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 Post subject: 750 watt power supply
PostPosted: Wed Oct 02, 2013 4:22 pm 
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Joined: Tue Sep 09, 2008 9:30 pm
Posts: 43
Location: FL
I was looking at the new Corsair RM750 and I was wondering if anyone has had any experience with it?

Here's my setup (only reason getting 750 instead of 650 is it's only $10 more):

HARDWARE

CPU: Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
http://www.newegg.com/Product/Product.aspx?Item=N82E16819116504

Motherboard: ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131821

Video Card: EVGA GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card 02G-P4-2678-KR
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130787

Hard Drive: Western Digital Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD1002FAEX
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136533

CPU Cooler: COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel 2011/1366/1155 and AMD FM1/AM3+
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099

SSD Hard Drive: Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
http://www.newegg.com/Product/Product.aspx?Item=20-148-442

Memory: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model CML8GX3M2A1600C9
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233186

Optical Drive: Lite-On LightScribe 24X SATA DVD+/-RW Dual Layer Drive IHAS424-98 - Retail (Black)
http://www.newegg.com/Product/Product.aspx?Item=N82E16827106335

Monitor: Dell UltraSharp U2412M Black IPS Panel 24" 8ms Pivot, Swivel & Height Adjustable LED Backlight Widescreen LCD Monitor 300 cd/m2 DC 2,000,000:1 (1000:1) http://www.newegg.com/Product/Product.aspx?Item=N82E16824260047

Speaker: DELL UltraSharp and Professional Series 468-7412 10 W 2.0 AX510 Flat Panel Stereo SoundBar http://www.newegg.com/Product/Product.aspx?Item=N82E16836260002&Tpk=Dell%20AX510

Case: Fractal Design Define R4 Black Pearl w/ USB 3.0 ATX Mid Tower Silent PC Computer Case
http://www.newegg.com/Product/Product.aspx?Item=N82E16811352020

Sound Card: ASUS Xonar DX 7.1 Channels 24-bit 192KHz PCI Express x1 Interface Sound Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16829132006

Power Supply: ?

Head Phones: Sennheiser HD 558 Headphones
http://www.newegg.com/Product/Product.aspx?Item=N82E16826106515

SOFTWARE

Operating System: Windows 7 Home Premium
Productivity Suite: Office 2010 Home & Student Edition


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 Post subject: Re: 750 watt power supply
PostPosted: Wed Oct 02, 2013 4:37 pm 
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Joined: Tue Nov 02, 2004 12:22 pm
Posts: 2031
Location: Guatemala
Your setup should be fine even with 550W, my bet is wont even reach 400W on load. I would give a shot to the new Corsair RM series,

CORSAIR RM Series RM650 $120
CORSAIR RM Series RM750 $130

Or if you have a bigger budget and want platinum cert,

Seasonic SS-660XP2 $150
Seasonic SS-760XP2 $170

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 Post subject: Re: 750 watt power supply
PostPosted: Wed Oct 02, 2013 8:30 pm 
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Joined: Thu Oct 06, 2005 4:36 am
Posts: 4737
Location: Monterey Bay, CA
majax79 wrote:
I was looking at the new Corsair RM750 and I was wondering if anyone has had any experience with it?


Not yet. It was just released a few weeks ago with first reviews last week.

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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 03, 2013 12:25 am 
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Joined: Wed Jun 13, 2007 10:12 am
Posts: 3232
Location: ITALY
Abula wrote:
Your setup should be fine even with 550W, my bet is wont even reach 400W on load.

More probably that not, such a system should pull from the PSU 190-250W at most (to which you may add another 30W for oc'ing, if you mind).

Definitely something like a Seasonic P400FL2 would be better suited, and at least in Europe, noticeably cheaper (not to mention it should be a far better PSU than a Corsair RM 750, electrically).

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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 03, 2013 12:59 am 
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Posts: 573
Location: de_DE
quest_for_silence wrote:
Definitely something like a Seasonic P400FL2 would be better suited, and at least in Europe, noticeably cheaper (not to mention it should be a far better PSU than a Corsair RM 750, electrically).

The 400FL only has one 6/8 PCIe power connector and more powerful graphic cards need two. Seasonic makes an extra cable, but not even the german distributor knows about it much less can get it for you. That's why for my current setup (3570K/670GTX) I bought the 460FL, because it has two PCIe connectors.

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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 03, 2013 3:23 am 
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Location: ITALY
boost wrote:
The 400FL only has one 6/8 PCIe power connector and more powerful graphic cards need two. Seasonic makes an extra cable, but not even the german distributor knows about it much less can get it for you. That's why for my current setup (3570K/670GTX) I bought the 460FL, because it has two PCIe connectors.


Thanks for the clarification, boost: at any rate, being single rail for the 12V, probably a generic dual LP4 molex to 8pin PCIe adapter - even using both the two bundled peripheral cables - should work well (and let you spare about 20-30 bucks), shouldn't it?

