Which Power Supply in this new System

Below is the system, please suggest one of the PSU's and give a reason. Thanks!

GPU: 9800GTX (http://www.newegg.com/Product/Prod [...] %2b9800gtx)
CPU: Intel E8400~3.0GHZ (http://www.newegg.com/Product/Prod [...] 6819115037)
Motherboard: ASUS P5N-D, 750i (http://www.newegg.com/Product/Prod [...] 6813131232)
RAM: 2GB Kingston HyperX DDR2 800 (http://www.newegg.com/Product/Prod [...] 6820134012)
Hard Drive: 320GB SATA-II 3.0Gb/s 16MB Cache 7200RPM (http://www.newegg.com/Product/Prod [...] 6822152054)
Disk Drive: 20X DVD±R/±RW + CD-R/RW DRIVE
Case: RaidMax Smilodon

and which PSU:

Corsair CMPSU-750TX 750Watt (http://www.corsair.com/products/tx.aspx)
Thermaltake ToughPower 750Watt (http://www.newegg.com/Product/Prod [...] 6817153036)
Thermaltake ToughPower 700Watt (http://www.newegg.com/Product/Prod [...] 6817153035)

Price does not matter between these PSU's.
Note that the Corsair has one dedicated Rail, while Thermaltake has 4 rails. Which is better for my setup?

http://www.newegg.com/Product/Prod [...] 6817703009

Do you mean the 750 vs the 700?

I would say 50 Watts....

Another vote for the PC Power And Cooling 750

2nd that!! You could even go with the Corsair vx550w PSU that has 41A on the 12V rail, which would be plenty for your rig. I'd go with Seasonic/Corsair/PCP&C/Antec brands of PSU's. At least 450w or more for that setup. 500w+ if you want some room for OC'ing and other upgrades.

I know that the VX is made by Seasonic and that makes it good, but what about the TX? Are they crappy? Or are the TX series still quality PSU's as well?


Also, thanks for the input on the overkill amount of wattage. However I do want room for another 2GB of RAM down the road and an additional 9800GTX, plus some overclocking potential.


Also, please try to restrict suggestions to only the PSU's I have given as options (for various reasons that are kinda complicated).

Thanks again

Of the three you've chosen, yes.

Who is CWT? Are they ok?

Channel Well Technology

According to Tom's review on the 9800GTX, a single card will take up around 265 at load. Theoretically, having two in SLI would then use up around 530W out of the available 624W on the 650TX's 12V rail, leaving 94W for anything else.

I would expect the PSU to hold up okay while doing light jobs, but I wouldn't be surprised if it starts giving problems when it's getting stressed out. In my opinion, upgrading towards at least the Corsair 750TX, if not the PC P&C 750W Silencer, would be money well spent.

Actually that 265 refers the the whole system load at that point.. the GTX itself only pulls ~150. Any 600+ W PS is plenty of power.. even for an SLi system generally

You could get away with less, as posted above, the VX550 is enough for your system and CWT makes their own industrial grade PSUs as well as contracted stuff for other companies, both good and bad companies, some CWT PSUs are pretty weak, others are great, the Corsairs are the latter.