Can I ask why running in 2 & 3 was too intrusive? I'd planned on doing this as I have a USB 3.0 card in slot 4.
Thanks.
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SATA Express meets the '09 Mac Pro - Bootable NGFF PCIE SSD
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Can I ask why running in 2 & 3 was too intrusive? I'd planned on doing this as I have a USB 3.0 card in slot 4.
Thanks.
Hey guys, I need some advice...
after looking through this post, I went ahead and got the samsung ssd and an adapter to get the fast read/write speeds.
the ssd that I got is Samsung SM951 M.2 512GB PCI-Express 3.0 x4 AHCI NGFF 2280 SSD MZHPV512HDGL-00000, and the adapter is M.2 PCIe to PCIe 3.0 x4 Adapter (support M.2 PCIe 2280, 2260, 2242) MF-DT120. Got both on eBay.
So i was under impression that the samsung is capable of 1.5k speeds according to this post, but the max speeds that I am getting is around 740MB/s.
Did I get the wrong adapter?
btw. I am on a mac pro 5,1
thanks.
after looking through this post, I went ahead and got the samsung ssd and an adapter to get the fast read/write speeds.
the ssd that I got is Samsung SM951 M.2 512GB PCI-Express 3.0 x4 AHCI NGFF 2280 SSD MZHPV512HDGL-00000, and the adapter is M.2 PCIe to PCIe 3.0 x4 Adapter (support M.2 PCIe 2280, 2260, 2242) MF-DT120. Got both on eBay.
So i was under impression that the samsung is capable of 1.5k speeds according to this post, but the max speeds that I am getting is around 740MB/s.
Did I get the wrong adapter?
btw. I am on a mac pro 5,1
thanks.
THANK YOU to everyone on these forums. (Slightly off topic I know but I gained the most valuable knowledge from this thread)
Thanks to all the trial and error, testing and reviews from dedicated posters I am now the proud owner of my first Mac Pro. Here's what I ended up buying (from many different vendors):
Mac Pro (2010), 1x Xeon X5690 3.46GHz, 64 GB RAM (4x16GB), 2x Samsung XP941 512GB PCIe SSD, 2x Lycom DT-120, NVIDIA GTX680 2GB (now flashed), Sonnet Allegro Pro USB 3.0, Apple WiFi 802.11AC + Bluetooth 4.0
Thanks to all the trial and error, testing and reviews from dedicated posters I am now the proud owner of my first Mac Pro. Here's what I ended up buying (from many different vendors):
Mac Pro (2010), 1x Xeon X5690 3.46GHz, 64 GB RAM (4x16GB), 2x Samsung XP941 512GB PCIe SSD, 2x Lycom DT-120, NVIDIA GTX680 2GB (now flashed), Sonnet Allegro Pro USB 3.0, Apple WiFi 802.11AC + Bluetooth 4.0
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Is it plugged in to PCI-e slot 2? Many have reported that it runs slower in that slot. Try slots 3 or 4.
Figured out what I was doing wrong.
Turned out that the SM951 does not work well in PCI slot 2. In slot 2 it only uses 1x PCI speed. Moved it to slot 3 and now getting 1400MB/s speeds.
There is no delay with the XP941 and they are still available. If you can find any, x4 2013 SSUAX 1TB SSD's, they also have no delay and used to go for under $600. IMO. The E-Bay market is rather over priced for Apple SSD's these days. It's a shame as they should be cheaper than NGFF/M2 equivalents.
Stop buying the lycom cards, this issue went away for me with a different brand.
http://www.ebay.co.uk/sch/i.html?_f...313.TR0.TRC0.H0.Xjzll.TRS0&_nkw=jzll&_sacat=0
they sell cards for m.2 and apple connectors, as well as usb enclosures
With a DT-120 card, I just timed my boot-to-login screen at 34 seconds. Seems reasonable to me.
Handheld, thanks for the reply. You seem to have a similar setup, with 2 PCIe SSDs.
Can I ask what slot configuration you have? GTX680 in slot1, Apple SSD in slot 2, XP941 in slot 3 and perhaps a USB 3 card in slot 4?
If so, does that all work out ok?
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I don't believe there is a delay issue with Lycom and XP941 drives, which are PCIe 2.0.
Probably best not to spread FUD about the Lycom cards without qualifying what configuration is used. The issue is not exactly with Lycom here, more the PCIe spec and Mac EFI.
I had the issue on multiple slots, with both an apple 512gb ssd and a sm951, only thing that was consistent was that I was using two Lycom cards.
As soon as a sourced another manufacturer (disclaimer: I have zero affiliation with Jzll, I found their stock with an eBay search) the issues literally went away.
