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Need helping picking correct power supply, good enough for gaming?

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July 31, 2011 7:58:10 PM

This is the build I made on ebuyer:

Samsung HD103SJ Spinpoint F3 1TB Hard Drive SATAII 7200rpm 32MB Cache

AMD Phenom II X4 955 Black Edition Socket AM3 3.2 GHz 6MB L3 Cache Retail Boxed Processor

G-Skill 8GB (2x4GB) DDR3 1600Mhz RipjawsX Memory Kit CL9 (9-9-9-24) 1.5V

Asus M4A88T-V EVO/USB3 880G Socket AM3 Onboard 128MB Memory DVI VGA HDMI Out ATX Motherboard

Samsung SH-B123L 12x BD-ROM DVD±RW DL & RAM Lightscribe SATA Optical Drive - Retail Box Black

XFX HD 6870 Black Edition 1GB DDR5 Dual DVI HDMI DisplayPort PCI-E Graphics Card

Tenda Wireless-N300 PCI Adapter

Casecom 6788 Black Mid Tower Case with Full Black Interior/Exterior 120mm Blue LED Front Fan - No PSU

CIT 850W Black Edition PSU 12cm Dual 12v CE PFC Model 850UB

Total Price: £528.35

I allready have a monitor and all the other accessories like keyboard, mouse, speakers etc

For starters, is it a good build? If so is the 850w Power supply good enough, thanks :) 
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August 1, 2011 12:13:45 AM

Okay thanks :)  Reckon everything else is okay? tbh I think I'll need at least 635w the graphics card requires at least 500w and the takes up 125w and the hard drive 5w. Plus I have speakers connected, external hard drive and other components, am I doing something wrong, surely I need at least 700 possibly even 750!? Sorry I'm new to this please someone help :) 
August 1, 2011 12:46:05 AM

Ohhh, important thing to learn: How to read graphics recommended power requirements.

They are for the system as a whole, not for the graphics card alone, a 6870 only uses about 150W itself, the 500W recommendation is for it, a 140W CPU, a few drives, and some overheat to allow for marginal PSUs, it does not use 500W itself.
August 1, 2011 5:48:48 AM

You cannot go wrong with corsair or seasonic psus. Most antec psu's are great. The other brands are hit or miss. Check out psu reviews at jonnyguru

I'm going to recommend a great PSU to you but it's not cheap:
HX850
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Even better:
Corsair 850AX
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Here is one of the best 750W PSU, 750HX:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If you can afford them, I would buy them for the following reaons:
1) All the rails are stable with very little ripple
2) Efficient so less wasted wattage
3) Quiet! Many of the fans on these PSUs will not even turn on below 20% load and because they are so efficient, that is not often...
4) They are Corsair PSUs...
August 1, 2011 5:55:53 AM

chillin15 said:
You cannot go wrong with corsair or seasonic psus. Most antec psu's are great. The other brands are hit or miss. Check out psu reviews at jonnyguru

I'm going to recommend a great PSU to you but it's not cheap:
HX850
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Even better:
Corsair 850AX
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Here is one of the best 750W PSU, 750HX:
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

If you can afford them, I would buy them for the following reaons:
1) All the rails are stable with very little ripple
2) Efficient so less wasted wattage
3) Quiet! Many of the fans on these PSUs will not even turn on below 20% load and because they are so efficient, that is not often...
4) They are Corsair PSUs...
Why would he need so much power to run a single HD6870? Even a 500W form any one of those brands is plenty. If he's going to spend so much, better off sticking with a $60 PSU (like the one I posted) and upping the graphics to a GTX560Ti for the extra $50.

Not saying they are bad products - on the contrary, but significantly overkill for the requirement and budget.
August 1, 2011 6:04:26 AM

sli/cf in the future would not be able to run on anything but at least a 750W supply.

In any case, I would suggest at least a 650W if you never plan to sli/cf. What is the original OP's budget? I didn't see it. He had a total price of al his components but I didn;t see a budget.
August 1, 2011 11:46:38 AM

I don't really want to spend anymore than I have unless I can get a significant performance increase to justify paying a little bit more but i'm more than happy with what I'm getting with the 6870 and I can't see myself getting much of a boost if I were to buy a better processor.

