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OCZ Fatal1ty + 5770, Amps per rail help

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May 24, 2010 9:00:27 PM

Hello!
Here's what I've decided on so far for my first build:

OS: Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders - OEM $99
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
HDD: SAMSUNG Spinpoint F3 HD502HJ 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive $55
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Case: Modtek Alien-X $60
http://www.modtekusa.com/index.php?page=details&id=1
RAM: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL7D-4GBRM $110
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
VC: SAPPHIRE Vapor-X 100283VXL Radeon HD 5770 1GB 128-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFireX Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
PSU: OCZ Fatal1ty OCZ550FTY 550W ATX12V v2.2 / EPS12V SLI Ready 80 PLUS Certified Modular Active PFC Power Supply
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Combo: http://www.newegg.com/Product/ComboDealDetails.aspx?Ite... $215
Total: $539

I'll be using an AMD Phenom II X4 955 Black Edition CPU, and the MoBo I'm undecided on as of yet, probably either of these 2 combo deals: (Opinions welcome on this too!)
1: http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...
2: http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I wanted the OCZ fatal1ty for 3 reasons:
1: Modular
2: The Red LED fan will look great in the case I chose
3: The combo deal from Newegg saves me an extra $46 compared to the Corsair 550, $61 if I think the rebate would work.

What I'm concerned about is, if this is PSU has enough Amps per rail for my 5770.
I read the sticky which states: http://www.tomshardware.com/forum/279391-28-power-requi...
Quote:
Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5

Core Clock: 850mhz
Stream Processors: 800
Effective Memory Clock: 4800mhz
Power Consumption at Idle: 18 watts
Power Consumption at Full Load: 108 watts
http://images17.newegg.com/is/image/newegg/14-150-464-T...$S180W$

* Recommended is a 450 watt PSU with one 75 watt 6 pin PCI Express connector, but could be run on a quality 400 watt PSU. 600 watt with two 6 pin connectors will be needed for crossfire.
* Recommended 37 Amps on 12 volt rail for single card and 50 Amps for crossfire. This card can run on lesser this is just recommended and will be able to run with at least 30 Amps on 12 volt rail.


So it shows the required amps per rail at 30-37, the OCZ is rated at 50 amps per rail, but it's a 2 rail. Does that mean it's actually 25A per rail? I searched through 10 pages of reviews on this PSU and some people said 25A while a few others said 50A. So I wanted to check here with you guys.

I will not be doing any SLI or CF, but OC is something I'd be interested in, in the future with more knowledge on the subject unless it requires more work/money than is worth it to me. Meaning if the OCZ will work perfectly fine as long as I never OC, but if I ever plan to OC then I'll need the Corsair, then I'll be fine with not OC.

Thank you in advance for your help and any advice or knowledge you're willing to share.
Kenny
a b ) Power supply
May 24, 2010 9:09:10 PM

It can handle the system without any doubt. Don't worry. If you like its look, go for it. It's a good PSU which has been made by Sirtec. In my opinion, there are some better options, but, as i have said before, if you likes its look, it's ok
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May 24, 2010 9:12:45 PM

It should be able to power your 5770, no problem. However, I have had bad experiences with OCZ PSU's and they don't last very long (my last one lasted for 5 months, OCZ stealthxstream). I would suggest going with a stronger PSU, maybe Antec Earthwatts
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Related resources
May 24, 2010 10:30:33 PM

Haha I'm doing the same combo deal on the GPU and PSU, and btw it ends tonight for the rebates. I'm trying to figure out the dimensions since they don't label which is which. Dimensions 5.9" x 3.4" x 6.3" anyone know what one is height, length, and width?
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a b ) Power supply
May 25, 2010 12:00:04 AM

I have that PSU in an encoding rig I built a few months back and it has been on 24\7 for 4 months straight with no problems at all plenty of power for a 5770. And surprisingly OCZ rebate was fast too got the visa gift card in a little over 3 weeks with no problems its a steal at the price it is being offered at with the rebate.
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May 25, 2010 12:50:00 AM

I think that the case you're going to buy have cable management so maybe you dont need modular psu, but if it's the only option of the combo, go for it.

I've been useing a 2 years old Halfman 700w (http://www.pcdiga.com/pcdiga/Produto.asp?Artigo=5464) with a asus cucore 5770, so you wont have any problems with 25A

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a b ) Power supply
May 25, 2010 2:01:58 AM

I dont believe its a true dual rail PSU I do know max combined output for the OCZ 550 Fatality is 38 AMPs which is plenty of juice to run the 5770 it could probably handle crossfire too but that would push it to its limit.
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