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  1. #1
    ROG Guru: Orange Belt Array Rob W. PC Specs
    Rob W. PC Specs
    MotherboardRog Asus Rampage vi extreme
    ProcessorIntel i9-7980x Oc 4.6ghz 24/7
    Memory (part number)64 gb GSkill 3600mhz (8x8) 15,15,15,35
    Graphics Card #1nvidia Titan V + ekwb custom loop
    Graphics Card #2nvidia RTX 2080Ti on air.
    Sound Cardonboard?
    MonitorIAsus PA329Q 4k 32"
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    Storage #2Samsung ssd 970 evo 500gb m2 nvme
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    Question’ two gpu’s in same rig.

    Is there a problem in having a Titan v and a 2080ti in the rig at the same time, ?
    *reason I ask is I would like to bench both cards individually on the same platform but without having to swap the loop to do it.
    I think pcie slots 1 and 2 both work at 16x? So I could just use switches on mobo to disable the one not being tested, to my knowledge I think both slots should give same performance but please correct me if I am wrong!
    It looks also that both cards would use the same driver version.
    Any thoughts on this?

  2. #2
    ROG Guru: Yellow Belt Array F0x135 PC Specs
    F0x135 PC Specs
    MotherboardROG Strix Z370-F
    Processor8700K
    Memory (part number)F4-2400C15Q-32GTZR
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    Got to make sure the mobo you're going with is going to have enough space. I'm unsure of the clearance with TitanV, but the 2080Ti is 2.75 slot. I wanted to replace one of my 1080Ti's with a 2080Ti, but it won't fit in this z370-F setup. The x2 1080Ti's are already kissing with a 2.5 slot clearance.

  3. #3
    ROG Guru: Black Belt Array Korth PC Specs
    Korth PC Specs
    MotherboardASUS X99 R5E (BIOS2101/1902)
    ProcessorHaswell-EP E5-1680-3 SR20H/R2 (4.4GHz)
    Memory (part number)Vengeance LPX 4x8GB SS DDR4-3000 (CMK32GX4M4C3000C15)
    Graphics Card #1NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Graphics Card #2NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Sound CardJDS Labs O2+ODAC (RevB), USB2 UAC1
    MonitorASUS PG278Q
    Storage #1Samsung 850 PRO 512GB SSDs, 4xSATA3 RAID0
    Storage #2Comay BladeDrive E28 3200GB SSD, 8xPCIe2
    CPU CoolerRaijintek NEMESIS/TISIS, AS5, 2xNH-A14
    CaseObsidian 750D (original), 6xNH-A14
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    I'm not as certain that both x16 slots would give identical performance.

    One of them is simply closer to the CPU than the other. It has shorter physical and electrical lengths. Which might translate into lower signal losses or latencies. So I expect that ASUS may have hardwired or firmcoded this slot in a more preferential way ... after all, multi-GPU setups usually put most of the load on the primary GPU anyhow.

    But then again ... you can use PCIe extenders and risers, apparently with surprising lengths, and still have little measurable loss in actual performance.

    The most comprehensive way to answer this question would be to test both cards, then swap and test again ... lol, the answer would be interesting but this approach sort of defeats the reason you even ask the question.
    "All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams

    [/Korth]

  4. #4
    ROG Guru: Gold Belt Array Menthol PC Specs
    Menthol PC Specs
    MotherboardM 10 Apex / XI gene
    Processor8700K / 9900K
    Memory (part number)2x8 Gskill Trident Z 4266/2x2x8 Gskill Trident Z 4500
    Graphics Card #1RTX 2080ti / GTX 1060
    Sound CardSoundBlaster Ae5 / Onboard
    MonitorBENQ 32" 4K
    Storage #1Intel 900p 480GB/Samsung 960 Pro 1TB
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    Yes, I have done the same thing with different model cards

  5. #5
    ROG Guru: Orange Belt Array Rob W. PC Specs
    Rob W. PC Specs
    MotherboardRog Asus Rampage vi extreme
    ProcessorIntel i9-7980x Oc 4.6ghz 24/7
    Memory (part number)64 gb GSkill 3600mhz (8x8) 15,15,15,35
    Graphics Card #1nvidia Titan V + ekwb custom loop
    Graphics Card #2nvidia RTX 2080Ti on air.
    Sound Cardonboard?
    MonitorIAsus PA329Q 4k 32"
    Storage #1samsung SSD 960 EVO 250 GB. M2 nvme
    Storage #2Samsung ssd 970 evo 500gb m2 nvme
    CPU CoolerEKwb custom loop
    CaseCorsair Obsidian 900
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    Both will have EK water blocks , Titan on water is single slot, 2080ti should be reduced to that as well, it’s the stock coolers that boost there size, as to the case**airflow and space not a problem ( obsidian 900d case) .*

