- Sep 22, 2011
- HP EliteDesk 800 G4 Mini
- UHD 630
- Mobile Phone
For the moment I didn't found the problem. I have tried with all possible BusIDs values but the same problem occurs. I will continue investigating.
One additional question about the 65w EliteDesk (I am thinking about searching one of it to change mine), searching in forums I see that i7-8700 can reach almost 200w when Turbo. Have you tried if your i7-8700 throttles when stressed because of temperature or not sufficient power with the included 90w PSU?
After you configure BusIDs that are valid for DP ports (e.g. replacing BusID 0x01 with BusID 0x05), you may need to experiment with other framebuffer values as well. For example, you may need to change AAPL,ig-platform-id to 0x3E9B0007 (reverse byte order 0x07009B3E). Read this entire document and see how I experimented here.
The i7-8700 is rated at 65W TDP. However, I have read that it can dissipate more power during turbo boost. Since the i7-8700 GeekBench5 scores that I have posted in this thread fall short of a real MacMini8,1, I suspect that I am seeing some thermal limiting. The PSU is not likely to be the issue - the performance is limited by cooling and the ability for the heatsink to dissipate heat in this tiny package. Regardless, I am very pleased with the performance of this HackMini8,1.
EDIT: @chanquete69 One other thing that I have mentioned in my known issues: try adding the graphics properties described here. Do they make any difference for you?
EDIT2: @chanquete69 I was playing with BusID values to see if I could give you more advice. On my system (with DP->DVI adapters) values 0x01, 0x02 and 0x04 are required for framebuffer-con0-busid, framebuffer-con1-busid and framebuffer-con2-busid respectively. If I were trying to guess BusIDs for your system (with DP connectors and no adapters), I would try 0x02, 0x04 and 0x05 (in that order for framebuffer-con0-busid, framebuffer-con1-busid and framebuffer-con2-busid respectively). I'd also make sure that the connector types were all DP (0x0400). Of course you would need the reverse byte order for each of these values in your config.plist. If that didn't work with AAPL,ig-platform-id = 0x3e920000, I would try AAPL,ig-platform-id = 0x3e9b0007 (again, you would need to change the values to reverse byte order before entering in your config.plist). Have you had any luck with your system?