Posted January 4, 2016 Like the title says how will using a dual gpu setup in 8x 8x mode affect performance over 16x 16x on a PCI-e 3.0 slot. Custom PC: Intel Core i7 5960X | GTX1080 Strix | 64gb 2400mhz DDR4 Corsair Vengeance Ram | Samsung S951 256gb M.2 | 4TB WD Blue SSHD | EVGA Supernova G2 1300watt PSU | Acer XB270HU | Corsair K95 RGB | Corsair M65 RGB | Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/ Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 8x is slower than 16x Watch the video Linus did AMD FX-8350|8GB DDR3|GTX750TI|2TB HDD|CX-430 PSU| Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913226 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 You may lose 1-2 fps. That is the worst possible loss Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913227 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 You may lose 1-2 fps. That is the worst possible loss ^ This, the difference is negligible. |CPU: Intel 5960X|MOBO:Rampage V Extreme|GPU:EVGA 980Ti SC 2 - Way SLI|RAM:G-Skill 32GB|CASE:900D|PSU:CorsairAX1200i|DISPLAY :Dell U2412M X3|SSD Intel 750 400GB, 2X Samsung 850 Pro| Peripherals : | MOUSE : Logitech G602 | KEYBOARD: K70 RGB (Cherry MX Brown) | NAS: Synology DS1515+ - WD RED 3TB X 5|ROUTER: AC68U Sound : | HEADPHONES: Sennheiser HD800 SPEAKERS: B&W CM9 (Front floorstanding) , B&W CM Center 2 (Centre) | AV RECEIVER : Denon 3806 | MY X99 BUILD LOG! Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913249 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 The performance loss for running multiple graphics cards at PCI-E X8 bandwidth at PCI-Express 3.0 specifications is minimal if any -- even or something like a GTX 980 (Ti). The bandwidth PCI-Express 3.0 @ X8 is equivalent to PCI-Express 2.x @ 16. Most (if not all) consumer level cards can't fully saturate PCI-Express 2.x. Have a look: Puget systems -- 'Impact of PCI-E Speed on Gaming Performance' -- https://www.pugetsystems.com/labs/articles/Impact-of-PCI-E-Speed-on-Gaming-Performance-518/ TechPowerUp -- 'GeForce GTX 980 PCI-Express Scaling' -- https://www.techpowerup.com/reviews/NVIDIA/GTX_980_PCI-Express_Scaling/ AMD Ryzen 9000 Rig AMD R7 9800X3D + Alphacool CORE 1 w/ Performance Mount Kit + Thermal Grizzly AM5 Contact Frame Gigabyte X870E Aorus Pro Ice 32GB (16GB X2) G.Skill Trident Z5 Neo RGB DDR5-6400 Sapphire NITRO+ 6800 XT Special Edition + EKwb Full Cover Block Custom Loop w/ 2x 360mm Radiators WD SN850X + WD SN750 + Samsung 980 EVGA P2 850W + Red/White CableMod Cables Lian-Li O11 Dynamic EVO XL AMD Ryzen 5000 Rig AMD R7-5800X Gigabyte B550 Aorus Pro AC 32GB (16GB X 2) Crucial Ballistix RGB DDR4-3600 Gigabyte Vision RTX 3060 Ti OC EKwb D-RGB 360mm AIO Intel 660p NVMe 1TB + Crucial MX500 1TB + WD Black 1TB HDD EVGA P2 850W + White CableMod cables Lian-Li LanCool II Mesh - White Intel i7-8086K / Z390 Rig (Decommissioned Q2' 2025) Intel i7-6800K / X99 Rig (Officially Decommissioned, Dead CPU returned to Intel) Intel i5-4690K / Z97 Rig (Decommissioned) AMD FX-8350 / 990FX Rig (Decommissioned) AMD Phenom II X6 1090T / 890FX Rig (Decommissioned) <> Electrical Engineer , B.Eng <> <> Electronics & Computer Engineering Technologist (Diploma + Advanced Diploma) <> <> Electronics Engineering Technician for the Canadian Department of National Defence <> Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913257 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Like the title says how will using a dual gpu setup in 8x 8x mode affect performance over 16x 16x on a PCI-e 3.0 slot. You won't see a difference at all, maybe 1-2FPS less but you won't even notice that. GPU's don't use that kind of bandwidth, even the Titan X can run smoothly on a PCI-E 3.0 8x. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913267 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Linus did a video showcasing if the 5820k having only 28 PCI lanes mattered for SLi. Short answer? No, it doesn't, because 8x / 8x is just fine. 8x / 8x / 8x is fine too. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913276 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Author Linus did a video showcasing if the 5820k having only 28 PCI lanes mattered for SLi. Short answer? No, it doesn't, because 8x / 8x is just fine. 8x / 8x / 8x is fine too. Thanks that helped a lot just trying to decide if I should swap over to a 6700k vs the 5960x I already have as I no longer use my computer for rendering so the extra cores end up doing nothing most of the time Custom PC: Intel Core i7 5960X | GTX1080 Strix | 64gb 2400mhz DDR4 Corsair Vengeance Ram | Samsung S951 256gb M.2 | 4TB WD Blue SSHD | EVGA Supernova G2 1300watt PSU | Acer XB270HU | Corsair K95 RGB | Corsair M65 RGB | Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913413 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Thanks that helped a lot just trying to decide if I should swap over to a 6700k vs the 5960x I already have as I no longer use my computer for rendering so the extra cores end up doing nothing most of the time Wait. Swapping over to a 6700k, over a 5960x you already have?! Do. NOT. Do. That. You would be a dumbass to do something like that. The 5960x is pretty much the highest-end chip you can buy, and anything else (aside from a server-grade Xeon) would be an absolute downgrade. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913604 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Wait. Swapping over to a 6700k, over a 5960x you already have?! Do. NOT. Do. That. You would be a dumbass to do something like that. The 5960x is pretty much the highest-end chip you can buy, and anything else (aside from a server-grade Xeon) would be an absolute downgrade. Bahahhahahahaha!!! If anyone asks you never saw me. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913613 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Bahahhahahahaha!!! I understand that you're stretching the chip across multiple cores, versus a quad-core chip like the 6700k, but the performance gains in gaming would be marginal at absolute best. Furthermore, as more games come ot support multi-core CPUs, the 5960x is going to continue to shred through them. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913629 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 I understand that you're stretching the chip across multiple cores, versus a quad-core chip like the 6700k, but the performance gains in gaming would be marginal at absolute best. Furthermore, as more games come ot support multi-core CPUs, the 5960x is going to continue to shred through them. No I'm with you, the Skylake hype is out of control. That's like downgrading from a Corvette, to a fucking Sonic because the Sonic is "the new model" *rolls around on the floor in a fit of laughter* If anyone asks you never saw me. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913652 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Author No I'm with you, the Skylake hype is out of control. That's like downgrading from a Corvette, to a fucking Sonic because the Sonic is "the new model" *rolls around on the floor in a fit of laughter*I I was only considering due to the fact I mostly use my pc for gaming now when originally I built it for rendering and I hear a lot of people saying the 6700k is the way to go for gaming but I see what you are saying by it being a downgrade in everything else. My 5960X is a fairly good overclocker as well which I had it OC'd to 4.8ghz at 1.36 volts. Custom PC: Intel Core i7 5960X | GTX1080 Strix | 64gb 2400mhz DDR4 Corsair Vengeance Ram | Samsung S951 256gb M.2 | 4TB WD Blue SSHD | EVGA Supernova G2 1300watt PSU | Acer XB270HU | Corsair K95 RGB | Corsair M65 RGB | Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913834 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 I was only considering due to the fact I mostly use my pc for gaming now when originally I built it for rendering and I hear a lot of people saying the 6700k is the way to go for gaming but I see what you are saying by it being a downgrade in everything else. My 5960X is a fairly good overclocker as well which I had it OC'd to 4.8ghz at 1.36 volts. It would be a HUGE downgrade, comically large downgrade. If anyone asks you never saw me. Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6913898 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted January 4, 2016 Author It would be a HUGE downgrade, comically large downgrade. Ok think I will stick with the 5960X then but I definitely need to change my motherboard cause mine wont fit the new case I want to get not sure what the value of the Xpower x99 board is though I want to get the Gaming 7 MSI board as I don't need all the features on my Xpower and I need it to fit standard ATX which the Xpower Doesn't as I want to use the Define S as my new case. Custom PC: Intel Core i7 5960X | GTX1080 Strix | 64gb 2400mhz DDR4 Corsair Vengeance Ram | Samsung S951 256gb M.2 | 4TB WD Blue SSHD | EVGA Supernova G2 1300watt PSU | Acer XB270HU | Corsair K95 RGB | Corsair M65 RGB | Link to comment https://linustechtips.com/topic/520492-performance-difference-using-8x-8x-vs-16x-16x/#findComment-6914030 Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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