  6. #6
    ROG Guru: Orange Belt Array Rob W. PC Specs
    Rob W. PC Specs
    MotherboardRog Asus Rampage vi extreme
    ProcessorIntel i9-7980x Oc 4.6ghz 24/7
    Memory (part number)64 gb GSkill 3600mhz (8x8) 15,15,15,35
    Graphics Card #1nvidia Titan V + ekwb custom loop
    Graphics Card #2nvidia RTX 2080Ti on air.
    Sound Cardonboard?
    MonitorIAsus PA329Q 4k 32"
    Storage #1samsung SSD 960 EVO 250 GB. M2 nvme
    Storage #2Samsung ssd 970 evo 500gb m2 nvme
    CPU CoolerEKwb custom loop
    CaseCorsair Obsidian 900
    Power SupplyCorsair HX1200i 1200w
    Keyboard Logitech G910 orion spark
    Mouse Logitech G502 Proteus core
    OS Win 10
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    Quote Originally Posted by Korth View Post
    I'm not as certain that both x16 slots would give identical performance.

    One of them is simply closer to the CPU than the other. It has shorter physical and electrical lengths. Which might translate into lower signal losses or latencies. So I expect that ASUS may have hardwired or firmcoded this slot in a more preferential way ... after all, multi-GPU setups usually put most of the load on the primary GPU anyhow.

    But then again ... you can use PCIe extenders and risers, apparently with surprising lengths, and still have little measurable loss in actual performance.

    The most comprehensive way to answer this question would be to test both cards, then swap and test again ... lol, the answer would be interesting but this approach sort of defeats the reason you even ask the question.
    that’s what my concern was Korth, wether there would be degradation between slots.
    Still as I’m waiting for the Titan to be repaired and I haven’t got the 2080ti yet so it’s all a bit hypothetical.
    I agree it would be interesting to swap them between slots ( a lot of work ) to compare but was hoping to avoide that scenario,
    Still you have aroused my interest now so I will probably try it just to see!*

  7. #7
    ROG Guru: Black Belt Array Korth PC Specs
    Korth PC Specs
    MotherboardASUS X99 R5E (BIOS2101/1902)
    ProcessorHaswell-EP E5-1680-3 SR20H/R2 (4.4GHz)
    Memory (part number)Vengeance LPX 4x8GB SS DDR4-3000 (CMK32GX4M4C3000C15)
    Graphics Card #1NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Graphics Card #2NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Sound CardJDS Labs O2+ODAC (RevB), USB2 UAC1
    MonitorASUS PG278Q
    Storage #1Samsung 850 PRO 512GB SSDs, 4xSATA3 RAID0
    Storage #2Comay BladeDrive E28 3200GB SSD, 8xPCIe2
    CPU CoolerRaijintek NEMESIS/TISIS, AS5, 2xNH-A14
    CaseObsidian 750D (original), 6xNH-A14
    Power SupplyZalman/FSP ZM1250 Platinum
    Headset Pilot P51 PTT *modded*
    OS Arch, Gentoo, Win7x64, Win10x64
    Network RouterActiontec T3200M VDSL2 Gateway
    Accessory #1 TP-Link AC1900 Archer T9E, 1xPCIe
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    Korth's Avatar
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    For reference, I submit Linus's experiment ... the TL;DR summary is that he plugged extenders into extenders (including some "janky old" extenders of dubious reliability) until he hit stability limits and crippling fps losses somewhere around 3.0 metres ... so apparently a few centimeters makes little difference ... but that still doesn't rule out motherboard/firmware optimization choices, I don't think ASUS implements a "T-Topology" counterpart into their PCIe slots.
    "All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams

    [/Korth]

  8. #8
    Administrator Array Silent Scone@ASUS's Avatar
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    For sake of consistency, I would benchmark both of them independently.

  9. #9
    ROG Guru: Gold Belt Array Menthol PC Specs
    Menthol PC Specs
    MotherboardM 10 Apex / XI gene
    Processor8700K / 9900K
    Memory (part number)2x8 Gskill Trident Z 4266/2x2x8 Gskill Trident Z 4500
    Graphics Card #1RTX 2080ti / GTX 1060
    Sound CardSoundBlaster Ae5 / Onboard
    MonitorBENQ 32" 4K
    Storage #1Intel 900p 480GB/Samsung 960 Pro 1TB
    Storage #2Intel 750 1.2TB/Plextor 1 TB 2X 950 Pro
    CPU CoolerCorsair H150i AIO / H1110i
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    Menthol's Avatar
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    Quote Originally Posted by Silent Scone View Post
    For sake of consistency, I would benchmark both of them independently.
    I assumed that was implied

  10. #10
    Banned Array JustinThyme PC Specs
    JustinThyme PC Specs
    Laptop (Model)G752VY-DH72
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    Ive dont this. My results were everything defaulted to the slowest card.

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