October 28, 20196 yr I have one cable but I will need another, looking on Amazon they appear to be very cheap but they only state 3Gbps SATAII rather than 6Gbps SATAIII, https://www.amazon.co.uk/SFF-8087-Splitter-Adapter-Connecter-Support-Color-Black-Blue/dp/B07XPFTMNJ/ref=sr_1_15?keywords=sas+to+sata&qid=1572256227&sr=8-15 Is there actually a physical difference between the two different speeds of cable?
October 29, 20196 yr Author Tested a random cable I had in a Windows PC and the SSD max'd out at 250MB/s which indicates to me that the cable does affect the negotiated speed?
October 29, 20196 yr 31 minutes ago, Spies said: Tested a random cable I had in a Windows PC and the SSD max'd out at 250MB/s which indicates to me that the cable does affect the negotiated speed? I use this cable from Amazon with my Dell H310 HBA. It says up to 6 Gbps (SATA III), so, yes the cable can limit the speed. The HBA you use as well as the PCIe revision will also factor into maximum speeds. The H310 is PCIe 2.0 and lots of tests have shown that in an x8 slot the maximum actual throughput of PCIe 2.0 is around 3.2 GB/s so I can expect a maximum of 400 MB/s for each attached drive. Obviously, that is more than enough for HDDs which is all I have attached to that controller. You really want SSDs attached to MB SATA ports anyway and not HBAs as the MB ports support TRIM. Most HBAs do not support TRIM except for on certain SSDs. There are other discussions about the particulars in these forums.
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