[SOLVED] CM real power 460 or Corsair VX450 ??

aj_2007 · 07-09-2009, 04:10 AM

I am confused between these two PSUs

CM has 80+ bronze rating.But, it has two 12V rails of 18A each.I feel one 12V rail will be better for me as I might get a radeon 4770(possibility).

whereas,corsair is much costlier and has less efficiency rating.But, it has a single 12V rail of 33A.

Which is the better of the two??
http://www.coolermaster.com/products...detail&id=5483
http://www.corsair.com/products/vx/default.aspx

My specs-
Intel C2Q q8200@2.33 Ghz no overclocking
Intel DG41TY mobo
2 Gb ram kingston
320 Gb hard drive
DVD writer

aj_2007 · 07-09-2009, 04:16 AM

what are the advantages/disadvantages of PSUs with 2 12V rails??
Can anyone clear my this doubt too??

Tumbleweed36 · 07-09-2009, 04:52 AM

First of all, let me say to you from your comment contained in the thread about getting a 4770 video card. You need a bare minimum of a 600 watt power supply and a 650 would be even better, because a 450 will not do the job with that video card.

Both power supplies are simply excellent, so with either of these models, you just can't go wrong. If this were my choice, I would choose the single rail supply because you are not splitting power needs between two rails. A read of this from PC Power & Cooling might help you to understand the difference:

Quote:

Originally Posted by PC Power & Cooling

Here are the facts: A large, single 12-volt rail (without a 240VA limit) can transfer 100% of the 12-volt output from the PSU to the computer, while a multi-rail 12-volt design has distribution losses of up to 30% of the power supply's rating. Those losses occur because power literally gets “trapped" on under-utilized rails. For example, if the 12-volt rail that powers the CPU is rated for 17 amps and the CPU only uses 7A, the remaining 10A is unusable, since it is isolated from the rest of the system.

Hope this helps!

aj_2007 · 07-09-2009, 06:04 AM

OK
but can't I overdraw power from the PSU
like the CM460 says that it has a max of 550W output.

I think the max my PC under full load can go is 500 W.
so, CM460 will be a good choice.
Im not going to do any overclocking no future crossfire plans.NOTHING.
For same price I can get CM extreme power 600W,but it's not reliable and has just 2 years warranty.

wouldn't it be wise for me to get 460W ?

Tumbleweed36 · 07-09-2009, 06:50 AM

Absolutely not, don't buy an underpowered power supply. That would be a major mistake on your part with a nice rig.

If the supply you are looking at might even run it, you stand a very good chance of having "tearing, lines across the screen, shadowing, slower performance, etc." and all those normal symptoms of an underpowered video card. Then, you have to redo the power supply again to get it to perform the way it is supposed to. The cost difference between what you are looking at and a higher powered supply is minimal when you eliminate those headaches we are discussing with poor performance.

Major video card manufacturers are know (well documented in the PC reviews) to understate their power needs to sell more video cards. Don't fall in to that trap and buy something that is not adequate.

Here is what you need:

http://www.newegg.com/Product/Produc...82E16817139005

BTW, that coolermaster 600 you mentioned is NOT a good power supply, even if the same price as the one you listed.

Where are you from if not in the US, maybe we can help you locate a good price on a decent sized supply?

aj_2007 · 07-10-2009, 05:41 AM

@Tumbleweed36
none of the online powersupply calculators I ran showed my system wattage to be more that 350W.
I think even if we don't believe in them and add up a 100 Watts more,that would make it 450W,that's still in our range.

Tumbleweed36 · 07-10-2009, 07:49 AM

I don't know of one tech, mentor, moderator, or manager on here who would suggest you run it with that small of a power supply. However, that has to be your choice and I can almost guarantee you will be back soon with problems related to low power.

You might take a read of this:

Video card quick list

**Tyree** · 07-10-2009, 08:18 AM

Hers an alternative to the $100 Corsair.
SeaSonic 650W $95 w/shipping.
http://www.newegg.com/Product/Produc...82E16817151036

Tumbleweed36 · 07-10-2009, 10:35 AM

Quote:

Originally Posted by Tyree

Hers an alternative to the $100 Corsair.
SeaSonic 650W $95 w/shipping.
http://www.newegg.com/Product/Produc...82E16817151036

I like that even better. Seasonic is the only power supply I use in my personal computers....love the lack of noise and that is a great price on a power supply that normally costs much more.

aj_2007 · 07-11-2009, 09:35 AM

Okay guys just to tell you,
I've just bought Corsair 550VX and is running fine,Graphic card is yet to be bought as its outa stock.

now is this PSU okay??as the video card chart also suggested to get a min 550W PSU.

Tumbleweed36 · 07-11-2009, 09:37 AM

That is a strong PSU, so should work for you if you don't get too many add-on things or you don't overclock. Let us know when you get the video card if everything is O.K.

aj_2007 · 07-11-2009, 09:45 AM

Sure Sure. I will tell you.
Thanks.