Maybe I am spreading "fud" but in my opinion the Lycom cards were to blame, I mean I couldn't even attach the pci bracket to one on the lycoms I had as it wouldn't fit into both the mount and the socket because the board had flexed (during shipping unlikely) so it was just hanging in the socket..
The Jzll cards are higher quality, silk screened and have a black PCB to match the Mac Pro. And they don't have such an obnoxious LED, I had to put black nail varnish on the Lycom ones because the green was shining out the front and rear of my chassis at night.
Not dumping on Lycom.
Thanks Lucas. Appreciate your insights.
Ugh, didn't know about the Lycom LEDs. I'm going to hate that (still waiting on the parts to arrive)
Regarding your SSDs, is your Apple card the SSUBX or SSUAX? If a B card then it's the same as an SM951, so you essentially have two of them.
The reason I ask is because I do genuinely think the Lycom cards have an issue with the SSUBX and SM951 cards.
However, the SSUAX and XP941 cards supposedly do negotiate correctly, with no delay.
What would be interesting is for those people who are having link issues and delays with their SM951 and SSUBX drives to try these JZLL cards and see what happens. Do they correctly negotiate 4x link in slot 2 for example?
Are there any delays at boot?
It might make me regret ordering two XP941s!
Hmm. I had no LED on my Lycom and the bracket fit fine and it installed in my 5,1 with no issues. Now, OTOH, the Angelbird Card that I now use has a myriad of LEDs around the periphery. The light shining out the back and through the front grill is certainly not distracting to me.
Lou
Hi
So it’s been a while since I’ve been on this thread and need a memory jog.
Just helped a friend install 2 x SM951 512gb SSD’s into his CMP - one as a boot drive, the other as a media drive.
From memory the best/only option was to install the system disk into slot 2 and the media disk into slot 3 or 4.
My issue is that System Profiler says that the slot 2 boot drive is only getting a 2.5 link speed.
Is this correct and does it make any difference?
Thanks.
So it’s been a while since I’ve been on this thread and need a memory jog.
Just helped a friend install 2 x SM951 512gb SSD’s into his CMP - one as a boot drive, the other as a media drive.
From memory the best/only option was to install the system disk into slot 2 and the media disk into slot 3 or 4.
My issue is that System Profiler says that the slot 2 boot drive is only getting a 2.5 link speed.
Is this correct and does it make any difference?
Thanks.
Thanks for the memory jog.
Will it make a difference to the boot speeds and general performance of the drive? Does this hobble the SM951?
If so, what are the options? Could I swap his graphics card into slot 2 and the SM951 into slot 1?
Cheers.
[doublepost=1456254203][/doublepost]Ok, just seen that the max speed is 768mb/s in slot 2. As a boot drive though this really shouldn’t make any odds right? It’ll still be super fast to boot and use from day to day?
Afaik maximum speed will be around 700 MB/s. But if your friend uses it as system disk I don't see a major problem.
Boot speed should not differ, my Mac Pro has around 18 seconds, wether booting the OS on the PCI-E SSD or on a SATA-SSD.
Boot speed should not differ, my Mac Pro has around 18 seconds, wether booting the OS on the PCI-E SSD or on a SATA-SSD.
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Cool man - appreciate your help. Just found this post from crjackson2134 on this very issue:
"I can easily get 12 second boot times if I place it in Slot 2. The trade off is that it only initializes at 2.5GT/s (as opposed to 5.0GT/s). So it runs at 1/2 speed for data transfers (App Launching and OS loading are just as fast though). The reality of for me is that I'm okay at 2.5GT/s in slot 2. In daily use for me, slot 2 (with really fast booting) feels just as fast as slot 3/4. I'm told by one user, that if I get a 1TB SSUBX (instead of my 512GB), then it will initialize at the full 5.0GT/s with X4 lanes and provide the fast booting as well. In other words, you can have it all, but you've got to pay, if you want to play. The 512 SSUBX I have is lightning fast as it is and boots in 12 seconds from a cold start. I'm golden for now. It’s all a personal decision based on your needs.”
So I’m relieved for my pal. He’s still good to go. Will the link speed thing ever get fixed do you think?
I bought 2x XP941 blades because of this issue. I installed yesterday and get just awesome speeds in both slot 2 and slot 3. And yes, they both negotiate at 5.0GT/s.
I'd recommend returning the SM951s for XP941, which are also cheaper.
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Thanks for the info. All coming back to me now.
[doublepost=1456264618][/doublepost]
Thanks. Personally I'd swap just the boot 951 for a 941. The 941 being much quicker than a half speed 951. And as you say, cheaper. Thanks for the advice!
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Yep, that makes sense.
The cheaper price and boot delay in SM951 swayed me towards two 941s, oh, and I wanted to keep my future RAID options open by buying the same models.