Posted May 19, 2017 This may be a stupid question, but on some server motherboards, only about half of a PCIe slot is present. There are 8x data lanes, but does the lack of the rest of the pins present any sort of power delivery issue or other issues to a card that is full length 16x but placed in these half length 8x slots? For example, on this Tyan S7012 motherboard, all 5 of the slots are 8x but only half length. Would a normal graphics card work in these? Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 3 minutes ago, ellisif said: This may be a stupid question, but on some server motherboards, only about half of a PCIe slot is present. There are 8x data lanes, but does the lack of the rest of the pins present any sort of power delivery issue or other issues to a card that is full length 16x but placed in these half length 8x slots? For example, on this Tyan S7012 motherboard, all 5 of the slots are 8x but only half length. Would a normal graphics card work in these? AFAIK, 16x cards will work in an 8x slot, but only at a max of 8x bandwidth. IIRC the extra length on the connection is purely to handle the data transfer of the additional 8 lanes. I think you have to cut out the slot to allow the card to fit in though... Other people may be along soon who are more qualified to comment though, so I'd believe them over me I will only ever answer to the best of my ability - there is absolutely no promises that I will be correct. Or helpful. At all. My toaster: Spoiler CPU: Intel Core i5-4670k @ 4.3GHzMotherboard: Asus Maximus VI FormulaRAM: 16GB Corsair Vengeance DDR3GPU: Nvidia GeForce GTX770 2GBCase: Some free Sharkoon caseStorage: Crucial MX500 500GB SSD | Western Digital Blue 1TBPSU: Corsair HX750Display(s): Acer framless 24" 1080p thing | Acer 22" 1600x900 thingCooling: Corsair H100i AIO | 2 x Corsair LL120 front intakes on radiator | 1 x Corsair LL120 rear exhaustKeyboard: Steelseries ApexMouse: R.A.T 7Sound: HyperX Cloud II headset | Creative EAX 5.1 speakersOS: Windows 10 Pro Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 A gpu that runs on pcie x8 would fit, they do exist. Other than that I doubt it. Want to custom loop? Ask me more if you are curious Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 The first left side of the port (the smaller section, when talking about 16x slot/full sized slot for example) is the power, the rest of the port is data. So putting a 16X product in an 8X or even 4X slot only means you are providing less data to it. "We're all in this together, might as well be friends" Tom, Toonami. mini eLiXiVy: my open source 65% mechanical PCB, a build log, PCB anatomy and discussing open source licenses: https://linustechtips.com/topic/1366493-elixivy-a-65-mechanical-keyboard-build-log-pcb-anatomy-and-how-i-open-sourced-this-project/ mini_cardboard: a 4% keyboard build log and how keyboards work: https://linustechtips.com/topic/1328547-mini_cardboard-a-4-keyboard-build-log-and-how-keyboards-work/ Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 Just now, MrJoosh said: AFAIK, 16x cards will work in an 8x slot, but only at a max of 8x bandwidth. IIRC the extra length on the connection is purely to handle the data transfer of the additional 8 lanes. I think you have to cut out the slot to allow the card to fit in though... Other people may be along soon who are more qualified to comment though, so I'd believe them over me The slot is physically restricted to 8x Want to custom loop? Ask me more if you are curious Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 It looks like the side of the slot is open, it should still physically fit (It will just run at x8 instead of x16). Please quote our replys so we get a notification and can reply easily. Never cheap out on a PSU, or I will come to watch the fireworks. PSU Tier List My specs Spoiler PC: CPU: Intel Core i5-6600K @4.8GHz CPU Cooler: Noctua NH-U14S Motherboard: ASUS Maximus VIII Hero GPU: Zotac AMP Extreme 1070 @ 2114Mhz Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-2400 Storage: Samsung 850 EVO-Series 500GB Storage: Western Digital Caviar Blue 1TB Case: Cooler Master MasterCase Pro 5 Power Supply: EVGA 750W G2 Peripherals Keyboard: Corsair K70 LUX Browns Mouse: Logitech G502 Headphones: Kingston HyperX Cloud Revolver Monitor: U2713M @ 75Hz Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 Author Just now, MrJoosh said: AFAIK, 16x cards will work in an 8x slot, but only at a max of 8x bandwidth. IIRC the extra length on the connection is purely to handle the data transfer of the additional 8 lanes. I think you have to cut out the slot to allow the card to fit in though... Other people may be along soon who are more qualified to comment though, so I'd believe them over me Just now, Damascus said: The slot is physically restricted to 8x Most of the dual LGA 1366 motherboards with 8x length slots are actually already pre-cut to allow 16x cards it seems, I am mostly just afraid of power delivery issues for cards that need both board and external power (e.g., a GPU) rather than data issues. 2 minutes ago, Minibois said: The first left side of the port (the smaller section, when talking about 16x for example) is the power, the rest of the port is data. So putting a 16X product in an 8X or even 4X slot only means you are providing less data to it. Thanks, I didn't know that about the first part being power delivery. That clears most of it up for me. