Best firewire card for soundcards

Hi, i am thinking of upgrading my firewire card it has the Texas Instruments Chipset TI TSB43AB23 and it has a PCI 32-bit 33MHz Interface, there is no power going to the card either, here is a link to the card i have SUNRICH TECHNOLOGY(H.K.)LIMITED So i was thinking about getting a PCIe firewire 800 card then getting a firewire 800 to 400 cabel to connect it to my Edirol FA66, here is a link to the card i am thinking about getting 3 Port 2b 1a PCI Express FireWire Card | FireWire Cards | StarTech.com it has a mini molex connecter on it for power from the PSU, then main reason i am thinking of doing this is my latency resluts



My PC Specs are as follows



Win 8.1 64bit

i7 4770k

Asus Z87k

16GB 1333Mhz Ram

Radeon HD 6770

Crucial M4 128GB (os)

Samsung EVO 840 250GB (Projects)

1x WD 1TB Black & 1x WD 1TB Blue (Samples/Banks & Back Up)



I have done all the tweeks i have been doing them for years, i also use autoruns to make sure that i only have cubase and what ever else is needed to run the OS on a offline Music Production PC, my lacency resluts are at 264 samples (which is the closest i can get to 256 samples, its just a slider in the control panel of the edirol fa66 that goes Smaller/Bigger Min/Max) the Input is 7.62ms and the Output is 14.2ms so the Overall is 21.8ms. I have also tested with CEntrance my results are at -12dB i get 901 samples and 20.43 latency the buffer size/latency doin this test is 264 samples(5.99ms)



Hope this info helps if there is anything im missing please let me know and i will update it



My main question is, would a firewire PCIe 800 card with power going to it give me better latency resluts than a firewire 400 pci card with no power



Thanks



Meltdown

Best firewire card for soundcards