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Sapphire Radeon HD 6770 - PSU Compatibility

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August 29, 2011 9:15:25 PM

Greetz all.

I have some concern for my PSU's compatibility with a card I recently ordered, a HD 6770. So I was wondering if any of you could give me a heads up on whether my PSU provides enough amperes on the +12 rail.

The PSU is a CIT-450 P4 model (450w) and it runs 24A through the +12V rail.

As far as I know, the 6770 works on 450W supplies but I've now come across others explaining that the quality of certain supplies isn't enough.

As far as the PSU's life expectancy, I'm not really bothered as long as it lasts out a couple of months, enough time for me to get a good replacement. And of course as long as it doesn't fry any of my components. :) 

Any advice would be greatly appreciated.
August 29, 2011 9:20:09 PM

Sorry I forgot to add that my PSU doesn't carry a 6 pin connector for the card, I was hoping to use the molex/6 pin adapter provided with the card.
a c 214 U Graphics card
August 29, 2011 9:23:59 PM

That PSU is of low quality.It's only actually able to deliver around 280watts on the +12v rail.I would reccomend getting a replacement ASAP.

Something like this would a good replacement.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...


What are the rest of your system specs?(CPU,RAM,etc.)
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a c 175 U Graphics card
August 29, 2011 9:25:23 PM

Your PSU sounds like an older generic. Since it doesn't even have a PCIE power connector, chances are it's an old design where not enough power is available on +12V (the "24A" label is probably a lie, since only a video card or a LOT of drives could require that much power). Considering that a 380W Antec Earthwatts or 400W Corsair Builder are in the $45 range, I'd get a new PSU rather than trust that old one.
August 29, 2011 9:32:28 PM

@purple stank

CPU: AMD Athlon II X4 620 (2.61GHz)
RAM: 4GB DDR2
HD: 500GB Sata II WD

Motherboard is a M-ATX Gigabyte DDR2
And my current graphics card is a 9500 GT 1GB (quite an old card now)


Also, because I'm in the UK, newegg isn't exactly convenient for me.

http://www.ebay.co.uk/itm/Coolermaster-GX550-Power-Supp...

Would this be a good option at all?

August 29, 2011 9:57:32 PM

Sick Jargon said:
@purple stank

CPU: AMD Athlon II X4 620 (2.61GHz)
RAM: 4GB DDR2
HD: 500GB Sata II WD

Motherboard is a M-ATX Gigabyte DDR2
And my current graphics card is a 9500 GT 1GB (quite an old card now)


Also, because I'm in the UK, newegg isn't exactly convenient for me.

http://www.ebay.co.uk/itm/Coolermaster-GX550-Power-Supp...

Would this be a good option at all?



Don't buy off Ebay if you can help it buy from a proper reseller like Dabs, Ebuyer, Overclocks UK, Scan etc.

You don't need anything fancy to run a 6770 but you should always buy a solid and reliable PSU such as this one. The problem with you PSU is even though it might just be able to run your need PC the likely hood is the 12v rail has high ripple i.e it doesn't always deliver a perfect 12 volts to your components which over time can damage them.
a c 214 U Graphics card
August 29, 2011 10:00:16 PM

Yes that is fine.That is one of the more high quality type of units that CoolerMaster makes.Lucky you cause they don't sell that PSU in the U.S.

As for your system it's pretty low wattage so you should be ok using that PSU for a short while.
a c 214 U Graphics card
August 29, 2011 10:01:11 PM

The CX series from Corsair is for budget builders and it's really low quality.
August 29, 2011 10:27:26 PM

Right, sort of racking my mind looking for a decent PSU for a good price on the sites suggested lol.

I appreciate all of the advice from everyone, very helpful. If you have a little more patience for me I might have another viable option.

http://www.aria.co.uk/Products/Components/Power+Supplie...

