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Thread: 3-way crossfire with LGA 1155

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    Default 3-way crossfire with LGA 1155

    Hi!

    I'm planning on going for the the ASUS Sabertooth Z77 with the i7 3770 (not the 'K' version).

    I want to use 3 7970 Lightnings in crossfire with this setup. It is to my understanding that LGA 1155s do not provide more than 16 lanes of PCIE 3.0.

    So basically my question is - can I use 3-way 7970 Lightning crossfire setup with the above mentioned components and ensure that the cards will be used to their full potential?

    Correct me if I;m wrong, but tests suggest that the difference in performance between x8 and x16 slots is negligible. And I'm happy if I can run them at x8,x8,x4 setup.

    If some other motherboard can fix this issue (please mention brand and model), I;m okay with getting that one instead of the Sabertooth. I just want to stick to this CPU is all.


    Thanks a lot!

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    No bro seriously 3-way cfx apnar i7 diaw bottlenecked hobe if not oc'd.tasara amd'r cardgula nvidiargular cheye multi card setup e oto valo scale korena

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    for full potential, you'll need extremely good PSU + a motherboard like ASUS p8Z77 V delux.
    The abuse of greatness is when it disjoins remorse from power.
    Please do not PM me for support. You will NOT get a reply. Post in the relevant forum section.

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    Quote Originally Posted by CvP View Post
    for full potential, you'll need extremely good PSU + a motherboard like ASUS p8Z77 V delux. Asus Rampage X79 LGA2011
    Fixed.

    For 3-way Crossfire/SLI you are better off with the LGA2011 platform. SB/Ivy only provides 16lanes, which in turn becomes 8/8 when you utilize dual GPU. The extra bandwidth from the 2011 processors should keep those 7970s happy, and untap the full potential of your cards. Boards such as the Deluxe which CvP mentioned only solves this problem with an additional PLX chip, even though it's better than having less lanes, it creates an additional latency which might be a problem/might not.

    You will also need to clock that Ivy Bridge, if that's what you are aiming to a good 4.5-4.8GHz+ for three cards, and it's not quite feasible due to temperature problems.
    Last edited by dipanzan; June 24th, 2012 at 00:47.

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    ^ you will need a set of good monitor as well. typical 24" wont do justice. you will need at least 3 24" and if you can manage 6, it is heaven!!!!

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    Thanks for the reply everyone!

    Quote Originally Posted by CvP View Post
    for full potential, you'll need extremely good PSU + a motherboard like ASUS p8Z77 V delux.
    Would the EVGA Z77 FTW suffice for a 3-way crossfire (just to keep the option open, because I think I'll drop one card and just go for two 7970s)? And I understand the need for a good PSU. What reputed brands other than Thermaltake are available in Dhaka? I've read that Thermaltake does not use quality components.

    - - - Updated - - -

    Quote Originally Posted by dipanzan View Post
    Fixed.

    For 3-way Crossfire/SLI you are better off with the LGA2011 platform. SB/Ivy only provides 16lanes, which in turn becomes 8/8 when you utilize dual GPU. The extra bandwidth from the 2011 processors should keep those 7970s happy, and untap the full potential of your cards. Boards such as the Deluxe which CvP mentioned only solves this problem with an additional PLX chip, even though it's better than having less lanes, it creates an additional latency which might be a problem/might not.

    You will also need to clock that Ivy Bridge, if that's what you are aiming to a good 4.5-4.8GHz+ for three cards, and it's not quite feasible due to temperature problems.
    According to articles on the internet, benchmarks have shown very negligible differences between x8 and x16 lanes. Although I don't know how realistic these benchmarks are.

    I wasnt planning on overclocking right away. Maybe a year later, when its actually necessary. Would a Corsair H80 be enough to hit 4.5-4.8 GHz?

    - - - Updated - - -

    Quote Originally Posted by codename5302 View Post
    ^ you will need a set of good monitor as well. typical 24" wont do justice. you will need at least 3 24" and if you can manage 6, it is heaven!!!!
    I'm not planning for eyefinity. I'll be happy if this setup can provide 60+ FPS with all eye candy enabled at 2560x1440 for at least 2 years, if not more.

    - - - Updated - - -

    I think I'll drop the third card, save the money and get two of whatever flagship is available when these fail to run games satisfactorily.

