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Sapphire R9 290 Tri-x OC. PSU ISSUE!!!

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  • FSP
  • Sapphire
  • Graphics
Last response: in Graphics & Displays
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March 11, 2014 5:01:39 PM

Im building new PC and now im worried about PSU i bought. R9 290 requires 48 amp rail 750w psu. My PSU is FSP Fortron Aurum S 700W (PPA7002200). Is it sufficient? My build: i7 4770, Asus Z87-A, 1x 128GB SSD, 1TB HDD 7200 rpm, 16GB ram

My PSU: http://www.fsp-europe.com/aurum_s_700.php

More about : sapphire 290 tri psu issue

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March 11, 2014 5:45:12 PM

With overclocking video cards the things you need to look at on power supplies is the power delivery on the 12v rails some power supplies have single rails some have multiple rails. in your case it looks as if your power supply has 56 amps on the 12v rail. which means that you are good at stock for your video card. Now looking into overclocking you will have enough head room with that power supply for a non aggressive overclock, but if you for what ever reason do a more aggressive overclock with something like a water block in the future you would need a upgrade. Guessing by then you probably will run crossfire. If you want a more in depth look at things with your system go to http://extreme.outervision.com/psucalculatorlite.jsp sometimes the calculations can be wrong. A lot of people only look at the watts of a power supply and don't look at the quality or power delivery standpoint, like I have a home theater pc with a sea sonic 430watt quality power supply and I was able to put my gtx 780 in there for fun to test my theory for fun. point being you don't need a crazy watt power supply most of the time as long as the power supply is good quality. Gold is very good
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March 11, 2014 6:01:03 PM

Yep thanks a lot for answer... At first I was worried that i bought first version of aurum 700w (with multiple rail 4x 18 amps),but than i found out its an S version with single rail. Im not planning to OC a lot... max to 1080-1100 mhz... I hope PSU will handle it. Now im thinking why i didnt buy I7 4771 for almost same price (about 15 Euro more)... I didnt know this revision of 4770 even exist :-) But 100 mhz does not make any difference i guess... About crossfire... im not planning it... In one or one and half year ill sell this card and buy something more recent.. :-)
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March 11, 2014 6:15:37 PM

At a bare mininimum, to run at stock speeds, you need 400W(DC) or 34amps on the +12v rail...
But, that's a minimum, you will want extra buffer room: 450W or 500W ... or 42amps on the +12v rail.

Oh, I missed the link to your power supply earlier... so yes, you got plenty to run at stock speeds ... assuming it is a quality brand (which maybe it is?)

Core i7-4770K -- 150W(DC) [aka 164W(AC) @ 90% efficiency AC to DC conversion]
http://www.xbitlabs.com/articles/cpu/display/core-i7-47...

R9 290 Tri OC
* couldn't find this exact model, but here's two close models:
R9 290 4GB -- 245W(DC)
R9 290X 4GB (quiet) -- 282W(DC)
http://www.techpowerup.com/reviews/Sapphire/R9_290X_Tri...
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March 11, 2014 6:19:32 PM

Hi Kavin... it says exactly this: http://www.comfor.cz/data/imgs/22/0220522l.jpg
edit. yes... according to reviews its not bad PSU at all... My version is Sapphire 290 (non X) with Tri-X cooler and slightly OCed. At first i wanted non reference 290x but they are totally sold out in my country... :-)
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March 11, 2014 6:24:33 PM

blowik said:
Hi Kavin... it says exactly this: http://www.comfor.cz/data/imgs/22/0220522l.jpg


Yeah, I saw that you had put the link in your first post, afterwards... sorry about that. And thanks for the info; I agree with the other poster in that it looks like it will handle the system just fine.


BTW, if you are curious, I just added up the power draw for the major parts in your computer:

The video card power I usually go to techpowerup.com and look for the model there. A lot of sites test video card power wrong and have wildly inaccurate numbers... so I just stick with techpowerup.

As for the processor, I usually stick with xbitlabs.com. Again, almost all review sites test processor power draw wrong. xbitlabs disables the monitor so the video card is not a factor in the test ... and allows you to just get numbers for the processor + base system (like motherboard & ram).
One note: xbitlabs rates their power in AC... which is not ideal... you gotta convert it to DC by factoring in AC>DC efficienciency for the power supply. For example 100W AC power would be 80W DC power for an 80% efficient power supply. You don't have to do this conversion, however, if you don't want; it will just give you a little extra padding then. :) 
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March 11, 2014 6:29:35 PM

from this article, peak current of the R9-290x overclocked is only 26A from the 12v rail, so you should be fine.

http://www.techpowerup.com/reviews/Sapphire/R9_290X_Tri...