Thoughts on this supply?
a c 175 U Graphics card
August 29, 2011 10:32:01 PM

Sorry purple, we often agree, but not this time, at all.
The CX series of PSUs has been tested by competent review sites and they are quite good. Here's a CX430 review: http://www.jonnyguru.com/modules.php?name=NDReviews&op=...
And here's another: http://www.hardwaresecrets.com/article/Corsair-CX430-V2... so as you can see, that would be an excellent choice.
A Coolermaster GX, OTOH, was described by HardOCP as a "polished turd in a box," although admittedly it was the 650W version. So many of Coolermaster's PSUs are bad, even to the extent of having liar labels on them, that I can't support the company, even though their "Silent Pro" line is supposedly much better. The company is dishonest, so it doesn't deserve business.
a c 214 U Graphics card
August 29, 2011 10:38:56 PM

My problem with the CX series as that they always overstate what they can deliver.They say it delivers 430watts but the +12v rail is only capable of 330watts.It's just misleading that's all.

XFX is also a good choice.Try looking towards some Antec PSU's.They are always kind to the people on a budget.Also you should always keep expandability and futureproofing in mind.Maybe someday you will Crossfire your 6770 or get a better CPU.
a c 164 U Graphics card
August 29, 2011 11:07:18 PM

They are for budget builders, but they aren't low quality. Yes it can't output close to the previous gen 450W, but they still aren't poor quality or junk PSUs. They can output what they claim to without blowing up.
August 29, 2011 11:15:41 PM

It's likely I will simply be buying a new system after this one and passing this one along so I'm not looking to make it futureproof. Right now I'm just wanting the 6770 to run well alongside the rest of the components.

In this case would the XFX here:

http://www.aria.co.uk/Products/Components/Power+Supplie...

Suffice? Or would I really have to push towards spending £50 on another PSU such as the corsair/antec ones suggested?
a c 175 U Graphics card
August 29, 2011 11:30:33 PM

That XFX would suffice.
August 29, 2011 11:31:02 PM

Ah, I'm being a little ignorant. I read over the XFX review, it doesn't seem like a bad PSU but it does look like it has it's downfalls.

After all my messing around I'm going to settle with:

http://www.aria.co.uk/SuperSpecials/Other+products/500W...

500W Corsair Builder. It's got a nice power output and should cover any requirements my PC asks of it so it seems like a logical option, plus it is a reasonable price.

Thanks jtt for the fast response regarding the XFX. If I have any problems getting hold of the Corsair PSU, the XFX will be the one I grab :) 


I thank you all for your help with my little problem. Hopefully I'll have this all hooked up soon enough!
a c 175 U Graphics card
August 29, 2011 11:55:39 PM

That Corsair is good; I'd choose it over the XFX myself, but if you can't get it, the XFX will do.
August 30, 2011 3:51:57 PM

Sick Jargon said:
Greetz all.

I have some concern for my PSU's compatibility with a card I recently ordered, a HD 6770. So I was wondering if any of you could give me a heads up on whether my PSU provides enough amperes on the +12 rail.

The PSU is a CIT-450 P4 model (450w) and it runs 24A through the +12V rail.

As far as I know, the 6770 works on 450W supplies but I've now come across others explaining that the quality of certain supplies isn't enough.

As far as the PSU's life expectancy, I'm not really bothered as long as it lasts out a couple of months, enough time for me to get a good replacement. And of course as long as it doesn't fry any of my components. :) 

Any advice would be greatly appreciated.


http://www.thermaltake.outervision.com/index.jsp

I'm gonna run this on a 300w psu on my older pc, it'll work. Don't worry.
August 30, 2011 4:16:00 PM

I'd suggest an Antec Earthwatts 380W or a Corsair CX 430W.
a b U Graphics card
August 30, 2011 4:41:09 PM

I'd take the XFX 450W Core Edition over the CX500, it is £10 cheaper, supplies the exact same amount of power on the +12V Rail, and is made by Seasonic, it also features a longer warranty, if it was the X500 V2 on the other hand, I would advice you to get it, the CX500 isn't 80Plus.
September 2, 2011 1:11:45 PM

Just thought I'd stick my head around the door...

I installed the 6770 2 days ago, along with the 6 pin -> Molex adapter and it's working great. I've had no power output issues and everything is running fine. That is on the CIT-450W, I'm surprised with how efficient the card is, definitely worth it. So for all those considering this card with a low-end 450W PSU, it's likely that it will run just fine with the right amperes on the +12v.

Thanks again for everyones feedback on the PSU's
!