If this PSU good enough for an R9 390

L

Lyric Suite

Limp Gawd
Joined
Mar 19, 2010
Messages
273
Currently trying to decide between a 970 and a R9 390, and the power draw of the latter is substantially greater:

http://www.tomshardware.com/reviews/sapphire-nitro-r9-390-8g-d5,4245.html

Here's the PSU in question:

http://www.pc-specs.com/psu/iTek/iTek_Alimentatore_iTek_mPower_820W/2280

820W but from some crappy, unknown brand. My CPU is a FX-8350 which is already very power hungry, where as my GPU is a GTX 660 which is pretty lightweight. Recommended PSU for R9 390 is 750W so i'm already riding the line here.
 
you have to check how many amps it can deliver and how many amps it relieved on the 12 volt rail.

Unfortunately their website is down, so I can't tell you definitively if it will or will not, but it is a certified 80 so I'm guessing it will be ok as long as you aren't loading up your PC with like 8 hard drives and what not.
 
I have two large HDDs plus an SSD plus a Blue-ray burner plus whatever crap i may plug into the computer at any given time.
 
that shouldn't be a problem than, size of the hard drives don't really matter cause they all draw the same amount of power.
 
Lyric Suite said:
Currently trying to decide between a 970 and a R9 390, and the power draw of the latter is substantially greater:

http://www.tomshardware.com/reviews/sapphire-nitro-r9-390-8g-d5,4245.html

Here's the PSU in question:

http://www.pc-specs.com/psu/iTek/iTek_Alimentatore_iTek_mPower_820W/2280

820W but from some crappy, unknown brand. My CPU is a FX-8350 which is already very power hungry, where as my GPU is a GTX 660 which is pretty lightweight. Recommended PSU for R9 390 is 750W so i'm already riding the line here.
Click to expand...
Get a new PSU. It's not worth risking expensive hardware on a no-named PSU. Especially a no-named PSU with ZERO information showing that it's a moderately OK PSU let alone a good PSU. Just to be clear: A good qualty 650W PSU would actually be enough for your system. But because that 820W is a no-name PSU, there's a damn good chance that it's barely capable of 500W under real world long-term conditions.

What country are you in?
What's your budget for the new PSU?
razor1 said:
you have to check how many amps it can deliver and how many amps it relieved on the 12 volt rail.

Unfortunately their website is down, so I can't tell you definitively if it will or will not, but it is a certified 80 so I'm guessing it will be ok as long as you aren't loading up your PC with like 8 hard drives and what not.
Click to expand...
Two things: Certified 80 means absolutely nothing as A) it's stupid easy to cheat and B) they only test at 25C:
http://www.hardocp.com/article/2011/10/04/80_plus_irrelevant_to_you_when_buying_psu/#.VlE8CnarRQI

Second thing: Even if 80PLus meant something, iTek doesn't have a single 820W PSU in 80Plus' Database:
http://www.plugloadsolutions.com/80PlusPowerSuppliesDetail.aspx?id=1343&type=4

So in other words, there's nothing remotely backing up that PSU's claim of 820W of power.
 
Fair enough, i guess i'll get a new one and post-pone my graphic upgrade. How's that Corsair RM750? The site i just linked to is basically the Italian Newegg, more or less, so i'd rather buy from them if possible, and that seems the cheapest one they have that's still good. The recommended wattage for the 390 is precisely 750W but i heard they inflated that number precisely to compensate for the crappy PSUs. Else i'd have to go for this:

http://www.e-key.it/prod-alimentatore-pc-modulare-corsair-rmx1000-1000w-atx-80-gold-93301.htm

Or maybe just go for the 970. Damn AMD.
 
I have a 8350 and a xfx 290 and I am lucky if I Hit 500W under heavy gaming form the wall. A 650W is plenty. Like above posters said look at the 12V rail and make sure it is a single 12V rail with enough amps to push your system with ease. I have a Corsair GS800 for the record.
 
If you plan to buy a video card like the 970 or 390 then your planning sucked if you need a new power supply as this should of been taking care of long ago.. I bought my Corsair TX 950 watt in March of 2010 and it's still running very stable with a 290x (375watt) card.

Now if money is an issue then buy the HIS R-9 290 for $229 and the Corsair CX 750watt for $59

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139040
http://www.newegg.com/Product/Product.aspx?Item=N82E16814161459

Also don't be afraid to buy refurbished power supplys from Corsair if there cheaper as I bought one to power a new supply with a R-9 280 and it has ran flawless.
 
OP, don't be afraid to pay out some $$$ for a good PSU (within the context of power requirements) before jumping up to a new GPU.

Your PSU is about the only component in the system which has the literal ability to make your rig go up in smoke. Would it not suck if your new GPU (and the rest of your rig) got zapped just because you wanted to game right now?

You don't want that. We don't want that.

Take the informed route here and go for a good PSU. Plenty of nice recommendations in the thread already.
 
Dangman said:
Get a new PSU. It's not worth risking expensive hardware on a no-named PSU. Especially a no-named PSU with ZERO information showing that it's a moderately OK PSU let alone a good PSU. Just to be clear: A good qualty 650W PSU would actually be enough for your system. But because that 820W is a no-name PSU, there's a damn good chance that it's barely capable of 500W under real world long-term conditions.

