Recommendation for two gtx 690's

Hi, I want to run two gtx 690's (to crunch scientific simulations). What would be a good motherboard/processor combo?

The more CPU cores I can get, the better, e.g. a 2 x 8-core socket board would by great. But CPU speed is also important, so 2 x 4-core maybe? I don't have a grip on the tradeoff there. Also would like 2 x pcie 3.0 x16 slots.

Basically, what components would you choose if you wanted to build a pimped out machine like this? Budget not a huge issue but would like to stay under the 5K mark (I think 4K should be plenty?). Recommendations on power supply and cooling would be great too.... I really can't keep up with it anymore!
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More about recommendation gtx 690
  1. Here's how I would suggest such a build:

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    CPU: Intel Core i7-3930K 3.2GHz 6-Core Processor ($499.99 @ Microcenter)
    CPU Cooler: Noctua NH-D14 SE2011 CPU Cooler ($80.80 @ Amazon)
    Motherboard: ASRock X79 Extreme9 ATX LGA2011 Motherboard ($340.99 @ SuperBiiz)
    Memory: Mushkin Blackline 32GB (4 x 8GB) DDR3-1600 Memory ($219.99 @ Amazon)
    Memory: Mushkin Blackline 32GB (4 x 8GB) DDR3-1600 Memory ($219.99 @ Amazon)
    Storage: OCZ Vector Series 256GB 2.5" Solid State Disk ($269.99 @ Newegg)
    Storage: Western Digital Caviar Black 2TB 3.5" 7200RPM Internal Hard Drive ($149.99 @ NCIX US)
    Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ Amazon)
    Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ Amazon)
    Case: Silverstone RV01-BW ATX Full Tower Case ($233.13 @ TigerDirect)
    Power Supply: SeaSonic X Series 1050W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($216.82 @ Newegg)
    Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.98 @ Outlet PC)
    Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($134.98 @ Outlet PC)
    Total: $4424.63
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-05-05 15:57 EDT-0400)

    With the difference add whatever monitors, keyboard, and mouse you want. I chose the Titan instead of the 690 because the Titan is a single processor where the 690 is a dual processor on one card. With your budget you could easily move up to a full custom liquid cooling configuration as opposed to just using a D14.
  2. What about 4xgtx680
    Or hd 4xhd 7970
    I dont know ... Games and scientific stuff isnt the same i guess.
    The raw compute power is on the hd7970s side...

    Xeon-processor...
  3. forgot to mention, it needs to have CUDA cores. Reason I'd like to stick to the gtx690 is pcie 3.0, as I understand there is a little speedup there.
  4. Gtx 690 has 3072 cuda cores .
    A gtx titan has 2688 cuda cores.

    Rumours/sources say the upcoming gtx780 will have about 2500 cuda cores...
    http://wccftech.com/nvidia-geforce-700-series-launching-midmay-geforce-gtx-780-gk110-core-gtx-770-gtx-760-ti-gk104/

    I would wait, price/performance in terms of cuda cores, the gtx-780 is quiet good
  5. Nice. 4 x gtx780 would be great, and it looks like they're coming out mid May. Are these cards adequately cooled or would I run into problems with four of them? It looks like the ASRock X79 Extreme9 could handle this setup...
  6. Non-reference cards will be cooler.

    But temperature at reference cards won't be an issue even in 4-way sli. I am sure.
    With good airflow in your case no problem.
  7. Marcopolo123 said:
    What about 4xgtx680
    Or hd 4xhd 7970
    I dont know ... Games and scientific stuff isnt the same i guess.
    The raw compute power is on the hd7970s side...

    Xeon-processor...


    They're definitely not. An 8-core Xeon E5 processor would be awesome in this rig but you'd have to sacrifice at least one of the GTX 690 / Titans since they $1600 a piece.
  8. Thanks everyone. One more thing: suppose money was not a limiting factor, what system would you guys build?
  9. granto said:
    Thanks everyone. One more thing: suppose money was not a limiting factor, what system would you guys build?


    Good question.

