Questions about GIGABYTE products > X99 Motherboards
X99-UD3 M.2 Samsung 950 Pro Slow performance
kozak79:
So I got the new Samsung 950 Pro 512GB M.2 SSD, Popped it into the M.2 Slot and ran a benchmark:
Sequential Read : 835.475 MB/s
Sequential Write : 726.472 MB/s
Drive rated to:
Sequential Read : 2,500 MB/s
Sequential Write : 1,500 MB/s
Is this a limitation of the X99 chipset or this particular board (GA-X99-UD3)?
Aladin:
Well, the product page states up to 10 Gb/s (max) which is 1.25GB/s or 1250 MB/s.
You're not that far, your confusion is probably coming from bytes (B) and bits (b), 1 byte is 8 bits. Marketing communication tend to prefer "bigger" numbers.
Some other brand of motherboards claim to have up to 32Gb/s with M.2 which would not be the bottleneck.
kozak79:
When I check the Samsung Magician Utility, it shows that M.2 is using x2 out of x4 PCI-E lanes and is running at 5Gbps out of 10Gbps. Does this motherboard not support 4 pci-e lanes for M.2 drives?
absic:
If you check the specs for this motherboard the M2 slot is rated as PCIx2/1, that is why you are getting the speeds that you are.
http://www.gigabyte.com/products/product-page.aspx?pid=5138#sp
If you want the M2 card to run at its full speed then you could invest in a PCI M2 adaptor card that plugs into one of the PCI slots on the motherboard.
kozak79:
--- Quote from: absic on November 03, 2015, 07:51:23 pm ---If you check the specs for this motherboard the M2 slot is rated as PCIx2/1, that is why you are getting the speeds that you are.
http://www.gigabyte.com/products/product-page.aspx?pid=5138#sp
If you want the M2 card to run at its full speed then you could invest in a PCI M2 adaptor card that plugs into one of the PCI slots on the motherboard.
--- End quote ---
Thanks, wasn't sure if it was limited to just 2 lanes. Ordered a Pci to M2 adaptor.
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