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How to identify 12V rails in PSU?

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Hello!

I would like to ask, how to identify 12V rails in PSU? I mean, which rail delivers power to CPU, GPU, HDD, MB etc.

My PSU: Chieftec APS-450S - 2 rails - 18A each.

I read, that most common solution in dual rail PSU is: First rail: CPU, second rail: all the rest parts like GPU, HDD etc.

In my PSU I see, that CPU ATX 4 pin connector has green stripe on yellow cable. All other are just yellow, black, red etc without stripes.
Does it mean that one rail is for CPU only, and one rail is for the rest of PC?

Thanks in advance.

Greetings.
 

Frick

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Sounds like it's one for the CPU, one for the rest.
 
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It doesn't really matter. Single rail is typically better but balancing power is a thing of the past. Why? Are you going to be running a powerful GPU?
 
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That's bad ;/ it means, one rail could have some "free", unused power, while second rail must deliver power to all the rest components, and could be botlleneck for GPU. If I'm wrong, please correct me.

I'm asking, because wonder if my PSU could power up Radeon 7950. Rest of my PC: I5 2500K (non-OC actually), 8 GB RAM, Creative sound card, one hdd, three 120mm fans.

HD 7970/R9 280X would be to much for this power supply.

BTW. I could buy used XFX TS 550W Bronze (~litlle more than 48 months of warranty, but it was used to power up AntMiner S1 - bitcoin mining machine) for ~43$, while brand new, with 60 months of warranty costs ~ 76$ in my country. What do you think about this? In addition, this AntMiner S1 required two 6-pin PCI-E to work.
 
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No don't use that Chieftec APS-450S for a 7950 + i5 The XFX TS 550w would be much better
 
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Okay, so must buy more powerful PSU.

But, what do you think about it used XFX? Or it is better to save some money, and buy brand new?
 
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bitcoin mining isn't as stressful to a PSU as a vid card... that should be fine.
 
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XFX has some fine PSUs. Its way better
 
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xfx is usually rebadged seasonic, an awesome PSU maker.
 
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Okey, so should I buy this used XFX, or wait some more time and buy brand new?
 
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I would buy the used XFX PSU, it has a heap of warranty left.
 
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I have bought used power supply's. But keep in mind its XFX and they probably wont honor the warranty. But those PSUs are rock solid
 
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Why they propably won't honor the warranty?
If I will buy it, the seller will give me bill of sale (from shop where he bought it) which is "base" of warranty realization.

The seller has some many of these PSUs - told me, he sold ~100 already and not had single return.
 
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Like most hardware manufactures. The warranty is for end users only and it not transferable. Also many manufactures require the end user to register the item. Now just because there warranty says this does not mean they will not cover the part. Some companies still do. But XFX has been known to not even honor the "limited lifetime" Warranties on there GPUs just for not registering it

Edit: From the XFX website:
"XFX-branded hardware products purchased in the United States come with a limited hardware warranty that extends to end-user customers. Other persons in the distribution chain, including those purchasing hardware products for resale, are governed by a separate agreement. - See more at: http://xfxforce.com/en-us/support/xfx-warranty#sthash.ksLthHhG.dpuf"

May I transfer the limited hardware warranty?
The limited hardware warranty for XFX Power Supplies are non-transferrable

That's why I said that
 
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The warranty realization takes place in shop where these PSU was bought. I don't have to send PSU directly to XFX :).
 
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Did they build PC? There warranty is different if that's the case. Call them

But anyway its a good PSU so you shouldn't have any problems
 
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Like everyone said, the odds of you NEEDING the warranty are so low they are almost not worth worrying about. Doesn't hurt to check if the seller will offer you one though, since XFX warranty doesn't allow transfers of hardware bought used.
 
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I called to the shop, and they told me, there won't be problem with warranty realization.
 
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Maybe they are right. Different countries have different consumer protection laws, and XFX will probably comply if the law mandates transferable warranties (IIRC some countries do).

Don't know where you are based, just cautioning you appropriately. I doubt you'll ever even need to find out though, Seasonic (the OEM) is well known as one of the best PSU manufacturers in the industry.
 
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