Macmini3,1 samsung 840 evo ssd 3 Gigabit 1,5 Gigabit

Sad indeed, but as I suspected, & my guess is that it's not likely to be fixed by Apple. 😟

Hi all,

I also have the same problem, with a SSD Samsung 840 EVO + Mac Mini Late 2009 + Mavericks 10.9.3.

I tried with the command + s but nothing changes.

In my case, I have the negotiated speed 1.5gb in each reboot (no chances neither illusions :-| ).

The new MacMini firmware isn't installable (the OS said "This computer does not need this update")

Anybody have some news about this issue?

Thank you!

Best regards

Marcello

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NVidia MCP79 AHCI:

Fornitore: NVidia

Prodotto: MCP79 AHCI

Velocità collegamento: 3 Gigabit

Velocità link negoziata: 1.5 Gigabit

Interconnessione fisica: SATA

Descrizione: AHCI Version 1.20 Supported

Samsung SSD 840 EVO 250GB:

Capienza: 250,06 GB (250.059.350.016 byte)

Modello: Samsung SSD 840 EVO 250GB

Revisione: EXT0BB6Q

Numero di serie: S1DBNSAF428465K

Native Command Queuing: Sì

Lunghezza coda: 32

Disco estraibile: No

Unità amovibile: No

Nome BSD: disk0

Tipo supporto: Stato solido

Supporto TRIM: Sì

Nome slot: Lower

Tipo mappa partizione: GPT (GUID Partition Table, Tabella di partizione GUID)

Stato S.M.A.R.T.: Verificato

Success NVIDIA MCP79 Mac Mini mid 2010, Samsung 840 EVO SSD, 3 Gb / negotiated 3 Gb, SATA II

A bit late maybe, but I had the same problem installing 500 GB Samsung 840 EVO into my mid 2010 Mac Mini - negotiated speed 1.5 Gb/s. All suggested workarounds tried, no success.

Today, eventually, I got it working! Once again took the MacMini apart and shifted the SATA connectors for the optical drive and my SSD (i e upper to lower and vice versa). Its a bit of hazard to carefully force the flat connector ribbons to the shifted positistions, but it is possible.

Powering up (in no time) and the link speed is now finally 3 Gb / 3 Gb, stable at restart, sleep etc. (The optical disk of course still is 3 Gb / 1,5 Gb and is working fine playing DVDs). See images below. Not sure why, but probably there is a difference in the EFI for upper/lower SATA connection.

Another good thing with this switch is that the DVD drive (if empty) doesn't start and make noise during startup, it's only activated when a CD is inserted. So now my Mac Mini is a really quiet media player. Since the SSD really never gets hot, the fan is on minimum speed and is almost quiet.

In your screen shot, the SATA controller is listed as MCP89.

Has anyone with a 2009 Mac Mini tried switching the upper/lower SATA connectors on the MCP79 chipset? If so, were you successful in getting 3Gb negotiated link?

Thanks in advance.

I had a late 2009 Mini and when I replaced the rotating HD with an SSD at first it would only get 1.5 but then it got and stayed at 3. All with the originalSATA cable and connection

qalleanqa:

How did you switch the two connectors exactly? Did you have to remove the hard drive to bend the cables or could you do that by just removing the fan and antenna?

This is a flaw in Mac Mini SATA controller MCP79, that is not fully compatible to SSD Sandforce controllers.

So Samsung SSD might not give full speed on old macs.

http://blogs.helsinki.fi/tuylaant/2014/01/upgrading-old-macs-to-ssds/