PSU Specifications What Do They mean?

[psu]

I upgraded the 300watt PSU that came with my 18 month old i7 2.93ghz PC
to a FSP 400watt AURUM series Gold 80plus AU400 PSU
http://www.fspgroupusa.com/aurum-gol...400/p/831.html

I'm upgrading my video card to a Sapphire 6770 1GB vapor x
from the mfg's website:
"450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended (600 Watt and two 6-pin connectors for AMD CrossFireX™ technology in dual mode)."
http://www.amd.com/us/products/deskt...verview.aspx#3

How can I find out if the FSP PSU can supply 75watts to the 6 pin video power connector?

Thanks

[Tator Tot]

The FSP Aurum Gold 400w can output 400w of power reliably; like wise, it can do the majority of that output on the 12v rails.
The PCIe connectors are run from the 12v rails, so it's will be able to output 75w to your GPU over the PCIe 6pin cable without an issue.

[psu]

Thanks. The PSU specs on the back of the box states it has two 12V rails each putting out 18amps. The video card mfg lists voltage requirements in watts. I'm wondering does the video card use a separate 12V rail? How do amps convert to watts? Why do they make this so hard. Why don't they make modular lower wattage PSUs?

I'm very impressed with the quality of the PSU. Japanese capacitors, all cables in braided sheaths, well built connectors, velcro cable ties. After installing the PSU I can't find the warranty card (5 year warranty) I check their website and learn I register online. The PSU is installed and the SN isn't visible. Oh well, when I open the case to install the new video card I'll copy the SN from the PSU case.

I bought it from Amazon for $68.98 delivered. NewEgg price is $79.99 delivered.

A shout out to mdk777 for recommending the FSP AU-400 PSU.
http://www.jonnyguru.com/forums/show...9711#post89711

[Tator Tot]

Amps x Volts = Watts
18A x 12v = 216w

As for your particular unit, the 12v rails are distributed as:
12v1 = Motherboard, SATA, FDD, Molex, PCIe
12v2 = CPU

Which, that type of configuration is just fine for a unit of your type.

The manual should have that information inside of it.

[Smirnoff]

The HD6770 is the same as a HD5770 and that card draws a max of 80W. Which is about 6,7A. You got plenty leftover.

[psu]

The manual only contains install instructions and pinouts with voltages.

[Smirnoff]

Either way, it'll be fine. You're not running anything that will overload any of the rails.

[psu]

Installed the Sapphire HD6770 today.
windows performance:
CPU: 7.5
memory: 7.5
graphics: 7.4
HDD (5,400rpm) 5.9

Thanks all,

Mike