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mattspace

macrumors 68040
Original poster
Jun 5, 2013
3,404
3,023
Australia
Well, just did my first install of a new graphics card, since I put a Nubus GPU in a powermac 7100 24 years ago. That one had 4mb of memory, and cost ~AU$1200. This one has 8gb, and cost ~AU$450.

Put the card in slot 1, moved the gt120 to slot 3, to give everything some space.

Oddities - plugged the GT120 into one of the alternate inputs of one of my two displays, so the 580 was plugged into both, the 120 into only one, set the 120's input to active on the display. Weirdly, the system (sierra) reported that there were 2 displays plugged into the 120, and only 1 plugged into the 580.

*edit* this was from memory - not quite correct. Then again, sierra seems to get things weird when rotating displays - it rotates the opposite display to the one you choose in the monitors prefpane (i.e. rotate the non-menubar display, and your menubar display rotates).

Anyway, powering off, and unplugging the display cable from the gt120 saw it boot with the displays correctly set up as they were before installing the 580, the boot process on an SSD is so fast you'd blink and miss the lack of bootscreen (kinda miss my verbose boot text, but i only reboot the machine every couple of weeks, so not a big loss).

However - the noise - oh god, my silence is ruined, pulled the side panel and saw the 580s fans were still, it's the PCI fan issue I've seen mentioned here. Though that would be a bummer, involving some sort of post boot auto stress app, but after about 2 minutes, the fan dropped back down from 2000 to 800rpm, and it's back to being dead quiet. I can live with that.

I'm not seeing any temps reported by iStat for the 580's temperature. I don't know if it was the dustout of the processor heatsinks, but i'm now 2 degrees cooler on the io hub tdiode (75c).

Anything else I should check power / termperature-wise?

All in all, a successful bit of surgery :)

*edit* fun quirk - previously, on the gt120 going into expose, iTunes podcast list view would have coloured artefacting for all the text & UI in content area. That doesn't manifest with the 580, which I assume is just down to the built-in Nvidia driver being a bit janky.

*edit* the rotation issue is still present - so I have my dock on the left side of my left display, which also has the menubar. Rotating the right display into portrait shifts the dock onto the right display, and swaps their arrangement so now the portrait display is "left" of the landscape one when trying to move the mouse between them. Putting the dock on the bottom of the left display results in it staying on the left display when rotating the right, but the swapping position thing still happens. Bizarre.
 
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I think many have reported less-than-optimal results with RX 580 Sapphire Pulse and anything less than 10.13.4.

well the screen rotation stuff happened with my old gpu, so that's not the new card's fault. But, Aperture is waaaay faster for scrolling though thumbnails, and for zoom and pan of the full-screen viewer, so I'm happy enough with things as they are :)
 
1) GT120 seems can work well with RX580, but actually is not. I tried this combination, the presence of the GT120 can cause the RX580 has minor issues. And the GT120 can shows lots of glitches under some conditions. If possible, remove the GT120.

2) With the RX580, you should really go for the latest OS if possible.

3) PCIe fan is an known issue. My personal recommendation.
a) install MacsFanControl
b) manually set the PCIe fan profile "base on PCIe ambient, min 40, max 60"
c) if PSU fan also suffer from high RAM, manually set the PSU fan profile "base on PSU 2 temperature, min 40, max 60 (I am 100% sure there are more than 1 PSU version, I have two 4,1 PSU on hand, they look different inside. One with more electronics, the other one has more space. The one that with more electronics run cooler. Usually idle at about 10C aove ambent. So, min 40 max 60 is fine. But the other one run warmer, can go 20C above ambient at idle, so you may adjust your PSU profile accordingly if you find that your PSU fan is too loud).

4) No temperature about RX580 in iStat is normal. But you can get the RX580 info via terminal command
Code:
ioreg -l |grep \"PerformanceStatistics\" | cut -d '{' -f 2 | tr '|' ',' | tr -d '}' | tr ',' '\n'|grep 'Temp\|Fan'
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