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PSU worries

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Name: Straydog
Date: November 2, 2009 at 06:26:24 Pacific
OS: Windows XP
Subcategory: General
Comment:

I recently placed a order for my new pc but im starting to worry about the PSU i took, i dont know if its enough. Also i'll be gaming with this rig.

Here is the system with the PSU

Core i5 2.66 GHz
Intel P55 "Whitesburg" LGA1156
Apacer DDR3 2gb x2 240-Pin DIMM, 1.5V
ATI Radeon 5750 1GB DDR5 or Geforce GT220 1GB
cooler master gladiator 600 case

PSU Coolermaster extreme power plus 460W, ATX 12V V2.3

Is the PSU good enough? and just out of interest is this a decent gaming rig? Also what can i do to get this cheaper but still keep max gaming performance for the ATI Radeon 5700 series?



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Response Number 1
Name: jam
Date: November 2, 2009 at 07:18:11 Pacific
Reply:

Intel boards generally have limited BIOS options...I highly suggest you choose a different motherboard.

P55 On A Budget: Five Core i5/i7 Motherboards For $100-$150

As for the PSU, wattage isn't the most important consideration - amperage is. Assuming this PSU is the one you're asking about, you may wanna reconsider. It only has two +12v rails at 18A each & one of those is reserved for the CPU, so that means the rest of the system has only has 18A to work with. You'd be much better off getting a PSU that has a single +12v rail with high amperage.

READ: Are multiple 12-volt rails better than a single 12-volt rail?

The PSU is NOT the place to be cutting corners. Plan on spending about $75 +/- for something decent.

Did you do any research when selecting your video card choices? The Geforce GT220 1GB is an entry level gaming card which gets beaten by the Radeon HD4670 & Geforce 9600GT. The Radeon HD5750 is better than all the cards I just mentioned, but be aware that it takes up two slots.


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Response Number 2
Name: Straydog
Date: November 2, 2009 at 08:30:05 Pacific
Reply:

By to slots you mean 2 gpu spots such as sli / xfire?.
Im re-considering a intel mobo after what you said and now im looking into a ASUS p55 mobo.

Also i decided to change the psu as you suggested i reconsider, and im going for a 550W or a 650W, both being coolermasters and i couldnt find the amperage on them.

And im just going to stick to a radoen hd 5750 but please explain by what you mean when you say it takes up to slots, thnx :)

P.S the PSU you where looking at was spot on, it was the same one i was odering, good thing i asked them to stop building this pc in time.


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Response Number 3
Name: jam
Date: November 2, 2009 at 09:53:09 Pacific
Reply:

"im going for a 550W or a 650W, both being coolermasters and i couldnt find the amperage on them"

I don't know if Cooler Master makes PSU's with a single +12v rail. Have a look at what Corsair has to offer. The following 550W unit has 41A on a single +12v rail:

http://www.newegg.com/Product/Produ...

"please explain by what you mean when you say it takes up to slots"

All you have to do is look at a pic of one:

http://high-tech.portail.free.fr/in...

The card is so big that it takes up two slots in the rear of the case. And if there's a PCIe x1 or standard PCI slot right next to the PCIe x16 slot, the card will block that slot from being used.


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Response Number 4
Name: kuwese
Date: November 2, 2009 at 21:54:14 Pacific
Reply:

if u check crysis and farcry 2 benchmark u will see hd 4870 is better card than hd 5750. http://www.tomshardware.com/reviews...


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Response Number 5
Name: Straydog
Date: November 3, 2009 at 07:56:32 Pacific
Reply:

thanks Jam for the Response and i understand now what you
mean by 2 slots, as for Kuwese, where i stay the hd 4870 is
actually more expensive than the 5750 which brings me to
another question.

I can get the hd 4870 in a normal quad core build (being the
Q8400) and the mobo will be a G31 which i heard is not that
good, they dont sell p45 boards here, any reason to that i
wont know of :P. but anyway in the build which has the 5750
it will be the above mentioned specs in my first post

now will i get a decent - big peformance jump with the i5 and
Asus board with the 5750 in gaming? or does the Q8400 with
a G31 and 4870 peform just as well if not better in gaming?

one last thing why does no one say anything good about the
G31 boards? what so bad about them besides the fact that its
oldish tech?


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Response Number 6
Name: kuwese
Date: November 3, 2009 at 08:30:40 Pacific
Reply:

U better stick with core i5 system, and u can overclock your card(hd 5750) to reach perfomance of hd 4870.


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Response Number 7
Name: jam
Date: November 3, 2009 at 14:04:16 Pacific
Reply:

"one last thing why does no one say anything good about the G31 boards?"

Because the G31 northbridge chipset is over 2 years old & it's always paired up with the ICH7 southbridge chip which is over 4 years old. You're basically building a 2006 system but with an updated CPU. If that's what you want, save yourself some money & buy a used system, then upgrade the processor yourself.

You should be looking into P43 or P45 boards. If you want integrated video, look at the G43 or G45. If the place you're dealing with can't get modern hardware, shop elsewhere.


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Response Number 8
Name: Kilo Bravo
Date: November 7, 2009 at 21:35:28 Pacific
Reply:

Single vs. multi-rail is a case-by-case basis. I own several single rail, and many more multi-rail PSUs. There are distinct advantages and disadvantages to each.

Also take note that PCP&C's claim that maximum amperage per rail is 20A is not fact. Some power supplies do not have to conform to 20A standards called for by safety standard organizations.

Now while jam has been leaning toward single-rails (he's given few advantages of single-rail and a disadvantage of multi-rail), you must also be forewarned of the downside to single-rails and the upside to multi-rails.

A single-rail with high current can and will suffice large power transfer requirements, but unlike its multi-rail cousins, is much more prone to power fluctuations and instability. This is because ALL of the power is transferred across that very rail, and a single spike will affect all connected to that rail. That includes everything from a brand new quad core processor to one wayward, subpar case fan.

A multi-rail can allow you to isolate the risk to separate rails, leaving more important components in dedicated rails. Take note that the risk is basically unavoidable. When a power spike has to happen, it will. Be forewarned.

A single-rail's high-cost could cost you more if you do not take proper precautions to shield your power source with surge protection and automatic voltage regulation.

Multi-rails are much more stable, but unlike their pricier cousins, they cannot provide a substantial amount of power through a single rail.

You have to subdivide your components into separate rails providing each with its dedicated power. There is waste of power if not all of the current is consumed, but the smaller amperage will keep power transfer component stress at manageable proportions.

Again, take care in your decision. Your setup will work with sufficient current supplied on a single or multi-rail PSU, but the consequences of doing so change a lot when you start upgrading.


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