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cMP4Ever

macrumors newbie
Original poster
Aug 21, 2019
13
0
Episode #1

Hello guys,

first, respect and admiration to tsialex for time and knowledges, to this incredible post (... and to others contributors, too) and to suggest me to post my adventure separated from orignal post about Mojave migration (https://forums.macrumors.com/thread...e-bootrom-upgrade-instructions-thread.2142418).

So here are episodes of this obstacle course.

Context :
- cMP X5690 1x3,46Ghz 48Gb RAM
- APFS volume, no FileVault
- ROM 140.0.0.0 but unable to know if MP51.0089.B00 version was applied before
- ATI 5770 and Sapphire RX580 Nitro+ 8Gb both installed and running (will be seen by High Sierra later)

Operation :
- boot on another HighSierra, and make clean install on target volume.
- shutdown, disconnect "temporary" HighSierra HDD.
- boot on "new" High Sierra. As said, the two cards are seen by OS.
- shutdown.
- disconnect ATI 5770.
- boot again, with power button during 10 seconds to force "buuuuuuuuuh" sound. Normal "chime" after.
- black screen during all boot sequence.
- login/password (admin), "About this Mac", Sapphire is recognized.
- clean install of Mojave on another APFS volume.
- reboot.... in black screen too.
- login/password (admin), it runs like a charm...

As I am very attached to boot screen and FileVault, I decided to change Sapphire for HD7950. Vendor confirmed that two functions will be present. Geekbench Sapphire's score is 130,000 points, and HD7950 one is 82,000 "only" (ok ATI 5770 shoot to 10,500...). Needs is Lightroom and Photoshop work, so HD7950 could be sufficient... but during this post, I saw that cMP can't run Mojave FileVault, with any video card.

Waiting for HD7950, I will try to improve Sapphire. "To be continued".
[doublepost=1568287779][/doublepost]Episode #2
Hello, here is what I tried last night as Mojave install:
- "MacOS" volume : everything excepted /users, no FileVault
- "Users" volume : only /users (without admin account), crypted during creation with Disk Utility

Black pre-boot screen is not solved (no expect about that...) but cMP seems to run well. Time will say more. I stay a bit worried about impossibility now to choose boot disk (during boot, with Alt key) or perform a verbose boot, and so on... I forgot : Cinebench test was surprising. ATI5770 shooted at 1610 points, and Sapphire... at 1554 points. So HD7950 purchase is still in mind (to remember : apparently 40% less performance).
[doublepost=1568287936][/doublepost]Episode #3

Hello, here next step of this marvelous adventure :)

Since yesterday evening :
- Mojave and apps installed on their own APFS volume, not crypted.
- /users*(except admin, great idea, see later why) on his own APFS volume, crypted.
- These two volumes are on the same SSD disk (and same container).
- Sapphire RX580 full-powered, one and only card running.

(*) of course, location of home directory was modified with that.


Results :
- time from "power on" to "login/password": 1'45 (...pffff... what a shame!). Just before, Sapphire fans make a peak and quasi-stop,
- trying to login as admin : no problem.
- trying to login as user (directly after boot): ... not possible :) due to disk password is required (different than user password). So, login first as admin, "/users" volume is mounting (disk password in keychain), close admin session, then user opening session runs...
- Cinebench score : 1666 pts (with ATI 5770 : 1554!!!!). Proc monitor shows full running of 12-core.
- Big photos album generated as PDF (Lightroom): exactly same time than with ATI5770 (yes I checked : "use graphic processor : YES"). Proc monitor shows 6 real cores running 100%, and 6 virtual cores running... sometimes, never up to 30% (same than HighSierra/ATI5770 case).

As there is a BIOS switch on Sapphire card, I will try next night with other position of it. Even I feel this card is faster (opening windows, surfing in Lightroom library, etc.), it has to wake up quickly to not win a one-way ticket to ebay. "Double login" is, of course, a new problem (thought to bypass FileVault impossibility on boot disk), I can't imagine use my cMP daily like that.
[doublepost=1568287984][/doublepost]Episode #4
Last tries last night :
- switch BIOS : no change (time to boot, Cinebench perfs, Lightroom perfs, ...).
- "Y" cable (2 x mini-6 to the Sapphire's 8) : no change (time to boot, Cinebench perfs, Lightroom perfs, ...).

So decision is done, Sapphire will have a good journey on ebay and I'll buy a HD7950. Hoping it will better...
 
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