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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 03, 2013 4:44 am 
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boost wrote:
The 400FL only has one 6/8 PCIe power connector and more powerful graphic cards need two. Seasonic makes an extra cable, but not even the german distributor knows about it much less can get it for you. That's why for my current setup (3570K/670GTX) I bought the 460FL, because it has two PCIe connectors.

I've built a system with a HD7970 powered with a G-360. Only one 6p PCIe power connector, had to use a 2 x molex to 8p PCIe power adapter. Full load is a bit north of 300W, but it's a 360W quality PSU. Works fine but nowhere near quiet of course. :)

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Gaming: Intel DH77EB | i5-3570K | GTX 750 Ti | 16GB DDR3 | Intel 520 120GB | TJ08-E | G-360 360W
Server: Intel DH77DF | i3-2100T | 4TB+3x3TB | picoPSU | Idle 24W AC


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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 03, 2013 6:06 am 
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Location: ITALY
Vicotnik wrote:
Works fine but nowhere near quiet of course. :)

But that's that PSU, Vicotnik, not its wattage! :)

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 Post subject: Re: 750 watt power supply
PostPosted: Fri Oct 04, 2013 8:43 am 
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Joined: Wed Jul 12, 2006 10:29 am
Posts: 573
Location: de_DE
quest_for_silence wrote:
boost wrote:
The 400FL only has one 6/8 PCIe power connector and more powerful graphic cards need two. Seasonic makes an extra cable, but not even the german distributor knows about it much less can get it for you. That's why for my current setup (3570K/670GTX) I bought the 460FL, because it has two PCIe connectors.


Thanks for the clarification, boost: at any rate, being single rail for the 12V, probably a generic dual LP4 molex to 8pin PCIe adapter - even using both the two bundled peripheral cables - should work well (and let you spare about 20-30 bucks), shouldn't it?

I don't trust adapters for higher loads so I bought the PSU that has all the cables I need. The price difference was 12€ (I think) same as for a spare cable or some adapters.

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 Post subject: Re: 750 watt power supply
PostPosted: Fri Oct 04, 2013 10:11 am 
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Posts: 3232
Location: ITALY
boost wrote:
I don't trust adapters for higher loads

Just for the sake of talking, those adapters are made of the same cables used by Seasonic or other premium brand manufacturer; I've used four of them to power two GTX 460 with a 350W Enermax PSU for almost a year without any browning/blackening on the molex connector: this latter should have a 11A per pin current rating, so any Y adapter should carry more than 250W (I guess enough for any modern high end single GPU card).

Anyway when the difference is as small as you paid, there's a very little convenience to use them: here in Italy the P460FL comes usually at about 30% more than a P400FL, so it may worth.

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 Post subject: Re: 750 watt power supply
PostPosted: Fri Oct 04, 2013 1:52 pm 
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Posts: 1243
Location: UK
Just because you can hook up a connector does not mean it will 100% work. It probably will for a card that you might have but it wouldn't be safe to use with any given card as a higher power card might push it over the edge. PSU manufacturers will take this into account when speccing up connectors that they put on a PSU. For example unless they can guarantee being able to supply a full 150W down the line, they won't put 2x6-pin PCI-E connectors on. It might still work with an adaptor but your mileage may vary as they will not guarantee it.

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 Post subject: Re: 750 watt power supply
PostPosted: Fri Oct 04, 2013 9:26 pm 
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Posts: 3232
Location: ITALY
edh wrote:
Just because you can hook up a connector does not mean it will 100% work. It probably will for a card that you might have but it wouldn't be safe to use with any given card as a higher power card might push it over the edge. PSU manufacturers will take this into account when speccing up connectors that they put on a PSU. For example unless they can guarantee being able to supply a full 150W down the line, they won't put 2x6-pin PCI-E connectors on. It might still work with an adaptor but your mileage may vary as they will not guarantee it.


I'm not sure of what you are saying (maybe due to my limited english), but you're welcome.

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 Post subject: Re: 750 watt power supply
PostPosted: Sat Oct 05, 2013 12:05 am 
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edh wrote:
Just because you can hook up a connector does not mean it will 100% work. It probably will for a card that you might have but it wouldn't be safe to use with any given card as a higher power card might push it over the edge. PSU manufacturers will take this into account when speccing up connectors that they put on a PSU. For example unless they can guarantee being able to supply a full 150W down the line, they won't put 2x6-pin PCI-E connectors on. It might still work with an adaptor but your mileage may vary as they will not guarantee it.

This is not rocket science. As long as one has a basic understanding of electricity, the use of adapters are safe. It's mainly making sure the wires can handle it. Come on people, are we creating beautiful systems or are we following IKEA assembly instructions? ;)

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 Post subject: Re: 750 watt power supply
PostPosted: Thu Oct 31, 2013 5:36 pm 
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Location: FL
Thanks for the information. I ended up selecting the 760(SS-760XP2).


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