Are you still running High Sierra? Metal is much more mature and improved in later MacOS versions. I know under High Sierra, I got some glitches in Premiere that went away when switching from Metal to Open CL for the Mercury Engine. After upgrading to Mojave, I could use Metal with no issues. Something similar may be happening with Geekbench.
On Tue, Apr 27, 2021 at 11:19 PM John Moore <bigfish@pacbell.net> wrote:
[Edited Message Follows]
So I got the card running okay and I just had to buy GeekBench 5.4.0 and it runs the GPU tests fine in Open CL mode but when I switch to Metal it quits the testing cycle when Feature Match comes up so I get no report. I googled and some speculate that Feature Match might make the card draw too much power but others say it's an OS issue. One person even had the GPU in an expansion chassis with a 1500 Watt PSU. So for him power would not seem to be the issue. Others say they could run the Metal GPU test in Geek Bench 4 but not in 5. I don't hear the cooling fan kicking in during these tests and I have Temp Guage app showing nice and cool low rpms on the fans.
So assuming Feature Match test is drawing too much power and that causes it to quit the test but not crash the Geek Bench 5.4.0 program why does it work correctly in Open CL? Ultimately I thought when the GPUs ran out of power they just throttled back performance but didn't necessarily crash the process running. I've been told the RX 580 needs 225 watts which it has from the multted dual mini 6 pin to 8 pin supplying 150 watts and the PCIe buss with another 75 watts. It seems to point to something quirky with Geek Bench 5.4.0 as I've found 4ish posts about similar crashes.
There is also a graphic/compute switch on the RX 580. Default is Graphic Mode which draws more power. I saw in windows there is a control panel interface where you can set the mode. I'm not sure where the switch comes into play. The mac drivers are supposedly in the OS so I see nothing in system prefs. Bottom line the card seems to work I'm just wondering if some sort of Pixas Mod would solve this testing crash?
I also found in my googling one guy said he had an RX 580 with an Apple EFI he got through Mac Vid Cards. Here is what he posted:
Here's my system specs:
Mac Pro 5,1 Mid-2010 dual CPU model, BootROM 144.0.0.0.0 (latest)
MacOS Mojave 10.14.6 with all updates
Dual 3.33GHz Xeon X5680 processors (upgraded)
Sapphire Pulse Radeon RX580 8GB with Apple EFI from MacVidCards.com
48GB ECC DDR3-10600 RAM (3x16GB matched set)
Sabrent Rocket 1TB NVMe SSD in IO-Crest SI-PEX40129 dual NVMe PCIe adapter
Inateck KT4001 USB 3.0 PCIe adapter
WD Red 6TB x2 RAID 0 + WD Green 2TB concatenated (JBOD) Apple RAID array
LG 3840x2160 Monitor (DisplayPort) + LG 1920x1080 Monitor (HDMI)"
These are not my specs but one that was posted.
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