GIVIFENI StoreThat's good news about the DDC control. It means they must have developed an updated firmware for the AA1 board.
Which seller did you buy yours from?
I bought the LM270QQ1 variant.
GIVIFENI StoreThat's good news about the DDC control. It means they must have developed an updated firmware for the AA1 board.
Which seller did you buy yours from?
@Mowgli10L
Because the OSD is normal and straight the R9513 is connecting to the screen normally.
So that means the skew problem is between the MacBook and the R9513.
All these conversion boards work best when connected through the DisplayPort input, so the best thing is to get a USB-C to DisplayPort 4K cable, and try that.
For 5K iMac conversions it needs to be an 8K DP 1.4 cable, but for 4K/60 just a 4K cable should be OK.
I don't know enough about these boards to be sure it's a cable problem, because it might be that the firmware on the board is not right for your screen.
Normal 4K is 3840x2160, but A1418 4K iMacs have a screen that is 4096x2304, so they presumably have different firmware to enable that.
Did you tell your seller that you needed the R9513 to work with an iMac, so they could flash the board with the correct firmware??
Thanks again! I had your first version printed, I think I can get it to fit with some fiddling@valexv You're completely right, clearance is extremely tight; don't know what I was thinking when I designed it.
I've uploaded a low profile version of the board that I think will provide better access to the ports (see pic below):
iMac 5K conversion using SA1 board
This project has been entertaining (forced me learn about 3d modeling) but I think I'm ready to close it out - most likely will not try to reuse the speakers (at least for now) since the SA1 board amplifier is supposed to not be very good. Will upload the remaining models once I'm done.
View attachment 2495041
Hi again! Yes, with a USB-c to DP it works just fine! Very strange behavior on the HDMI cable though.. Wonder if it was a bad HDMI-cable or if the HDMI input to the board itself is bad?@Mowgli10L
Because the OSD is normal and straight the R9513 is connecting to the screen normally.
So that means the skew problem is between the MacBook and the R9513.
All these conversion boards work best when connected through the DisplayPort input, so the best thing is to get a USB-C to DisplayPort 4K cable, and try that.
For 5K iMac conversions it needs to be an 8K DP 1.4 cable, but for 4K/60 just a 4K cable should be OK.
I don't know enough about these boards to be sure it's a cable problem, because it might be that the firmware on the board is not right for your screen.
Normal 4K is 3840x2160, but A1418 4K iMacs have a screen that is 4096x2304, so they presumably have different firmware to enable that.
Did you tell your seller that you needed the R9513 to work with an iMac, so they could flash the board with the correct firmware??
Ah, OK. And i guess its not so simple to just update to correct firmware on my own. So i guess i stick to DP.If the board works perfectly with DP, the likelihood is that the iMac-specific 4096x2304 firmware hasn't been properly implemented for HDMI, just for DP.
I guess the skew comes from the HDMI 3840x2160 /4096x2304 mismatch....
Macs work with DP internally and through the USB-C ports, and I think the HDMI port output is derived by converting DP to HDMI internally.
@RDCh I use M2.5 inserts and M2.5x6mm screws (I bought a cheap jig in Amazon to install inserts and it's like night and day, no more fiddling with an iron solder, great investment)Thanks again! I had your first version printed, I think I can get it to fit with some fiddling
What screws are you using to fix the SA1 to the 3D-printed board?
Well. End of story. Now the thing is dead....Displays no input and goes to sleep. I guess i f*kd up trying to cram everything into the case, moving things around to much and finally breaking something. Big bummer. Just got to buy a new board.....If the board works perfectly with DP, the likelihood is that the iMac-specific 4096x2304 firmware hasn't been properly implemented for HDMI, just for DP.
I guess the skew comes from the HDMI 3840x2160 /4096x2304 mismatch....
Macs work with DP internally and through the USB-C ports, and I think the HDMI port output is derived by converting DP to HDMI internally.