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PSU question/recommendation for the following set up

Last response: in Components
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March 2, 2014 9:11:40 AM

Hello,

I am building the following:

Motherboard: Asus Z87-Pro
CPU: i5 4670k
GPU: 2 of the following HIS HD7770
RAM: 4x4Gb DDR3
SSD: 1 Samsung 840 Evo
HDD: 1 WD Black 1tb
4 fans

I know the above system requires about 497W. What I do not know is how much room should I leave between the PSU that I will buy the actual requirement? I heard from, doubling it, mutliply it by 1.5.... I am a little confuse.

I do not plan initially to OC the system as I am mostly concerned about stability as this system will be set up to replace my current set up to trade commodities.

So, I am not sure if I should go with a 650, 750W of anything else.

As I did some research and silence is to the up most importance to me, I was looking at the following units:

Seasonic X750, X650 of 660 platinum
Corsair RM 650, RM750

Any recommendation as to the size required and PSU would be greatly appreciated.
a b ) Power supply
March 2, 2014 9:22:40 AM

For starters do not crossfire the two r7770s as it is not worth the money. Instead go for an r7850 or 7870. The corsair rm650 should be fine for that.
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a c 307 ) Power supply
March 2, 2014 3:22:18 PM

dowgold said:
Hello,

I am building the following:

Motherboard: Asus Z87-Pro
CPU: i5 4670k
GPU: 2 of the following HIS HD7770
RAM: 4x4Gb DDR3
SSD: 1 Samsung 840 Evo
HDD: 1 WD Black 1tb
4 fans

I know the above system requires about 497W. What I do not know is how much room should I leave between the PSU that I will buy the actual requirement? I heard from, doubling it, mutliply it by 1.5.... I am a little confuse.

I do not plan initially to OC the system as I am mostly concerned about stability as this system will be set up to replace my current set up to trade commodities.

So, I am not sure if I should go with a 650, 750W of anything else.

As I did some research and silence is to the up most importance to me, I was looking at the following units:

Seasonic X750, X650 of 660 platinum
Corsair RM 650, RM750

Any recommendation as to the size required and PSU would be greatly appreciated.


Hi - I agree - go with the strongest single GPU you can afford unless you already own the 7770's.
Assuming you go with a single GPU or 2 - 7770's then a good 650w unit is sufficient.

If you can afford the Seasonix X650, that's the way to go. The RM series are OK, but they use budget level
caps in the secondary filtering stage.

However, post your final GPU selection here 1st, you might not need a 650.



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a b ) Power supply
March 2, 2014 4:00:09 PM

Typically, I add about a 100 watts to the calculated wattage. Use a good PSU calculator like this one:


http://extreme.outervision.com/psucalculatorlite.jsp

A 650 to 750 watt PSU should be fine.
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March 2, 2014 4:28:19 PM

SethJPC said:
For starters do not crossfire the two r7770s as it is not worth the money. Instead go for an r7850 or 7870. The corsair rm650 should be fine for that.


Thank you. The reason I have two HD 7770 is because I am running between 6 to 8 screens. I don't thing I have the need for crossfire as I do not need top of the line graphics, but just solid/good and quality/performance ratio GPU card to look at charts. No game here, at all.

Unless I am missing something. I realize that most of those sites, such as this are geared to gamers, but it definitely provide great informations even for the financial community.
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March 2, 2014 4:29:46 PM

toyftw said:
dowgold said:
Hello,

I am building the following:

Motherboard: Asus Z87-Pro
CPU: i5 4670k
GPU: 2 of the following HIS HD7770
RAM: 4x4Gb DDR3
SSD: 1 Samsung 840 Evo
HDD: 1 WD Black 1tb
4 fans

I know the above system requires about 497W. What I do not know is how much room should I leave between the PSU that I will buy the actual requirement? I heard from, doubling it, mutliply it by 1.5.... I am a little confuse.

I do not plan initially to OC the system as I am mostly concerned about stability as this system will be set up to replace my current set up to trade commodities.

So, I am not sure if I should go with a 650, 750W of anything else.

As I did some research and silence is to the up most importance to me, I was looking at the following units:

Seasonic X750, X650 of 660 platinum
Corsair RM 650, RM750

Any recommendation as to the size required and PSU would be greatly appreciated.


Hi - I agree - go with the strongest single GPU you can afford unless you already own the 7770's.
Assuming you go with a single GPU or 2 - 7770's then a good 650w unit is sufficient.

If you can afford the Seasonix X650, that's the way to go. The RM series are OK, but they use budget level
caps in the secondary filtering stage.

However, post your final GPU selection here 1st, you might not need a 650.





As per my previous post, I do not believe a single GPU will do the trick as I am running 6 to 8 monitors on a regular basis.
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March 2, 2014 4:33:03 PM

terry4536 said:
Typically, I add about a 100 watts to the calculated wattage. Use a good PSU calculator like this one:


http://extreme.outervision.com/psucalculatorlite.jsp

A 650 to 750 watt PSU should be fine.


Thank you Terry.

That is actually the site that I used to run the stats. Interestingly enough, it gave me the lowest W needed. I think that a good 650 might do the trick. I have a Silencer 750 quad that I have been using for 5 years without any problems, but I think it is time to retire it.
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a b ) Power supply
March 2, 2014 9:11:02 PM

That should do the trick.
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