Stock R9-290 is only 22A.

I think when they say 48A rail, they mean for the whole PC, absolute worse case, because there's no way your GPU takes 576W!! As shown above, it's around 260-300W, which ties up with the TDP being 275W stock. Your CPU will be around 95W max, may be 120W with o/c.
So roughly 450W for your whole system stock, max.

I'm getting a R9-290 Tri-x today, so will be able to confirm soon enough, with a I5 o/c to 4.4GHz.
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March 11, 2014 6:30:57 PM

leeb2013 said:
from this article, peak current is only 26A from the 12v rail, so you should be fine.

http://www.techpowerup.com/reviews/Sapphire/R9_290X_Tri...


Remember, that's only for the video card. You still have to add the processor + base system. See my previous two posts for explanations on how to do this.
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March 11, 2014 7:52:44 PM

KevinAr18 said:
leeb2013 said:
from this article, peak current is only 26A from the 12v rail, so you should be fine.

http://www.techpowerup.com/reviews/Sapphire/R9_290X_Tri...


Remember, that's only for the video card. You still have to add the processor + base system. See my previous two posts for explanations on how to do this.


Thanks, there was more to my post which covered that.

I should be able to report tonight or tomorrow how much my total system takes when benchmarking.
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March 12, 2014 3:14:54 PM

ok, had a quick play last night as I was short of time. With a 1200MHz o/c and +200mV, running Firestrike benchmark with I5 @ 4.4GHz, it was drawing 460W from the plug and GPU-z was reporting 360w to the R9-290.
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March 12, 2014 3:19:46 PM

leeb2013 said:
ok, had a quick play last night as I was short of time. With a 1200MHz o/c and +200mV, running Firestrike benchmark with I5 @ 4.4GHz, it was drawing 460W from the plug and GPU-z was reporting 360w to the R9-290.

Now this bears some investigation.

So your system is reporing 360W just for the video card ... whereas the review only reported 245W max for that model. I wonder if there's a possibility the review site could be testing the power draw wrong. I definitely will need to check that out.
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March 13, 2014 2:29:10 AM

KevinAr18 said:
leeb2013 said:
ok, had a quick play last night as I was short of time. With a 1200MHz o/c and +200mV, running Firestrike benchmark with I5 @ 4.4GHz, it was drawing 460W from the plug and GPU-z was reporting 360w to the R9-290.

Now this bears some investigation.

So your system is reporing 360W just for the video card ... whereas the review only reported 245W max for that model. I wonder if there's a possibility the review site could be testing the power draw wrong. I definitely will need to check that out.


that was with a big overclock I just did as worse case, it's typically about 250-260W at 957/5000 MHz and 1v so roughly in line.
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March 13, 2014 2:31:49 PM

leeb2013 said:
KevinAr18 said:
leeb2013 said:
ok, had a quick play last night as I was short of time. With a 1200MHz o/c and +200mV, running Firestrike benchmark with I5 @ 4.4GHz, it was drawing 460W from the plug and GPU-z was reporting 360w to the R9-290.

Now this bears some investigation.

So your system is reporing 360W just for the video card ... whereas the review only reported 245W max for that model. I wonder if there's a possibility the review site could be testing the power draw wrong. I definitely will need to check that out.


that was with a big overclock I just did as worse case, it's typically about 250-260W at 957/5000 MHz and 1v so roughly in line.


Oh good, cause I've been using that site to get power draw numbers for a while. :) 

BTW, you might be interested in this neat piece of information. In theory, I think there is a way to find out max power use for an overclocked video card, without having to actually test the card. Consider this:
http://www.playtool.com/pages/psuconnectors/connectors....
Basically, the PCI-E express slot is rated for 75W
PCI-E 6-pin cables are supposedly rated for 75W
... and PCI-E 8-pin cables are supposedly rated for 150W.

This means if a video card has two PCI-E 8-pin plugs... the max it supposedly can ever draw is 375W ... so all your overclocks will probably be limited to 375W. Perhaps that is even why you can't overclock your card any further (but that's just a guess :)  ). Neat bit of info, huh? :)  I cant' say if it's accurate, but it does seem like it *might* be.
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