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    I don't know about EVGA and that CPU is certainly not well suited for 3 way sli/crossfire.

    What I do know is that 3way crossfire is kind of a waste of money to begin with. Instead, getting two top of the line gfx card with a good cpu then saving up the money and spending it on the next two top of the line gfx card...
    The abuse of greatness is when it disjoins remorse from power.
    Please do not PM me for support. You will NOT get a reply. Post in the relevant forum section.

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    Quote Originally Posted by Ahnaf Akeef View Post

    I'm not planning for eyefinity. I'll be happy if this setup can provide 60+ FPS with all eye candy enabled at 2560x1440 for at least 2 years, if not more.
    biggest mistake!!! technology changes so fast that even x-fire wont give you guarranty to use it for two years. if you have 1 7970 it is sufficient for 1440p gaming. btw do you have any 30"? better save some money to use in future.

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    Quote Originally Posted by Ahnaf Akeef View Post



    I'm not planning for eyefinity. I'll be happy if this setup can provide 60+ FPS with all eye candy enabled at 2560x1440 for at least 2 years, if not more.

    - - - Updated - - -

    I think I'll drop the third card, save the money and get two of whatever flagship is available when these fail to run games satisfactorily.

    3 Way CX in 1 monitor. Don't do this injustice and it is definitely waste of money.

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    Quote Originally Posted by Ahnaf Akeef View Post
    Hi!

    I'm planning on going for the the ASUS Sabertooth Z77 with the i7 3770 (not the 'K' version).

    I want to use 3 7970 Lightnings in crossfire with this setup. It is to my understanding that LGA 1155s do not provide more than 16 lanes of PCIE 3.0.

    So basically my question is - can I use 3-way 7970 Lightning crossfire setup with the above mentioned components and ensure that the cards will be used to their full potential?

    Correct me if I;m wrong, but tests suggest that the difference in performance between x8 and x16 slots is negligible. And I'm happy if I can run them at x8,x8,x4 setup.

    If some other motherboard can fix this issue (please mention brand and model), I;m okay with getting that one instead of the Sabertooth. I just want to stick to this CPU is all.


    Thanks a lot!
    seriously man u r born lucky or hebby rich.2-way 7970 setup!!!¡¡¡....but konovabe jodi apni ne treasure isle theke immense amnt of $/£/€/¥ paisen den i wud suggest u spend it wisely.tech runs even faster than the world's fastest gfx card.ami apnar place e thakle single gtx 680 kintam.preferably pny xlr8 ba pre H20 setup wala.tasara new gen. CPU/GPU er khetre ek2 wait kora valo.IB er pre sample (i7 3770k) gula naki oc korle eder 32nm brotheren theke ek2 beshi heat dissipate kore.

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    Quote Originally Posted by CvP View Post
    I don't know about EVGA and that CPU is certainly not well suited for 3 way sli/crossfire.

    What I do know is that 3way crossfire is kind of a waste of money to begin with. Instead, getting two top of the line gfx card with a good cpu then saving up the money and spending it on the next two top of the line gfx card...
    That is exactly what I'm going to do. Whatever card I pick, its going to be two and not three.
    Do you have any idea about EVGA GPUs? I was thinking about two 680 FTW edition as an alternative to the two 7970s. Higher clocks, less driver hassles etc is making nVidia seem like a better choice to me.

    I've read somewhere on the web that AMD has better image quality compared to nVidia. Whats your opinion on this?

    - - - Updated - - -

    Quote Originally Posted by Gtx660 View Post
    seriously man u r born lucky or hebby rich.2-way 7970 setup!!!¡¡¡....but konovabe jodi apni ne treasure isle theke immense amnt of $/£/€/¥ paisen den i wud suggest u spend it wisely.tech runs even faster than the world's fastest gfx card.ami apnar place e thakle single gtx 680 kintam.preferably pny xlr8 ba pre H20 setup wala.tasara new gen. CPU/GPU er khetre ek2 wait kora valo.IB er pre sample (i7 3770k) gula naki oc korle eder 32nm brotheren theke ek2 beshi heat dissipate kore.
    One GTX 680 would hardly suffice at 1440p, imo.

    What do you mean by pre sample?

