Building a home rig need power supply and raid help

[raider8]

OK im building a fairly nice rig atm putting the following components in but with the amount of stuff im adding to this rig and the fact all the parts are ordered i was wondering if It would be alright to have the pci-e addapters on my graphics card running from a seperate power supply than what my mother board is running i havent been able to find a RECENT thread discussing this
my specs are
2x Ultra LSP750 750w Power Supply
EVGA X58 SLI LE Intel X58 Socket LGA1366 MB
core i7 920
2x Corsair XMS 6144MB PC10666 DDR3 1333MHz sets
HITACHI 1TB SERIAL ATA HD 7200/16MB/SATA-3G
5x Seagate 1TB Barracuda 7200.12 SATA II w/ 32MB Cache

i also had a question about the hitachi 1tb drive will it hold back the seagates in a raid 5 configuration speed wise? cause im tempted to just get 6 seagates and have the hitachi to run linux and all my other OS's on while having the faster seagates in raid 5 with 2 partitions 1 1.8TB for vista and later windows 7 and the rest as a data partition

 

[AKM880]

Are you saying that this rig is just for HTPC uses? A single PSU solution should be able to handle that system.

 

[raider8]

no also gaming some fairly signifigant video edidting and im trying to learn other things this will be much more than just my htpc

 

[raider8]

well my compuer is no longer a mass of parts im on it running mobo and gfx on seperate powersource from everything else like HD's Blu ray drive and such still need some help with how to set up hardware raid on a evga x58 le board

 

[OvrClkr]

First of all where is your video card?

You do not need 2 PSU's to power that system, im kinda lost here......

 

[raider8]

nope i dont did the research and figured out both problems im still using 2 just one is running my hard drives and blueray drive i had a plan to add another 295 and thats why i wanted to know if i could run 2 power sources to cut down on cost i forgot this thread was open XD

 

[raider8]

nope i dont did the research and figured out both problems im still using 2 just one is running my hard drives and blueray drive i had a plan to add another 295 and thats why i wanted to know if i could run 2 power sources to cut down on cost i forgot this thread was open XD

my video card is a nvidia 295gtx rev B

 

[OvrClkr]

So you have two GTX 295's? And that's the reason why you wanted to add another PSU? Dude, I hope you know what your doing cause that is some expensive hardware your dealing with.....

 

[raider8]

no at the moment i only have 1 295 IF i buy a second to add in latter i will be buying a 1000watt power supply while i can run both power supply to the graphics card seperatly i wont because i dont wanna take the chance of a ground loop i found there is equipment to do it but its not worth it

 

[Proximon]

You should dump the junky Ultra LSP and get a good PSU anyway. It would not be surprising if your 750W was really a 550W. Check under the label to see if there is a second one.

 

[obsidian86]

this should do the trick http://www.newegg.com/Product/Product.aspx?Item=N82E16817256054

 

[Proximon]

If you overclock and add more drives, plus a water cooling system, you might pull about 750W with two GTX 295s. Given efficiency curves and such you would probably need a Corsair HX1000 or something in that range. You could even get away with a PC P&C 910W, although you might not want to.

 

[raider8]

i wont water cool on principle and my drive all run on a seperate power source XD so no problems