What country are you in?
What's your budget for the new PSU?

Two things: Certified 80 means absolutely nothing as A) it's stupid easy to cheat and B) they only test at 25C:
http://www.hardocp.com/article/2011/10/04/80_plus_irrelevant_to_you_when_buying_psu/#.VlE8CnarRQI

Second thing: Even if 80PLus meant something, iTek doesn't have a single 820W PSU in 80Plus' Database:
http://www.plugloadsolutions.com/80PlusPowerSuppliesDetail.aspx?id=1343&type=4

So in other words, there's nothing remotely backing up that PSU's claim of 820W of power.
Click to expand...


Good points, I was assuming 80 plus has to be certified by outside vendors, thx for the links.
 
Lyric Suite said:
Going by instinct alone i'd be leaning towards this one:

http://www.e-key.it/prod-alimentatore-pc-modulare-corsair-rmx750-750w-80-gold-93304.htm
Click to expand...

Lyric Suite said:
Fair enough, i guess i'll get a new one and post-pone my graphic upgrade. How's that Corsair RM750? The site i just linked to is basically the Italian Newegg, more or less, so i'd rather buy from them if possible, and that seems the cheapest one they have that's still good.
Click to expand...
Ignore your instincts when it comes to buying PSUs. Corsair PSUs are not what they use to be. Now, there's such a thing as a shitty Corsair PSU. Words that were practically unheard of just 5 years ago.

That particular Corsair PSU is so-so at best:
http://www.hardocp.com/article/2013/11/13/corsair_rm750_750w_power_supply_review/
Lyric Suite said:
Ha, or maybe this one:

http://www.e-key.it/prod-alimentatore-pc-modulare-corsair-cs850m-850w-atx-80-gold-64148.htm
Click to expand...
Overpriced so-so quality PSU. While a definite jump-up over your current PSU, it's just outmatched in quality and price per performance by other PSUs.


Go with either of these higher quality XFX PSUs instead:
http://www.e-key.it/prod-alimentatore-pc-modulare-xfx-proseries-750w-atx-63979.htm
http://www.e-key.it/prod-alimentatore-pc-modulare-xfx-850w-black-edition-850w-atx-80-gold-49928.htm

Lyric Suite said:
Or maybe just go for the 970. Damn AMD.
Click to expand...
Even if you went Nvidia and Intel CPU for overall lower power usage, I would still recommend getting a new PSU no matter what.

Relayer said:
According to this site it's only 27A on the +12V (324W) Not recommended.

http://www.e-key.it/prod-alimentatore-pc-modulare-itek-mpower-820w-29034.htm
Click to expand...
That site might be just listing it wrong as they have "-12V1" and "+12V"2. Generally it's "+12V1" and "+12V2". As such, that would make it a dual-rail PSU. Still doesn't tell us anything since the site does not list how much wattage is actually available to the +12V rail as a whole. The 24A and 27A just tell us the max wattage that rail can handle/output, not necessarily how much wattage the +12V rail can provide.

fanboy said:
Now if money is an issue then buy the HIS R-9 290 for $229 and the Corsair CX 750watt for $59

http://www.newegg.com/Product/Product.aspx?Item=N82E16817139040
http://www.newegg.com/Product/Product.aspx?Item=N82E16814161459
Click to expand...
THe OP is from Italy. So Newegg doesn't help. With that said, the CX750 is a terrible terrible PSU:
http://www.hardocp.com/article/2015/01/21/corsair_cx750_750w_power_supply_review/
 
Can't say for certain but I know the low wattage CX series were terrible. The higher Wattage CX was fine. I think I was 650 and or down. Wanna say for sure the 750 was fine but can't say for certain.
 
Wise words have been spoken.

If you come across a second hand Corsair AX / AXi with enough power, find its age.
If only a few years old, bag it.
They have a 7 year warranty and are exceptional quality.
 
I'm running a Rosewill Capstone G650. Single 12v rail with 54A. Plenty to run a 390/970. Been rock solid for 2 years on my system. Plus it's only $90.
 
Yeah....That EVGA PSU is very nice, no question. But expensive. You can find one a step below for less & still we be solid. XFX, Corsair, Rosewill (some) etc. Just find one that's on sale & has a decent name. I bought my Seasonic X-750 almost year before I built my system because it was on sale for $89.99 AR.
 
i have a cx500m, runs my 290 solid , been a long time.
GPU manufacturers/tech sites always exaggerate the required wattage.
 
a3venom said:
i have a cx500m, runs my 290 solid , been a long time.
GPU manufacturers/tech sites always exaggerate the required wattage.
Click to expand...

Sorry. I wouldn't trust any Corsair "CX" series with my main build. I use a CX430M (modular) that I built for my parents rig down in Florida. That's using an AMD APU CPU/GPU. Better off spending a few dollars more & get something better.
 
Importance of PSU quality is overrated, you can buy any name brand and it will run for years.
You don't need GOLD cert unless you have some extra cash for it, it should not be a priority to get an overkill psu( but most people still do)
If my shit tier PSU can run a 290 long time, there is no reason for me to consider a 650w Silver for even $10 extra. Hence i recommended 550w for a 390x
 
You must log in or register to reply here.
Back
Top