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3930k ->7800X worth it?

Discussion in 'System Builder's Advice' started by BarbaricSoul, Sep 12, 2017.

  1. BarbaricSoul

    BarbaricSoul

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    Thinking about possibly upgrading my 3930K system to a 7800X system. System is mostly used for crunching with some minor gaming every now and then. My only concern is is it actually worth it? How much of a performance gain will the upgrade yield? The 3930k has served me very well, and still does what I ask of it, but is there enough of a performance increase between the 3930k and 8700X to justify the cost of the upgrade? The upgrade would cost about $1000 including a much needed and overdue SSD.

    https://pcpartpicker.com/list/GDRMsJ

    And before anyone suggests it, $600 for a 8720X is out of my budget.
     
    Last edited: Sep 12, 2017
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  2. JalleR

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    If you are looking at the Price performance gain I would wait till the release of the i7-8700(k) to make that diction
     
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  3. BarbaricSoul

    BarbaricSoul

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    with all due respect, I'm not asking about the 8700k. I'm asking about the 7800X.
     
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  4. Vayra86

    Vayra86

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    Well it is pre-Haswell so this does mean there is a chunk of IPC you're missing. At the same time you have several Intel gens AND TR available so for a HEDT upgrade the time seems quite right, price points have shifted a bit due to competition as well. Is it worth it.. only if you max out your current rig doing what you do. Performance is only useful if its usable :p A lot will depend on clocks, I reckon we're talking about a 20% IPC gap altogether, give or take.
     
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  5. BarbaricSoul

    BarbaricSoul

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    Crunching runs my CPU at it's maximum output. So yeah, I do use every bit of performance the CPU has to offer.

    [​IMG]
     
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  6. Vayra86

    Vayra86

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    If this is all-core 3.8 Ghz like it shows here (although with my rig that cpu clock never is correct, somehow I can run my ivy at 5.4 Ghz according to Win 10 :D) then there is a good bit of performance to be had, along with the IPC gap that'll amount to 35-50% if you put a decent OC on there.
     
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  7. BarbaricSoul

    BarbaricSoul

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    it's all cores running at 3.8 GHz. Can do more, but then my room starts to get too hot to sleep in.
     
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  8. EarthDog

    EarthDog

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  9. BarbaricSoul

    BarbaricSoul

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    plans for future upgrade involving buying a used 10-12 core
     
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  10. Outback Bronze

    Outback Bronze

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    I say go for it mate.

    The board alone will give you a few upgrades with M.2 etc.

    I would stretch for the 7820X for a more real feel of an upgrade up front but as you say, you can buy a used one down the track. So no qualms there.

    You got the itch? Scratch it :)
     
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  11. jagjitnatt

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    Not worth it.
    If you think that $600 is out of budget, and you're sleeping in the same room as the PC, it clearly is not justified to spend extra money on it.
    We're talking CPU + Memory (which is expensive right now) + Motherboard (also expensive) + SSD (might not be on the radar, but you will get an itch soon).

    That's too much ($800-$1000) for at best 20% extra performance
     
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  12. GorbazTheDragon

    GorbazTheDragon

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    When considering the 7800x in isolation, I would have given a big fat yes.

    If you can say based on your use case that X299>Z370 due to the PCIe/memory/etc...
    It's the most cores/price you can get on intel's stack, on par with the expected pricing of the 8700k.

    But, considering that you are only moving up from the 3930k, I would have to change that to a no. You'd be looking at a ~$600 investment for nothing more than a not very impressive performance jump and the extra expansion options (m.2+newer chipset). Maybe if you were eyeing the 8-core I would say yes in all cases, but 3930k=>7800x just looks like a mega expensive sidegrade.
     
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  13. Rehmanpa

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    Why had nobody brought up ryzen? His CPU will be using heavily multithreaded applications, so a ryzen 1700 with 4 more threads than the 7800x wou ld be quite benefiitial plus its tdp is 65w vs 140w on the 7800x and not to mention it's cheaper and the motherboards for it are cheaper too. I mean with the extra threads that would be a significant upgrade imo. He sleeps in the same room as the pc so the lower the cpu tdp the better.
     
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  14. Peter Lindgren New Member

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    I´m happy with my Xeon 2680v2 running 10 cores at 3,5Ghz. You could do the same if your motherboard supports Xeons. They cost about 200$ at Ebay.

    [​IMG]
     
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  15. ikeke

    ikeke

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  16. jaggerwild

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    My 3930k clocks past 5GHz, no reason to upgrade. I have a 6700k, i always go back to the 3930k. Use the 6700k for board testing
     
  17. BarbaricSoul

    BarbaricSoul

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    My 3930k isn't that good of a OC'er. Best I've gotten out of this particular chip is 4.5GHz. And since it runs at 100% load crunching whenever the system is powered up, anything past 3.8 GHz generates enough heat to actually start increasing the room temperature. I may go Ryzen just because of this.
     
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  18. EarthDog

    EarthDog

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    So you can crunch slower using a similar amount of power when overclocked at 4Ghz, its limit?
     
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  19. ikeke

    ikeke

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    IIRC then 3930k @ 4.5...5Ghz is right up there with OCd AMD FX8xxx and FX9xxx on the power consumption front (~300W+ on CPU)

    My R7 1700 @stock clocks and undervolted by 100mv is ~60W regular and 80W 100% AVX load. I dont see much value in pushing for silicon limit by dumping vcore into a chip, 3.5-3.6Ghz all core can be achieved by marginal overvolt or (Si-lottery permitting) at stock.

    https://forums.anandtech.com/threads/ryzen-strictly-technical.2500572/
     
  20. GorbazTheDragon

    GorbazTheDragon

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    The 8 core Ryzens also should be great, but again you are just looking at a pretty expensive sidegrade. $450 before RAM at least!!!
     
  21. thebluebumblebee

    thebluebumblebee

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    BTW, @Norton and @infrared are crunching with Ryzens. You can check out their results at FDC. Here's Norton01's 1600X
     
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  22. jaggerwild

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    These people get paid by AMD, or they have something to gain by consistantly shoving AMD up everyones azz?
     
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  23. ikeke

    ikeke

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    ..or perhaps it's just a good well-priced product?
     
  24. thebluebumblebee

    thebluebumblebee

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    Ryzen is a god send for crunchers. Many threads, fast and efficient.

    Edit: And I forgot AFFORDABLE.
     
    Last edited: Sep 21, 2017
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  25. Rehmanpa

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    Ryzen is objectively better than intel current line offer ups for HEDT.
    Lower power consumption, very similar ipc, way lower price (especially with mobos taken into consideration), plus did I mention it's cheaper? Problem with it on a gaming factor is that people often compare it to an i7 7700k with both using a 1080 ti. The fact of the matter is that they ought to compare the ryzen 1600 with a 1080 ti vs a 7700k with a 1080 because it's about the same price at that point.
    Tl;dr: quit hating on AMD for making a good product.
     
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