Zakyn
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Content Count
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Joined
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Last visited
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Days Won
4
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Sorry. Yes I have checked that already, if signals really goes to right side and pin of connector. Now I will take a look on that GPU. Thank you very much for all of your advices. I will post some update as soon as I find some desktop where I can put my GPU.
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I think I have the footprint right, yes its other way than on schematic. But I draw it as it was in datasheet. Ye it came to my mind if it can be bad GPU. My friend told it work but guess I need to test it somewhere. I dont have any desktop at home.
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Here is my schematic. Zakyn_eGPU.pdf I will check 12v and 3v power supply and re-check RESET signal. I didnt calculate RF impedance (that's beyond my knowledge - shamefully), but as you wrote if it was only about signal integrity I think card would be detected at least. PS: Ultrabay connector has two pin numbers: one as in datasheet and second for Lenovo y510p schema (for easier orientation).
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Hi guys little update: My adapter still not working and I don't know how to find a problem. I've tried @gerald's pins for PWRGOOD and that one in Lenovo schema nothing worked. I am using 9800GTX for test run after normal boot PSU is switched on, but GPU is not detected and not giving any ouput. Differential pairs are same lenght... Signals connected according to @gerald's scheme (without some resistors, which @High_Voltage suggested not to use). Not sure what to try next. Maybe @High_Voltage have some sugestions.
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My adapter is soldered and currently not working. PSU switch is working, but GPU is not detected (PC working properly). I guess it may be some things which I made variable because the was difference between Lenovo's and gerald's scheme (like PWR_GOOD and PRSNT#1 pins). I will try some combinations and do some measurements, hope I it will be it. Edit: Current configuration is by gerald's scheme.
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My version of adapter (PCB only) is at manufacturer. I think at one week I will have it and then I will solder all parts. After that I will try to run some GPU on it Also my mPCIe adpater just arrive, I will do some benchmarks for comparison.
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Ok, I will make some pads for 0R resistors to choose between pins. thanks for response
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I just did last check before making PCB and I see reset circuit (98 PLT_RST#) on gerald's schema is actually connected to S_DGPU_RST (pin 92). I am little bit confused which is the righ pin. Can you give me a hint please?
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Yes, I have 7pcs. But I wanted more than one so its not problem. I already have one soldered in my first not working version So I hope 7 will be enough :D. This site was first where I was able to get less than hundred pcs.
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Hi, I didnt have much time recently. I want to work on that during Xmas. I already updated my schematics and now I need to redraw a board. When I finish I plan to do some tutorial for everyone (if I will be successful ). I got my ultrabay conenctor from: https://www.verical.com/pd/te-connectivity-power-connector-2199015-1-4586152.
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@Swung Huang Looks great, is it your PCB available somewhere? Which cables are you using?
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It is not possible to use SLI for two different GPUs. You can use GT750M for native display on laptop and have it as second monitor.
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I had i5-4200M, than I upgraded to i7-4800MQ and I think more powerful gpu than GTX1070 will be bottlenecked by CPU. 8x PCIe is not a problem.
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My first version was made by some local manufacturer because I don't believe it's possible to do 0,2mm tracks via toner transfer method + you need to double sided PCB, which is not that easy at this precision.
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I am not sure how long it takes for me to get promoted, can you please send me this pdf as PM?
