Thank you for your guidance. I do appreciate it is an old system but it still serves me well. I'm afraid I am still confused. As per Rajath near the top of this thread I thought introducing a PCIe SATA III card meant that the on-board SATA controller became disabled? Could you also please clarify about this TRIM feature and whether or not it is required.
Much appreciate your help.
Thank you again for this clarification. Just going a little off topic if I did decide to replace my desktop rather than upgrading my Dimension 9150 would the XPS 8500 that you mention be todays equivalent. I would want a tower PC that is easy to upgrade and take apart like the 9150 with plenty of space in the case and already containing an SSD. I would also want it to have Windows 7 Pro pre-installed as I can't stand WIN 8.
Newer PCI-E video cards have HDMI audio. If you match this with an HDMI monitor
you get Sound thru the monitor and you turn off the onboard audio in bios so the only PCI bus that does audio is the X16 slot.
You then use a Apricorn Velocity Solo x2 PCIe 2.0 x2 to SATA 6Gb/s
Thank you Speedstep for this information. Are you referring to any PCIe Video Card that has an HDMI output for Video or something different where the HDMI is just used for sound. The Video card I have in the x16 slot does have HDMI out but I am only using the DVI connection to my monitor. My monitor does not have built in speakers. If I understand correctly what you are suggesting is to then remove the audio card all together which will remove excess strain on the PCI Bus.
Sorry to put another spanner in the works but I also have a dedicated audio card in the PCI Express x4 slot and the onboard audio is turned off. The only reason I did this some while back was because I needed an audio facility that has a "What you hear" setting so I could record audio off of iPlayer Radio or live radio using Audacity.
Hope I have explained this clearly. Any further advice much appreciated.