I'll probably go with one of the 650w power supplies someone mentioned but I'm probably going to sound stupid saying this, I have 6 usb devices plugged in at all times and this will increase to maybe 8 and I am thinking of filling all the slots for fans in the case to keep things extra cool. Sure I don't need any more power?

Plus anyone know any nice looking budget cases with good cable management, I don't mind paying a little more if it will last me in the long run, not too expensive please o and only links from ebuyer as that's the only place I'm getting my stuff from. Thanks again everyone :) 
August 1, 2011 11:48:07 AM

O and finally please keep the power supply price under £60 if that's possible thanks again :) 
August 1, 2011 1:12:46 PM

While the CM690 II is nice, the GX 650 is not. You wont find a good power supply for under 60, and most of the units you do will need to be replaced down the line costing you more money.

As for the concern about USB devices, each port provides 500mA at 5V, about 2.50W max, you would need a lot of USB devices to add up to anything significant, fans are about 5-10W max, again you need a lot to add up to anything significant.
August 1, 2011 3:41:58 PM

The motherboard (Asus M4A88T-V Evo) does have two PCIe slots, but the second one is x4, so IMO is too slow to be worthwhile adding a second graphics card into. Thus it is somewhat pointless talking about PSUs that can support multiple cards, thus 550W is fine and I've already suggested two perfectly good PSUs around the £60 mark.

Fans don't add that much to power requirements either.

Fractal Design Core 3000 £53
http://www.ebuyer.com/270598-fractal-design-core-3000-c...

Cooler Master HAF 912 Plus £68
http://www.ebuyer.com/239757-coolermaster-haf-912-plus-...

Cougar Evolution 6GR1 £70
http://www.ebuyer.com/273186-cougar-6gr1-evolution-case...
August 1, 2011 4:22:16 PM

tygk said:
I don't really want to spend anymore than I have unless I can get a significant performance increase to justify paying a little bit more but i'm more than happy with what I'm getting with the 6870 and I can't see myself getting much of a boost if I were to buy a better processor.

I'll probably go with one of the 650w power supplies someone mentioned but I'm probably going to sound stupid saying this, I have 6 usb devices plugged in at all times and this will increase to maybe 8 and I am thinking of filling all the slots for fans in the case to keep things extra cool. Sure I don't need any more power?

Plus anyone know any nice looking budget cases with good cable management, I don't mind paying a little more if it will last me in the long run, not too expensive please o and only links from ebuyer as that's the only place I'm getting my stuff from. Thanks again everyone :) 


Jonnyguru, the God of PSU knowledge, recommends this site to determine how much PSU power you need:
http://www.extreme.outervision.com/PSUEngine

I personally use 30% capacity aging, 100% system load, fill in your desired OC amount and your whole setup. For OC - 4000MHZ = 4GHZ etc.

Come back.
August 1, 2011 7:10:49 PM

30% capacitor aging is ridiculous for any decent unit running 105C caps, it would take 10-15 years for that. 10% gives you a large overhead on what you actually need and is more realistic for keeping a unit 5-10 years, and most good units were already overbuilt so i usually stick with 0% capacitor aging then then pick a unit with some padding added on, adding capacitor aging to begin with gives you an unrealistically high number.

Also, dont go tying sites to people who dont tie themselves to them, i have never seen jonny recommend that site, and on some occasions he is against it, its a reference tool and just like any other tool you need to know how to use it to get good results.
http://www.jonnyguru.com/forums/showthread.php?t=1783
August 1, 2011 7:18:59 PM

As far as capacitor aging goes...how do you know the quality of the capacitors? Do you take apart the PSU to check the capacitors? I don't trust manufacturers to ALWAYS sell me quality stuff so why not account for that?

There's a higher chance you will get quality stuff from corsair, seasonic, antec, but even with them - you never know.

Why can't we be safe rather than sorry?
!