Aspire 7 A715 74G or 75G

DaveP
DaveP Member Posts: 6 New User
Hi.

Please could someone in the UK confirm that this laptop has 2 x m.2 slots?

The reviews suggest it has with photo evidence, but Acer UK tell me it only has one. 

Many thanks. 

Dave. 

Best Answers

  • DaveP
    DaveP Member Posts: 6 New User
    Answer ✓
    Many thanks for the reply and information. 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    Answer ✓
    The NVME would be restricted by the number of mainboard PCIe bus lanes to the CPU, similar to a highway analogy. Some mainboards only have a single PCIe SATA lane. Some have two lanes and an NVME card should work a twice the SATA card speed. Some have four lanes and an  NVME care should work at four times the SATA card speed. The NVME is supposed to be backward compatible with a single lane mainboard. I use the terms ***should*** and ***supposed to*** because some NVME cards  don't work or even physically fit the SATA speed socket due to card key slots and socket keys that don't line up. Some older SATA sockets have two keys (B+M keys) that won't accept a single M slot nvme card.   Jack E/NJ




    Jack E/NJ

Answers

  • brummyfan2
    brummyfan2 ACE Posts: 28,589 Trailblazer
    Hi,
    A715-74G has two M.2 SSD slots, one is PCIe only and the other is for PCIe/SATA, A715-75G has only one M.2 SSD slot.

  • DaveP
    DaveP Member Posts: 6 New User
    Answer ✓
    Many thanks for the reply and information. 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    According to the worldwide specsheet for the 74G, two side-by-side m.2 sockets and one 2.5" HDD/SSD connector. One m.2 is for a SATA3 card. The other for a SATA3 or nvme card.

    The 75G however only has one m.2 SATA socket. Jack E/NJ




    Jack E/NJ

  • DaveP
    DaveP Member Posts: 6 New User
    Thanks for the info and diagrams. 
  • DaveP
    DaveP Member Posts: 6 New User
    JackE said:
    According to the worldwide specsheet for the 74G, two side-by-side m.2 sockets and one 2.5" HDD/SSD connector. One m.2 is for a SATA3 card. The other for a SATA3 or nvme card.

    The 75G however only has one m.2 SATA socket. Jack E/NJ




    Could I ask where you sourced the diagrams from and is there some text to go with them explaining the port discriptions? Many thanks again. 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    From specsheets see below. Jack E/NJ


    Jack E/NJ

  • DaveP
    DaveP Member Posts: 6 New User
    JackE said:
    From specsheets see below. Jack E/NJ


    Thanks for that. How do you know the one single m.2 slot on the 75G is sata only? Seems a strange
    design choice on the part of Acer.

    Thanks. 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    It should accept and use both SATA3 and NVME cards but not necessarily any speed difference between the two. Because mainboard production variations, you would have to run HWInfo64 to see if the PCIe bus can support 2xSATA or 4xSATA NVME speeds. The safest assumption is that it will only support SATA speeds with an NVME card installed. Jack E/NJ

    Jack E/NJ

  • DaveP
    DaveP Member Posts: 6 New User
    JackE said:
    It should accept and use both SATA3 and NVME cards but not necessarily any speed difference between the two. Because mainboard production variations, you would have to run HWInfo64 to see if the PCIe bus can support 2xSATA or 4xSATA NVME speeds. The safest assumption is that it will only support SATA speeds with an NVME card installed. Jack E/NJ
    Thanks Jack. 

    Excuse my ignorance but I'm not fully understanding you. 

    If the m.2 slot accepts both SATA and NVMe, why and how would the NVMe be restricted to SATA3 speeds? 
    Presumably, for the NVMe drive to work at all, it would need access to the PCIe bus, and seeing as the chipset (HM370) supports at least gen 3x2, surely that means the NVMe drive would operate as designed? 

    I'm no expert by the way, so I'm looking to be educated, and I'm definitely not doubting your advice! It's very much appreciated. 

    Thanks.

  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    Answer ✓
    The NVME would be restricted by the number of mainboard PCIe bus lanes to the CPU, similar to a highway analogy. Some mainboards only have a single PCIe SATA lane. Some have two lanes and an NVME card should work a twice the SATA card speed. Some have four lanes and an  NVME care should work at four times the SATA card speed. The NVME is supposed to be backward compatible with a single lane mainboard. I use the terms ***should*** and ***supposed to*** because some NVME cards  don't work or even physically fit the SATA speed socket due to card key slots and socket keys that don't line up. Some older SATA sockets have two keys (B+M keys) that won't accept a single M slot nvme card.   Jack E/NJ




    Jack E/NJ

  • KPS1
    KPS1 Member Posts: 1 New User
    Hi

    Just been reading through this thread and like a few others,  I'm a little confused. 
    If the specs show the 74g has JSSD! & JSSD2 both as M+B-key connectors, why would it be assumed that the 74g can only support SATA speeds? 
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    You'd have to actually check the mainboard's m.2 sockets to see if they have two key protrusions (B+M) instead a one B protrusion and/or one M protrusion. If B+M or B, then only a SATA3 card would fit. If M, then both SATA3 and NVME cards would fit. Jack E/NJ

    Jack E/NJ

  • KPS1 said:
    Hi

    Just been reading through this thread and like a few others,  I'm a little confused. 
    If the specs show the 74g has JSSD! & JSSD2 both as M+B-key connectors, why would it be assumed that the 74g can only support SATA speeds? 
    Hi,
    Both models support M.2 NVMe SSD.
    Acer Aspire A715-74G Performance Results - UserBenchmark
    Acer Aspire A715-75G Performance Results - UserBenchmark