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need help with PSU choice

T

thexider

n00b
Joined
Feb 18, 2010
Messages
3
I am in the process of building a new system and need help with determining which power supply to get that isnt overkill but will run my system stable.

I7-920 (plan to overclock)
true spirit cpu cooler
asrock X58 extreme motherboard
6g ram
4 HDD
2- 5850 ati video cards
HAF-932 full tower case

I was looking at the Corsair 850HX but is it overkill?

Suggestions?
 
For that setup, I'd definitely recommend the 850HX. Though the 750HX might be fine.
Posted via [H] Mobile Device
 
Why pick HX. The performance is better in TX and they are cheaper, provided you don't mind the extra cables.
I read that because you can unplug the wires, the efficiency will drop down.
 
From what I've read Corsair's hx line has higher efficiency and is superior to their tx line.

Also +1 for the 850hx. Better to have a bit more headroom in a psu, be it for future upgrades or running at lower loads(thus prolonging the life of the psu).

On that note, I currently run:
i7 920 d0 oc'd to 3.8ghz
2xgtx 275 in sli
1x300gb raptor
1x1.5tb seagate hdd
5xcase fans
1x soon to be installed intel 80gb ssd
on my 750tx. It runs perfectly, but I have a feeling I'm pretty much at the limit for what my psu can handle especially at load. I now regret trying to save a couple of bucks and going non-modular and lower powered when I was upgrading. C'est la vie I guess.
 
+1 for the HX850

Messerschmitt said:
Why pick HX. The performance is better in TX and they are cheaper, provided you don't mind the extra cables.
I read that because you can unplug the wires, the efficiency will drop down.
Click to expand...

all of that is load of shit
modular cables dont effect any thing at all the wire has more resistance then the connector ever will
the new 850 and 750 are both 80+ silver rated and nearly make gold the TX are all 80+ or 80+ bronze the peak numbers for the TX750 are the low numbers for the HX750

you should go read over on jonnyguru
HX850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=153
TX850
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=126
 
+1 for the HX850

Modular cables make everything so much easier to use especially when you get to higher wattage power supplies with seemingly endless cables. The $30-$50 price premium over the TX line is well worth it IMHO.
 
I currently have a TX850 and was thinking about going with the HX850. Is it worth spending another $175 just to go modular to clean up my HAF 932 case?
 
camui said:
I currently have a TX850 and was thinking about going with the HX850. Is it worth spending another $175 just to go modular to clean up my HAF 932 case?
Click to expand...

Only if its messing up your airflow.

personally I find it pointless to move to a new PSU with the same wattage, unless there's a serious efficiency, or reliability issue.
 
wewu said:
From what I've read Corsair's hx line has higher efficiency and is superior to their tx line.

Also +1 for the 850hx. Better to have a bit more headroom in a psu, be it for future upgrades or running at lower loads(thus prolonging the life of the psu).

On that note, I currently run:
i7 920 d0 oc'd to 3.8ghz
2xgtx 275 in sli
1x300gb raptor
1x1.5tb seagate hdd
5xcase fans
1x soon to be installed intel 80gb ssd
on my 750tx. It runs perfectly, but I have a feeling I'm pretty much at the limit for what my psu can handle especially at load. I now regret trying to save a couple of bucks and going non-modular and lower powered when I was upgrading. C'est la vie I guess.
Click to expand...

I'm not so sure you're at your limit yet, I think you can handle at least more GTX 275. I have a Seasonic M12D 750 watt, and it has yet to show me any problems, and I am running a full water cooling loop with 8 high-performance fans, most of which have LED's.

I think 850 HX would be overkill for even two HD5850's, due to their relatively low power consumption. A 550 watt Corsair would probably be enough to run what you're going to be running, although you'll probably be around its limit while gaming. The Corsairs can handle much more than their rated power output though. 650 watt or 750 watt if you want to be on the safe side.
 
wewu said:
On that note, I currently run:
i7 920 d0 oc'd to 3.8ghz
2xgtx 275 in sli
1x300gb raptor
1x1.5tb seagate hdd
5xcase fans
1x soon to be installed intel 80gb ssd
on my 750tx. It runs perfectly, but I have a feeling I'm pretty much at the limit for what my psu can handle especially at load. I now regret trying to save a couple of bucks and going non-modular and lower powered when I was upgrading. C'est la vie I guess.
Click to expand...

Tsumi said:
I'm not so sure you're at your limit yet, I think you can handle at least more GTX 275. I have a Seasonic M12D 750 watt, and it has yet to show me any problems, and I am running a full water cooling loop with 8 high-performance fans, most of which have LED's.

I think 850 HX would be overkill for even two HD5850's, due to their relatively low power consumption. A 550 watt Corsair would probably be enough to run what you're going to be running, although you'll probably be around its limit while gaming. The Corsairs can handle much more than their rated power output though. 650 watt or 750 watt if you want to be on the safe side.
Click to expand...
He's definitely at the limit for the Corsair 750TX:

235W - Core i7 920 OC'd to 3.8Ghz + one HDD + mobo
440W - GTX 275
--
675W Full CPU and GPU load.

Add another 15W for the second HDD that wewu has and we're looking at 690W full load for wewu's setup. Not a good idea to cram in the GTX 275. Considering that a majority of PC parts draw power mainly from the +12V rail and that the 750TX only has 60A or 720W on the +12V rail, that's pretty much the limit for the 750TX let alone a 550W PSU.

Two HD 5850 CF would use about 110W less than GTX 275 SLI. Still not in the 550W PSU range.

You don't push the PSU past its rated output. It's rated what it's rated for a reason: That's the wattage/amperage that the PSU can positively 100% deliver.

GPU figures taken from this review:
http://www.xbitlabs.com/articles/video/display/gpu-power-consumption-2010_3.html#sect0

CPU figures taken from this review:
http://www.xbitlabs.com/articles/cpu/display/power-consumption-overclocking_11.html#sect0
 
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