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Is a PCI-e SATA III card going to improve SSD/pc speed?

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#1 biblipeacay


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Posted 10 March 2014 - 08:25 PM

My cousin's pc: Intel G620 CPU 2.6 GHz || 4GB RAM || Hitachi 1TB spinny disc || 120GB Samsung 840 series SSD || Mobo: Asus P8H61-MX


The SSD was installed recently but the mobo only has SATA II ports. We are considering trying out a PCI-e card that provides a SATA III port but there seems to be ambiguous or complicated (control stuff I don't understand) or negative commentary around plus a very wide range of price/options that all makes my head spin.


From here we find the slots available: https://www.asus.com/Motherboards/P8H61MX/#specifications 

1 x PCIe 2.0 x16 
1 x PCIe 2.0 x1 
1 x PCIe 2.0 x4
There's already a GPU, sound card & a USB 3.0 card on board. My cousin doesn't game or listen to much music so the GPU or sound card could be removed to rely on the mobo.
Is there a recommended cheapish card around?? And which of these pci slots should/shouldn't it be installed in? (my understanding is that there's an incremental increase in speed with one of them but full -potential- 6GBs is only possible through one of them, is that right??
My cousin's pc is nicely zippy right now for their medium level usage, so the alternative would NOT be to upgrade mobo, chip etc; it would be to leave the machine as-is. But (!) they have an SSD and in my view, they ought to try for the optimum speed, if feasible. 

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#2 biblipeacay

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Posted 12 March 2014 - 06:56 AM

OOOooooK. Well, for anyone who passes by and wonders about any of this... I can tell you that an opportunity presented itself to purchase a very reasonable pcie sata iii card today and I just installed it. Everything is working fine; I'm not altogether sure how I can test the speed other than to say, even with some residual win boot menu problems, it boots to functioning ADSL (my point of finishing booting) in 43 secs which is not too bad. It 'feels' faster, but I'm not sure: it's not my pc, so I don't have intimate feelings about it. The SSD was put in a month ago and that made a lot of difference, so if adding this pcie sata iiii to the pcie-4 slot (which ought to be full speed 6GB/s) is a further improvement, it might take more general usage to judge the new normal. I'll suss out the oddities of booting (mobo screen appears twice plus now the RAID control screen plus the windows boot menu screen showing only a single win7 copy ---> all of this is a bit much/ a bit weird. I'll nut it out somehow).

#3 smax013


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Posted 13 March 2014 - 12:03 AM

If you are still curious about relative speed differences and/or is it worth it to go to SATA III, this might help:


The gist of the article's summary is that while going to full 6 Gbps SSD and motherboard will help, it will not likely help enough to stress about it.

Regardless, it sounds like it is a moot point since you did go ahead and get a new SATA 3 card.

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