Which Seasonic-X series for new build?

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Salamander

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Feb 24, 2002
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I'm collecting parts for a new build, and am looking for advice regarding which Seasonic X-series PSU I should get. NOTE: Please do NOT give me suggestions on other brands of PSUs.

I'm looking at the following parts:

- Mobo - yet to be determined
- Intel Core I7-2600K Sandy Bridge 3.4GHz
- HSF - yet to be determined
- Corsair Performance Pro Series CSSD-P256GBP-BK SSD
- Two - 2 TB Western Digital hard drive
- Plextor PX-LB950SA burner
- HT Omega Claro Halo sound card
- Gigabyte GV-R7970C-3GD Radeon 7970 graphics card
- AFT Pro-57U card reader
- Seasonic X-series PSU - specific one yet to be determined
- Cyberpower UPS - specific one yet to be determined
- 16-32 GB of memory (haven't decided how much yet)
- Corsair 550D case
- 3 Noctua NF-P12 case fans

Given the above, which Seasonic X-series would people recommend?
 
gevorg

gevorg

Diamond Member
Nov 3, 2004
5,070
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X-650, but if the price difference is small (i.e. X-650 is not on sale), just go with X-750
 
lehtv

lehtv

Elite Member
Dec 8, 2010
11,897
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X650 (X660) and X750 (X760) are both overkill for 2600K + 7970. If you're intending to leave room for crossfire, which doesn't really make sense as you want to keep the system quiet, then X-750 could be justified. For a single gpu setup, go with X560
 
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Salamander

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Feb 24, 2002
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lehtv said:
X650 (X660) and X750 (X760) are both overkill for 2600K + 7970. If you're intending to leave room for crossfire, which doesn't really make sense as you want to keep the system quiet, then X-750 could be justified. For a single gpu setup, go with X560
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How about if I plan on overclocking?
 
lehtv

lehtv

Elite Member
Dec 8, 2010
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http://www.guru3d.com/article/radeon-hd-7970-crossfire-review/7

Radeon HD 7970 - On your average system the card requires you to have a 550 Watt power supply unit.

Radeon HD 7970 Crossfire - On your average system the cards require you to have a 750 Watt power supply unit as minimum.
Click to expand...
Now, X series are not average power supplies... so these estimates have a safety margin that doesn't really apply to X series. With moderate OC (requires only a small voltage increase), X-560 easily handles 2600K + 7970 and X-750 handles 2600K + 7970 CF.

If you were aiming for extreme overclocks with high voltage increases, you shouldn't be building a setup based around components specifically designed to be quiet like 550D and X series PSUs, so I'm assuming you only want to OC moderately.
 
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Salamander

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Feb 24, 2002
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lehtv said:
http://www.guru3d.com/article/radeon-hd-7970-crossfire-review/7

Now, X series are not average power supplies... so these estimates have a safety margin that doesn't really apply to X series. With moderate OC (requires only a small voltage increase), X-560 easily handles 2600K + 7970 and X-750 handles 2600K + 7970 CF.

If you were aiming for extreme overclocks with high voltage increases, you shouldn't be building a setup based around components specifically designed to be quiet like 550D and X series PSUs, so I'm assuming you only want to OC moderately.
Click to expand...

Yes, I will only OC moderately.
 
philipma1957

philipma1957

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Jan 8, 2012
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if you get the x750 the psu fan will not turn on most of the time, thus a queiter build. it will cost a bit more on your power bill and a bit more up front. the 560 turns the fan up around 280 watts the 750 turns the fan up around 375 watts. mind you the fan is pretty quiet even when turned on.
 
lehtv

lehtv

Elite Member
Dec 8, 2010
11,897
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philipma1957 said:
it will cost a bit more on your power bill
Click to expand...

While that's technically true, it's probably worth mentioning that the difference is so insignificant that it can be ignored

the 560 turns the fan up around 280 watts the 750 turns the fan up around 375 watts. mind you the fan is pretty quiet even when turned on.
Click to expand...

Yep, the PSU fan noise will be easily drowned by other fans in the PC
 
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Suspicious-Teach8788

Lifer
Feb 19, 2001
20,155
23
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feel free to look at Corsair's AX650/750/850 series also. They're based on Seasonic's X-series, so its the exact same components. Sometimes you might get a better deal. I think 650W is enough, but I'd probably go 750W for futureproofing.
 
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TemjinGold

Diamond Member
Dec 16, 2006
3,050
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People need to stop this "futureproofing" junk.

OP - If you don't ever plan to CF/SLI (and you will know if you do), then don't waste your money on an X-750. Newer architectures are getting LESS power hungry, not more.
 
Soulkeeper

Soulkeeper

Diamond Member
Nov 23, 2001
6,739
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I'm happy with my fanless 400W X series so far
quality product.
Although i'd recommend a little higher capacity for your build (460 or 650), you don't need 700/800W psu's with the vast majority of modern systems.
 
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lehtv

lehtv

Elite Member
Dec 8, 2010
11,897
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I don't see the promo code on the newegg page. Where did you get it from?
 
_Rick_

_Rick_

Diamond Member
Apr 20, 2012
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birthdaymonkey said:
I say man up and get an X460! :D
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I say this is the way to go.

Actually, even the 400 would probably suffice
(CPU = 120W with OC, GPU = 250W with OC, leaves 30W (plenty!!) for other components)

The 460 may be ever so slightly more efficient under an extreme gaming load with full OC (or during burn in benchmarking), but the 400 slightly more efficient in idle. During normal gaming loads, there is probably no observable difference, with a projected ~300W power consumption.
Going to even 500W is probably only adding noise and increasing total energy consumption.
 
philipma1957

philipma1957

Golden Member
Jan 8, 2012
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Salamander said:
I noticed a number of reviews on the X-750 complain about the coil noise. How prevalent is it?
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tough call I have 2 both are good.

reviews are 240 5 star verified owners and 23 1 star verified owners.

10 great for every 1 terrible. pretty good stats.


the x650 is 24 1 star 275 5 star

11 to 1 a little better.

sale price 119 for the x750 no sale 139 for the x650 I would lean to the 750.



BTW the x660 I have is very good. you can find it for 131 at superbiiz


https://www.superbiiz.com/detail.php?name=PS-SS660KM

cost 146 code for 15 off is tribute net 131


below is the antec ea 650 114 use code tribute and it is 99 dollars .

I got a ea 450 and it runs well


the down side is not modular but darn good price and quiet

https://www.superbiiz.com/detail.php?name=PS-EA650P


thats all I got
 
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