5820k and M.2 SM951 x4

[seanklei10]

Sorry if this is a partial repeat question, I couldnt seem to find a direct answer and am finding some contradictory information.

I just bought a 5820k and ordered the NVHe version of the M.2 x4 Samsung SM951 512gb. I'm using this with a k4200 quadro card. Now i just read the review on:

http://www.pcper.com/reviews/Storage/PCIe-SSD-Roundup-Samsung-SM951-NVMe-vs-AHCI-XP941-SSD-750-and-M...


In the comments Rod from RamCity stated " If you bought a 5820K CPU with 28 lanes, then you'll once again be restricted to just 2 lanes on the M.2 socket, and severely limiting the performance of any PCIe 4x M.2 SSD."


Is this true even if I'm just running a single GPU and this SSD that my SSD will be forced into a 2x mode?

[Menthol]

I wouldn't think you would have an issue with only one GPU. Where did you get the NVMe version at?

[seanklei10]

Menthol wrote:
I wouldn't think you would have an issue with only one GPU. Where did you get the NVMe version at?

http://www.memorydepot.com/detail/MZVPV512HDGL-00000.html

It is on backorder now, when I contacted them they said it would take 9 business days to get in. I just placed the order yesterday, so I'll have to see how accurate that quote is.

[drop4205]

the sm951 is not nvme

[seanklei10]

drop4205 wrote:
the sm951 is not nvme

That is not entirely correct. There are two models.

MZVPV512HDGL - NVMe model
MZHPV512HDGL - AHCI model

[drop4205]

seanklei10 wrote:
That is not entirely correct. There are two models.

MZVPV512HDGL - NVMe model
MZHPV512HDGL - AHCI model

my bad. I didnt think they were out yet

[Chino]

seanklei10 wrote:


Is this true even if I'm just running a single GPU and this SSD that my SSD will be forced into a 2x mode?

No.

[Praz]

seanklei10 wrote:
In the comments Rod from RamCity stated " If you bought a 5820K CPU with 28 lanes, then you'll once again be restricted to just 2 lanes on the M.2 socket, and severely limiting the performance of any PCIe 4x M.2 SSD."


Is this true even if I'm just running a single GPU and this SSD that my SSD will be forced into a 2x mode?

Hello

This comment does not apply to ASUS X99 motherboards.

[RamCity]

seanklei10 wrote:
Sorry if this is a partial repeat question, I couldnt seem to find a direct answer and am finding some contradictory information.

I just bought a 5820k and ordered the NVHe version of the M.2 x4 Samsung SM951 512gb. I'm using this with a k4200 quadro card. Now i just read the review on:

http://www.pcper.com/reviews/Storage/PCIe-SSD-Roundup-Samsung-SM951-NVMe-vs-AHCI-XP941-SSD-750-and-M...


In the comments Rod from RamCity stated " If you bought a 5820K CPU with 28 lanes, then you'll once again be restricted to just 2 lanes on the M.2 socket, and severely limiting the performance of any PCIe 4x M.2 SSD."


Is this true even if I'm just running a single GPU and this SSD that my SSD will be forced into a 2x mode?

I provided some context before that comment:

In addition, there are some X99 motherboards (even rather high end ones like the MSI X99S SLI PLUS) that require a 40-lane CPU to allow 4x PCIe lanes to be delivered to the M.2 socket

I suspect this issue is common to MSI X99-based boards. Sorry if it sounded like a meant all X99 boards. I've only seen this with the MSI X99S SLI PLUS so far. This discovery was made on the overclock forums

cheers, Rod

[jonstatt]

RamCity wrote:
I provided some context before that comment:

In addition, there are some X99 motherboards (even rather high end ones like the MSI X99S SLI PLUS) that require a 40-lane CPU to allow 4x PCIe lanes to be delivered to the M.2 socket

I suspect this issue is common to MSI X99-based boards. Sorry if it sounded like a meant all X99 boards. I've only seen this with the MSI X99S SLI PLUS so far. This discovery was made on the overclock forums

cheers, Rod

Interesting difference between X99 based boards then.

For a 5820 you "should" be able to have:-

GPU 1 at 16x
GPU 2 at 8x
M.2 at 4x

Total 28 lanes if everything works as expected!