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 Author Just now, huilun02 said: Hopefully its PCIE 3.0 otherwise its going to bottleneck a powerful gpu You won't get any mobo power delivery issues Well, there's no point in putting a powerful GPU on such old motherboards (the ones I'm looking into, anyways), I just might throw some random hand-me-down GPU so it has more than the utterly garbage IGPU on most of them. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 19, 2017 7 hours ago, huilun02 said: Hopefully its PCIE 3.0 otherwise its going to bottleneck a powerful gpu You won't get any mobo power delivery issues It will not bottleneck the GPU at all. PCIe 2.0 vs 3.0 on GPUs actually doesn't make a noticeable difference. You can run a GPU in an x8 slot, but it has to get power from an external source (6+2 pin PCIe) Many server motherboards don't actually support the full power delivery, because servers aren't generally meant for GPUs. Lots of server motherboards only supply 75w of power. Just keep that in mind. My native language is C++ Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 23, 2017 Didn't read any of the other replies, but figured I'd give my experience. I have ML370 G5 with 8x slots running at 4x. Took a dremel to the graphics card (HD7770) and chopped off half the slot but it still didn't work. Turned out I needed a bus expander which took the bandwidth from the neighbouring slot to make up the speed on the 8x to full 8x. Needed to use an extension ribbon to get under the card but works out ok floating in the realms of the case. No detectable signs of decreased performance, but OCing has been a pain to the point I just didn't bother. Got 127% increase for a fair while (55celcius under load) but now it gets confused. Maybe I cooked it. Anyway, definitely doable, but make sure you don't chop off too many pins!! Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 24, 2017 it works, but the card will operate in 8x mode and run at that speed also some cards and MB's will refuse to work if they are in this config, be careful some people have permanently broken their equipment by doing this ****SORRY FOR MY ENGLISH IT'S REALLY TERRIBLE***** Been married to my wife for 3 years now! Yay! Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted August 7, 2017 yes to the 16x pcie cards. the thing to look out for is what the card hits on the motherboard. pny gt 730 is a 8x and is to short to hit anything. Just dont expect great gaming. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted August 7, 2017 If the card has external power source (PCI-E or Molex power) then you just need an 8x to 16x PCI-E riser so you preferably arent chopping up the board. You can find them on eBay or Alibaba easily. Spoiler Desktop: Ryzen9 5950X | ASUS ROG Crosshair VIII Hero (Wifi) | EVGA RTX 3080Ti FTW3 | 32GB (2x16GB) Corsair Dominator Platinum RGB Pro 3600Mhz | EKWB EK-AIO 360D-RGB | EKWB EK-Vardar RGB Fans | 1TB Samsung 980 Pro, 4TB Samsung 980 Pro | Corsair 5000D Airflow | Corsair HX850 Platinum PSU | Asus ROG 42" OLED PG42UQ + LG 32" 32GK850G Monitor | Roccat Vulcan TKL Pro Keyboard | Logitech G Pro X Superlight | MicroLab Solo 7C Speakers | Audio-Technica ATH-M50xBT2 LE Headphones | TC-Helicon GoXLR | Audio-Technica AT2035 | LTT Desk Mat | XBOX-X Controller | Windows 11 Pro Spoiler Server: Fractal Design Define R6 | Ryzen 3950x | ASRock X570 Taichi | EVGA GTX1070 FTW | 64GB (4x16GB) Corsair Vengeance LPX 3000Mhz | Corsair RM850v2 PSU | Fractal S36 Triple AIO + 4 Additional Venturi 120mm Fans | 14 x 20TB Seagate Exos X22 20TB | 500GB Aorus Gen4 NVMe | 2 x 2TB Samsung 970 Evo Plus NVMe | LSI 9211-8i HBA Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 21, 2018 Hey did you ever buy/build this? I have the same motherboard and am having issues with running a GPU. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 21, 2018 On 24/05/2017 at 2:39 AM, samiscool51 said: it works, but the card will operate in 8x mode and run at that speed also some cards and MB's will refuse to work if they are in this config, be careful some people have permanently broken their equipment by doing this How would doing this permanently damage the parts? I'm having issues running this set up myself and trying to work out what's wrong with it. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
Posted May 21, 2018 On 19/05/2017 at 10:11 PM, tt2468 said: It will not bottleneck the GPU at all. PCIe 2.0 vs 3.0 on GPUs actually doesn't make a noticeable difference. You can run a GPU in an x8 slot, but it has to get power from an external source (6+2 pin PCIe) Many server motherboards don't actually support the full power delivery, because servers aren't generally meant for GPUs. Lots of server motherboards only supply 75w of power. Just keep that in mind. How would one find out whether a motherboard supplies enough power through it's PCIe slots? I have tyan S7012 and an R9 280 which might be having power issues. Link to comment Share on other sites More sharing options... Link to post Share on other sites More sharing options...
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