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ME_

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  • Birthday 09/01/1979

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  1. Hi, I just want to confirm, that I am suffering from the same issues with my Akitio Chassis and a EVGA FTW AC 2.0 GTX 970. It is only working on the second attempt - sometimes even more trials are needed to boot up the MBPro 15" with dGPU.bUT if it fails the first time, I just press the power button until the MB switches off - while having powered on the GPU/ATX all the time. After some seconds it repower the MB on and normaly it will start to boot in a proper manner. If it fails all the time, only a PRAM-Reset helped me (but of course with disconnected eGPU)... What I also can confirm but this Is maybe in the know, is, that the EFI for Win, which enables the internal IRIS PRO, will always lead to an system hang up, if the eGPU is connected. Of course is really bad, since it would be possible to save energy if we could use optimus even without the eGPU connected. However I tried to disable the 750M inside windows but without any differnce in the boot behaviour, so I flashed back the normal EFI by dd (i had an backup)... Here is my Setup:
  2. I would suggest that you are updating us of your epiphany Thunderbolt 2 eGPU [OSX] [Winsows 8.1] MXM or PCIe ($350 - $480 + Shipping)... plz stop trolling around...
  3. Hi - the owners of an Aktitio enclosure please check out my post here and tell me what you are thinking...
  4. Hi, I spend some days now on reading on GPU and TB2toPCIe. Since I have to wait for my GPU-Card I did some knowledge enrichment reading and after all I pulled out both Cards from the Akitio Chassis and took a look on it. As you can see the 4 PCIe 2.0 lanes from the PCIe/Powered Board are just forwarded to the TB2 based one but to the other side - so the pcie-board connector just acts like as a mirroring riser card for PCIe 4x (physical) <-> 16x (physical/4x electrical) by switching the sides from a to b (it is like an crossed patch cable - if you will) - I bet this is the point, why the maxexpansion TB2 cards won't work in a normal PCIe slot, since their pins are not mirrored. I guess it is plausible since this port mirroring is needed because the host needs to talk to the target by connecting in a direct manner not in slaved one let's say - since it is just an extension So - ahm - maybe I am stupid or it is just obvious and therefore not worth to be mentioned but why not just use that zillions of riser cards out there to do exactly the same by being slightly modified by doing this mirroring. So you actually could buy 2 PCIe riser cards and connect the slots in a direct way which means crosswise from the logical side? As you can see the whole logic/intelligence is sitting on the TB2 board (btw same chips like maxexpansion TB2 expander card) - so if I am right ... well start to imagine yourself... So to wrap it up, what actually just should need imho is tiny and cheap gender changer (like nando mentioned regarding the ASUS TBEX) and you are completely free by using the Akitio TB2 card, additionally put some molex connectors and the stuff for power stability (some cheap passives) to a small pcb beside a x4 and x16 PCIE slot and you are done ... Regards ME_ EDIT: The only thing beside passives is of course the 12V to 3.3V Step Down Level converter and activation by SMCLK (B5) - and this is I guess the reason why things won't work by just connecting the TB2 Card to Power since this little BUG is doing the magic. You maybe can see one line going from B5 to the Bottom switching the sides by VIA and back to the Topside at the End is going to the EN pin of the BUG mentioned above. This is what enables the output of 3.3V to at least one middle Layer of the Akitio Board PCIe/Powered Board...
  5. The DA-2 is a very lets say powerful PSU from Dell with specs like 12V@220W = ~18.3A which is preferred as a external brick shaped PSU for high currency 12V based Systems... Since it is 12V based I guess the mentioned from intelligence will not work - it's 50v 5a 250w like they say but they also say its 36W - just forget about it at all... Found the nice wrap of @jacobsson himself here
  6. Since this chassis is one of the most or at least only plug'n'playable solution I was looking for the price differential in Germany/Europe. I stumbled upon a supplier in Germany which sells the Sonnet Chassis for very competitive price, although I do not know if he will ship international or EU-wide this shop at least in Germany sells it for the best price. I wanted to mentioned that since the more cost-efficient Atikio-based or solution is as rare as that one here in Germany to find.
  7. Thank you - I still was irritated, since Nando4 wrote: but it indeed drops the let's say FPS rate....However I would love to just grab my laptop and the eGPU setup to have everything on my side, since an external LCD is not always an option.
  8. Thank you for clarifying but I still wonder if it this internal LCD accelerating will lead to less performance? So the best performance will only be possible by an external LCD, the internal can be used by enabling Optimus but will come with less performance - is that the right conclusion?
  9. Hi, okay. But also in connection to a Thunderbolt 2 connection? I am thinking of using a MSI Gaming 970 G4 in connection with the Akitio Thunder2 PCIe Box and a Thunderbolt 2 MacBook Pro. Hence I currently have a dGPU (GT750M) beside the iGPU I could not use the Optimus feature so far, but I am thinking of selling it to swap for an iGPU only MacBook Pro, if and only if Optimus could speed up things.
  10. Hi@all, i also consider to setup and assemble an eGPU solution. But I am still wondering about the advantage of optimus enabled: Is it "just" the use of the external eGPU in connection with the main (built in) screen - or will it also boost the performance? Afaik the optimus technology will drop the performance. Regarding the mobility aspects of an eGPU solution optimus would be great but than i have to deal with less performance - right? @Dschijn: it is probably to naive to mentioned it but maybe a PRAM-Reset (alt+cmd+p+r pressed while rebooting) could help?
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