Big enough PSU

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Hello all,

Have to place an order in next hour, a little help would be great.

Kingston 4GB (2x2GB) DDR3 1333MHz i5 Memory Kit CL9 1.5V
Antec ISK 310 - 150 Mini ITX Case - With 150W PSU
Intel Core i3 540 3.06GHz Socket 1156 4MB L3 Cache Retail Box Processor Gigabyte GA-H55N-USB3 H55 Socket 1156 DVI VGA HDMI Out 8 Channel Audio M-ITX Motherboard
Western Digital WD1600BEVT 160GB 2.5" Hard Drive SATAII 5400rpm 8MB Cache - OEM Scorpio Blue
Sony Optiarc AD-7703S 8x DVD±RW DL & RAM with Labelflash SATA Slimline Optical Drive - OEM Black
ASUS HD 5550 1GB DDR3 DVI VGA HDMI Out PCI-E Low Profile Graphics Card

Is that Antec 150W powerful enough for the above? Would a 5450 be a better option?
Its aimed at running CS5 premier and photoshop for a school on a very tight budget.

Cheers
 
150W PSUs are designed for *extremely* low-load and low-power PCs- we're thinking Intel Atoms running Ubuntu here. So no, the answer is "not a hope in hell will that PSU run that system".

Read 95thrifles' Guide to helping you choose your components, or, if you're in a hurry, just get the budget AMD build. You can afford to downgrade the GPU on that as you won't be gaming.
 
PSU calculator recommends a 200W+ PSU and that even with a 5450 you'd be using 162W at max load.
 
Actually, a 150w PSU would easily work in that system, the CPU consumes 73w at complete maximum, much less at general load or idle. The HDD, disc drive and RAM etc consume about 10-15w each, the 5550 consumes 40w at complete maximum, again, much less at idle or general load.

Yes it will work, I would eastimate you'll idle at about 40w and load at about 100w general load.


150W PSUs are designed for *extremely* low-load and low-power PCs- we're thinking Intel Atoms running Ubuntu here. So no, the answer is "not a hope in hell will that PSU run that system".

Rubbish, you are way overspeccing the amount of power needed.

PSU calculator recommends a 200W+ PSU and that even with a 5450 you'd be using 162W at max load.

PSU calculators are inaccurate piles of trash.
 
Did realise I was asking a lot, I've seen others use it without the graphics. A well.

Think I'm going with Antec NSK1480 Slim Mini Desktop Case - With 350W 80+ and a m-atx motherboard instead.

Cheers
 
Actually, a 150w PSU would easily work in that system, the CPU consumes 73w at complete maximum, much less at general load or idle. The HDD, disc drive and RAM etc consume about 10-15w each, the 5550 consumes 40w at complete maximum, again, much less at idle or general load.

Yes it will work, I would eastimate you'll idle at about 40w and load at about 100w general load.

Rubbish, you are way overspeccing the amount of power needed.

PSU calculators are inaccurate piles of trash.

Three key points here:

1. The big number at the top where it says 150W is NOT how much power it is capable of supplying. A decent-standard PSU can manage 80% efficiency at load (so you'd get 120W), but you'll be lucky to get that much out of a PSU incorporated into a case.

2. We all deliberately overspec the amount of power needed because one day, photoshop will randomly go into overdrive, or windows will have a fit, or the planets will align somehow, and your computer will push to absolute maximum load. When it does, that 150W PSU (that I'm doubting will even provide 120W) will not be enough- even with your figures- at maximum load, and the computer will go BANG. Looking at typical load when choosing your PSU is a really, really bad idea.

3. Getting extra wattage on your PSU is cheap as chips these days and spending an extra few pounds to prevent your several-hundred-pound machine exploding is obviously a good idea.
 
Three key points here:

1. The big number at the top where it says 150W is NOT how much power it is capable of supplying. A decent-standard PSU can manage 80% efficiency at load (so you'd get 120W), but you'll be lucky to get that much out of a PSU incorporated into a case.

2. We all deliberately overspec the amount of power needed because one day, photoshop will randomly go into overdrive, or windows will have a fit, or the planets will align somehow, and your computer will push to absolute maximum load. When it does, that 150W PSU (that I'm doubting will even provide 120W) will not be enough- even with your figures- at maximum load, and the computer will go BANG. Looking at typical load when choosing your PSU is a really, really bad idea.

3. Getting extra wattage on your PSU is cheap as chips these days and spending an extra few pounds to prevent your several-hundred-pound machine exploding is obviously a good idea.

1. Incorrect, you have it the wrong way round, a 150w PSU should be able to supply 150w, but because it is 80% efficient, it wastes 20% of that electricity as heat, so a 150W at max load would take 180w from the wall socket.

2. No.

3. I'm not sure if the OP has many options.
 
Thanks for the replies guys, I've built many PCs before and am aware how PSUs work (I'd agree on ATIor..) Anyway, was in a bit of a rush and not thinking clearly so just needed someone to help clear my head.
As it was I was told it had to be SFF or as near as possible and under £400, which limited what could get quite a lot. I'd seen others using the i3 in that case before which is why I went with it, maybe the dedicated card was pushing my luck - now we'll never know.

After a coffee and a down pour of rain I came up with another cheaper solution for a temporary fix which gives us more time to plan.

Anyway thanks again

Guy
 
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