    - - - Updated - - -

    Quote Originally Posted by Sumon Datta View Post
    3 Way CX in 1 monitor. Don't do this injustice and it is definitely waste of money.
    While I do think that a third card would definitely boost performance even on a single screen, I'm going for two of whatever card I'm getting. Going to invest that money on later upgrades.

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    Quote Originally Posted by Ahnaf Akeef View Post

    - - - Updated - - -

    What do you mean by pre sample?

    - - - Updated - - -
    .
    alright man go 4 dual den.pre sample mane ekhon jgula bechtase.u shud hold off until sum1 submits prbs in foreign forums.just like B3 stepping 4 last core processor family mbs and c3 4 sb-e cpus happaned last time

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    Rather SLI two GTX 670 and use the remaining cash on a better processor, motherboard, and yes, monitors!

    :S why is BG automatically double posting? And the edit button won't work either.

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    Quote Originally Posted by K' View Post
    :S why is BG automatically double posting? And the edit button won't work either.
    I reported the problem, lets see what CvP has to say. Quite a few double posts there from Gtx660.

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    Quote Originally Posted by Ahnaf Akeef View Post
    I've read somewhere on the web that AMD has better image quality compared to nVidia. Whats your opinion on this?
    I call bullshit. In fact, there is a reason most people buy NVidia now: it is better.

    Get two GTX 680. Use for a year. Sell them. Get two GTX 780 (or similar ATi card).
    The abuse of greatness is when it disjoins remorse from power.
    Please do not PM me for support. You will NOT get a reply. Post in the relevant forum section.

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    AMD's only worth it now if you need more than two monitors per chip now. The GTX6 series otherwise wins.

    As with all technology, this will be reversed soon enough. I recommend you wait if you want to go for AMD.

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    Quote Originally Posted by dipanzan View Post
    I reported the problem, lets see what CvP has to say. Quite a few double posts there from Gtx660.
    sorry junky B$ @#!?%* browsing 4m B-link net

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    Quote Originally Posted by CvP View Post
    I call bullshit. In fact, there is a reason most people buy NVidia now: it is better.

    Get two GTX 680. Use for a year. Sell them. Get two GTX 780 (or similar ATi card).
    I never sell my computer hardware. And I'm not planning for such a short period of time either. My target is at least two years - more if possible - to run games with this setup at a satisfactory FPS.

    3GB VRAM is one of the major reasons I'd opt for the 7970s over the 680s. I've read that usage can exceed 2GB with everything enabled, and that too in Max Payne 3. Imagine the situation when Crysis 3 comes out. I want to be as ready as possible for these titles.

    That being said, 4GB 680s could be the answer. But would a premium of $85 per card over the 7970s be worth it? Especially since the brand is EVGA and the cards don't look impressive either. There arent any reviews of these cards so benchmarks, power usage, temp and noise levels are unknown.

    Here's the link : http://www.evga.com/products/moreInf...s%20Family&sw=

    Feasible opinions about the card itself and EVGA as a whole would be really helpful.

    - - - Updated - - -

    Quote Originally Posted by Codex View Post
    AMD's only worth it now if you need more than two monitors per chip now. The GTX6 series otherwise wins.

    As with all technology, this will be reversed soon enough. I recommend you wait if you want to go for AMD.
    Do you mean that 8-series will beat the 700-series?

    I don't want to wait. So many games, so little time!

    - - - Updated - - -

    Quote Originally Posted by K' View Post
    Rather SLI two GTX 670 and use the remaining cash on a better processor, motherboard, and yes, monitors!

    :S why is BG automatically double posting? And the edit button won't work either.
    I already have my eyes on a Z77 board (probably the Sabertooth Z77) and a 3770K. I don't think that saving from GPUs will be necessary, since it doesnt get much better than this setup. And about monitors, I dont want eyefinity right now. Rather a higher resolution is more to my preference.

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    Z77? Your eyes should be set on a X79, multi GPU setups benefits from faster processors and having more PCI lanes will help you in the future, but it's your decision to make, in the end.
    Last edited by dipanzan; June 24th, 2012 at 21:09.

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    It's always been like that. Nvidia does something, AMD counters it 3 months later. Nvidia gets its spot back another 3 months later, the cycle continues.


    Pick a provider and take the plunge, or you'll be waiting forever - is what I was trying to get at.

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