    If money were no object I'd build something like this:

    PCPartPicker part list / Price breakdown by merchant / Benchmarks

    CPU: Intel Core i7-3970X Extreme Edition 3.5GHz 6-Core Processor ($1003.48 @ SuperBiiz)
    Memory: Corsair Dominator Platinum 32GB (4 x 8GB) DDR3-1866 Memory ($304.99 @ Newegg)
    Memory: Corsair Dominator Platinum 32GB (4 x 8GB) DDR3-1866 Memory ($304.99 @ Newegg)
    Memory: Corsair Dominator Platinum 32GB (4 x 8GB) DDR3-1866 Memory ($304.99 @ Newegg)
    Storage: OCZ Vertex 4 512GB 2.5" Solid State Disk ($524.99 @ Newegg)
    Storage: OCZ Vertex 4 512GB 2.5" Solid State Disk ($524.99 @ Newegg)
    Storage: Western Digital WD Black 4TB 3.5" 7200RPM Internal Hard Drive ($281.98 @ SuperBiiz)
    Storage: Western Digital WD Black 4TB 3.5" 7200RPM Internal Hard Drive ($281.98 @ SuperBiiz)
    Storage: Western Digital WD Black 4TB 3.5" 7200RPM Internal Hard Drive ($281.98 @ SuperBiiz)
    Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ Amazon)
    Video Card: EVGA GeForce GTX Titan 6GB Video Card (2-Way SLI) ($1019.99 @ Amazon)
    Case: Silverstone TJ11B-W ATX Full Tower Case ($586.80 @ Amazon)
    Power Supply: Corsair 1200W 80 PLUS Platinum Certified ATX12V / EPS12V Power Supply ($299.99 @ Microcenter)
    Optical Drive: Lite-On iHAS124-04 DVD/CD Writer ($17.98 @ Outlet PC)
    Operating System: Microsoft Windows 7 Professional SP1 (OEM) (64-bit) ($134.98 @ Outlet PC)
    Other: Intel Core i7-3970X ($1079.99)
    Other: EVGA Classified SRX ($649.99)
    Total: $8624.08
    (Prices include shipping, taxes, and discounts when available.)
    (Generated by PCPartPicker 2013-05-07 20:07 EDT-0400)

    Then I would add a few 1440P displays that can rotate into portrait mode, full mechanical keyboard and weighted mouse, a killer sound system, custom paint job for the case, and oh and let's not forget the full custom liquid loop for the dual CPUs (which is why there is no cooler listed). :lol:
  10. Cool! I've seen some talk about the pcie 3.0 slots being bottlenecked by that sandy bridge, i.e. that it needs ivy bridge to fully use the bandwitdth, but I'm not sure. Any truth to this?

    Realize that I will be using full GPU processing power basically full time, so it would matter. The whole reason to go gtx690 in the first place was to get the boost from pcie 3.0...

    Also, do you see an advantage of the 3970X over the 3930K since it will be at load full time?
  11. granto said:
    Cool! I've seen some talk about the pcie 3.0 slots being bottlenecked by that sandy bridge, i.e. that it needs ivy bridge to fully use the bandwitdth, but I'm not sure. Any truth to this?

    Realize that I will be using full GPU processing power basically full time, so it would matter. The whole reason to go gtx690 in the first place was to get the boost from pcie 3.0...

    Also, do you see an advantage of the 3970X over the 3930K since it will be at load full time?



    1. The term bottlenecking gets thrown around a lot and the definition gets distorted over time. PCI 3.0 and PCI 2.0 are pretty much the same, on default settings your motherboard will run at the lowest it can handle.

    2. No - you're wasting money buying the 3970X, the 3930K can match or beat those speeds for 1/2 the cost.
  12. Just in case you decide to actually get a dual-CPU mobo to use two CPUs, the i7s aren't able to run in dual mode. Only Xeons.
  13. Quote:
    Cool! I've seen some talk about the pcie 3.0 slots being bottlenecked by that sandy bridge, i.e. that it needs ivy bridge to fully use the bandwitdth, but I'm not sure. Any truth to this?


    Sandy Bridge only supports up to PCIe 2.0.
  14. Quote:
    Just in case you decide to actually get a dual-CPU mobo to use two CPUs, the i7s aren't able to run in dual mode. Only Xeons.


    Thanks, I noticed that. It looks like I'd take a considerable hit in processor speed with a dual socket setup, and it would get pretty pricey. I also don't see any dual socket mobos that people seem very happy with.

    There also appear to be no dual socket ivy bridge boards, so I'd be stuck with 4 cores if I went with ivy. Wish I could benchmark this stuff to know what's better.
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