07-09-2009, 04:10 AM	#1 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	[SOLVED] CM real power 460 or Corsair VX450 ?? I am confused between these two PSUs CM has 80+ bronze rating.But, it has two 12V rails of 18A each.I feel one 12V rail will be better for me as I might get a radeon 4770(possibility). whereas,corsair is much costlier and has less efficiency rating.But, it has a single 12V rail of 33A. Which is the better of the two?? http://www.coolermaster.com/products...detail&id=5483 http://www.corsair.com/products/vx/default.aspx My specs- Intel C2Q q8200@2.33 Ghz no overclocking Intel DG41TY mobo 2 Gb ram kingston 320 Gb hard drive DVD writer

07-09-2009, 04:16 AM	#2 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	Re: CM real power 460 or Corsair VX450 ?? what are the advantages/disadvantages of PSUs with 2 12V rails?? Can anyone clear my this doubt too??

07-09-2009, 06:04 AM	#4 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	Re: CM real power 460 or Corsair VX450 ?? OK but can't I overdraw power from the PSU like the CM460 says that it has a max of 550W output. I think the max my PC under full load can go is 500 W. so, CM460 will be a good choice. Im not going to do any overclocking no future crossfire plans.NOTHING. For same price I can get CM extreme power 600W,but it's not reliable and has just 2 years warranty. wouldn't it be wise for me to get 460W ?

07-09-2009, 06:50 AM	#5 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 19,677 OS: XP Professional	Re: CM real power 460 or Corsair VX450 ?? Absolutely not, don't buy an underpowered power supply. That would be a major mistake on your part with a nice rig. If the supply you are looking at might even run it, you stand a very good chance of having "tearing, lines across the screen, shadowing, slower performance, etc." and all those normal symptoms of an underpowered video card. Then, you have to redo the power supply again to get it to perform the way it is supposed to. The cost difference between what you are looking at and a higher powered supply is minimal when you eliminate those headaches we are discussing with poor performance. Major video card manufacturers are know (well documented in the PC reviews) to understate their power needs to sell more video cards. Don't fall in to that trap and buy something that is not adequate. Here is what you need: http://www.newegg.com/Product/Produc...82E16817139005 BTW, that coolermaster 600 you mentioned is NOT a good power supply, even if the same price as the one you listed. Where are you from if not in the US, maybe we can help you locate a good price on a decent sized supply? __________________ ---------- I don't receive email notifications of replies to subscribed threads. (Internet provider policy) Therefore, if I don't respond to your post within 24 hours, please send me a reminder PM and include the link to your thread. Last edited by Tumbleweed36; 07-09-2009 at 06:55 AM.

07-10-2009, 05:41 AM	#6 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	Re: CM real power 460 or Corsair VX450 ?? @Tumbleweed36 none of the online powersupply calculators I ran showed my system wattage to be more that 350W. I think even if we don't believe in them and add up a 100 Watts more,that would make it 450W,that's still in our range.

07-10-2009, 07:49 AM	#7 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 19,677 OS: XP Professional	Re: CM real power 460 or Corsair VX450 ?? I don't know of one tech, mentor, moderator, or manager on here who would suggest you run it with that small of a power supply. However, that has to be your choice and I can almost guarantee you will be back soon with problems related to low power. You might take a read of this: Video card quick list __________________ ---------- I don't receive email notifications of replies to subscribed threads. (Internet provider policy) Therefore, if I don't respond to your post within 24 hours, please send me a reminder PM and include the link to your thread.

07-10-2009, 08:18 AM	#8 (permalink)
Tyree Mentor Hardware Team Join Date: May 2009 Location: Illinois Posts: 5,719 OS: XP Pro-7RC-Mandriva My System	Re: CM real power 460 or Corsair VX450 ?? Hers an alternative to the $100 Corsair. SeaSonic 650W $95 w/shipping. http://www.newegg.com/Product/Produc...82E16817151036 __________________ Posting your PC specs will help us to help you quicker and more efficiently.

07-11-2009, 09:35 AM	#10 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	Re: CM real power 460 or Corsair VX450 ?? Okay guys just to tell you, I've just bought Corsair 550VX and is running fine,Graphic card is yet to be bought as its outa stock. now is this PSU okay??as the video card chart also suggested to get a min 550W PSU.

07-11-2009, 09:37 AM	#11 (permalink)
Tumbleweed36 Asst Manager Hardware Join Date: May 2005 Location: USA Posts: 19,677 OS: XP Professional	Re: CM real power 460 or Corsair VX450 ?? That is a strong PSU, so should work for you if you don't get too many add-on things or you don't overclock. Let us know when you get the video card if everything is O.K. __________________ ---------- I don't receive email notifications of replies to subscribed threads. (Internet provider policy) Therefore, if I don't respond to your post within 24 hours, please send me a reminder PM and include the link to your thread. Last edited by Tumbleweed36; 07-11-2009 at 09:38 AM.

07-11-2009, 09:45 AM	#12 (permalink)
aj_2007 Registered User Join Date: Jun 2007 Posts: 138 OS: XP SP2 My System	Re: CM real power 460 or Corsair VX450 ?? Sure Sure. I will tell you. Thanks.