset integrated) and absolutely destroys a 6700K. Almost 50% faster than a 4.8ghz 6700K and probably uses 3 times less power. It's also clocked at a "measly" 2.3ghz turbo doing so.

    http://www.servethehome.com/wp-content/uploads/2016/02/Intel-Xeon-D-1587-Benchmark-c-ray-600x421.png
    http://images.anandtech.com/graphs/graph9533/76986.png

    BGA is not the problem (despite what everyone likes to believe).
     
  5. i_pk_pjers_i

    i_pk_pjers_i Even the ppl who never frown eventually break down

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    That's where I disagree with you. It should be my choice if I want to upgrade/swap out my CPU, not up to manufacturers. It makes upgrading and replacing components so much easier.
     
  6. Stooj

    Stooj Notebook Deity

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    I'm talking on a purely technical level. It's a far superior chip implementation method in that regard, especially with upcoming node shrinks.

    One thing that I find odd, is that GPUs (desktop and MXM for that matter) have been BGA for decades now and we pay up to thousands of dollars for said GPUs and are significantly more likely to be upgraded. Some people upgrade every big GPU generation, some even within the same generation. Yet, a motherboard/cpu is out of the question?
     
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  7. Aeyix

    Aeyix Notebook Evangelist

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    Sorry for not being to the point in my op. To clarify, I'm asking mainly for a performance comparison between the 6820HK and my current 3840QM. Notebookcheck showed it performing better overall in benchmarks but I wanted other's opinions on it from their experiences. I know the clock speeds are higher in my current CPU at stock but the architecture is generations better in the 6820HK. My main concerns come across video recording/streaming and gaming. Since my CPU won't maintain boost clock for long periods of time (depending on usage), I was just curious on what overclocking the 6820HK in a P650 series looks like as well as its overall performance compared to my current CPU. As much as I would love to get the Desktop CPU laptops, the idea of finally getting a better performance laptop than what I own and something in a smaller chassis is intriguing.

    As for CPU heavy things I do. In the past, when I played The Division, I'm pretty sure I was CPU bottlenecked as I usually had 80% usage across all 8 threads but couldnt get decent performance out of the game (lowest settings possible, 25-35fps at 1080p and 40-60fps at 900p). I like to record games sometimes or stream with OBS and depending on what I'm doing, I can't do that. The main game I play though is SWTOR which is a horribly optimized crap game engine and CPU heavy where clock speed is more important than cores so it's very noticeable at times that my CPU is lacking. Especially when I want/try to record/stream something where FPS is more so hurt in that game by using OBS than any other.
     
  8. Stooj

    Stooj Notebook Deity

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    The Division is a weird one. It uses CPU for no reason, regardless of what CPU you actually have. Both my 2600K at home and my 6700K (P750DM) see very high usage. Yet my desktop with 980Ti gets much higher framerates than the P750DM (970M) as it should. More-over, the Division is pretty dead nowadays, the devs really dropped the ball on it (but that's a whole other can of worms).

    For actual overclocking, have a look at the NBC review of the P671RG here: http://www.notebookcheck.net/Schenker-XMG-P706-Clevo-P671RG-Notebook-Review.152011.0.html

    They run it at 4ghz in their CPU benchmarks. They don't even have to set a static voltage offset. It performs very similarly to the stock 6700K at that point.
    If you scroll down to the games where the CPU is back to stock clocks, it's much the same story as the 6700K equipped machine.
     
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