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What is the exact power supply required by the individual components of my system?

Tags:
  • Core
  • Power Supplies
  • Components
  • RAM
  • CPUs
  • Systems
  • Motherboards
Last response: in Systems
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March 13, 2014 11:42:08 PM

my cpu specs-
core 2 duo 2.93 ghz
3 gb ram
motherboard is 0K83V0
500 gb hard disk
intel g45/g43 chipset
cd/dvd player
pls provide me about the power supply required by each of the components i mentioned above.I need the information so that i can determine the best psu under my budget.

More about : exact power supply required individual components system

a c 94 ) Power supply
a c 88 à CPUs
a c 98 V Motherboard
March 13, 2014 11:51:43 PM

No video card? Draw will be less then 150W. Antec 380W green, or a seasonic 300/350W is what I'd get.
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March 13, 2014 11:53:15 PM

He wants individual wattage for individual Parts
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March 14, 2014 12:01:13 AM

thanks for answering but i want individual wattage.i am ok with approximate information.
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a c 94 ) Power supply
a c 88 à CPUs
a c 98 V Motherboard
March 14, 2014 7:52:02 AM

I haven't seen individual power listings in quite awhile. Which is why I tack on 50W after CPU + GPU. Most of the power supply calculators should be able to give the data. The C2D power draw depends on the chip. 65-95W is possible. Ram is usually 2W a stick, drives are anywhere from 5-10W. Motherboards are where it gets tricky as I haven't seen any data on this since the Nvidia NF4 days. That was around 15-20W is my memory serves.

Does this change the answer any? Does knowing this help in any way?
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March 14, 2014 8:58:27 PM

the total power supply is really less than 150 watt.so why do i need to buy a new psu for 7770 hd.my psu is of 250 watt.7700hd needs 80 watts maximum and it can easily draw that power from the psu cuz i wonder that without 7770 hd my other components draws less than 150 watts.So,after buying a 7770 hd,the total consumption will be around 200 watts(and my psu is of 250 watts).So,will there be any issue with my psu?
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a c 94 ) Power supply
a c 88 à CPUs
a c 98 V Motherboard
March 15, 2014 6:45:13 AM

Probably yes. It's not just watts, but where those watts are available. Both the CPU and GPU will draw their power off the 12V rail. So an 80W GPU and a 95W CPU will be drawing all 175W off of the 12V rail(s). Drives will draw off the 12 and 5V, or some newer ones off the 3.3V rail. Motherboards get power from all rails. You might have a 250W PSU, but if 100W of that power is dedicated to the 3.3 and/or 5V rail, you only have 150W left on the 12V. Not enough.

There is also the problem of "lying" PSUs. PSUs that claim to be of a certain wattage (or use a number you might think is the wattage like "PSU450GX") but can't really put out that much power. When dealing with suspect or OEM PSUs I tend to believe they can only do half of what they claim. If you bought an HP/Dell/Acer, etc tower and it has a 250W PSU in it I'd trust it only to 125W. OEM PSUs aren't usually known to be as powerful as you might think. Dell did have some really great PSUs back in the day with their 305W units, but I'm not sure that's still the case.

Quote:
so why do i need to buy a new psu for 7770


I bet your 250W PSU doesn't have the 6pin PCIe plug the 7770 requires. Buy a new PSU, and make sure it can do what you think it can.
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March 15, 2014 10:34:05 AM

What about a 7750 hd?It is almost like 7770 hd and it need only 55 watts.My cpu is of dell and i believe that it is of a branded company.How can i find the power on the 12V, 3.3V and 5V rail of my psu.I am also thinking of gtx 650 which does not require a 6-pin power connecto
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a c 94 ) Power supply
a c 88 à CPUs
a c 98 V Motherboard
March 15, 2014 8:23:01 PM

The only way to see the rail power limits is to look on the side. There should be a chart that says something like this.

3.3v 5v 12v
20A 20A 16A

If it has more then "1" 12V rail there should be a sentence under the chart saying something like "12v1 and 12v2 not to exceed xxxW" The only way to know if the PSU can put out the claimed power is by reading a real review. For example,

http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Look at the first big graph. In test five they pull 549.6W out of this 550W PSU. This powersupply can really provide all that power. Others? Not so much.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

In this article this "1050" PSU could only provide 590W before giving up. Most OEM PSUs aren't tested so I'm not sure of how to tell if yours is good or not. The 7750 should be alright. Not sure about the 650.
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March 16, 2014 4:22:27 AM

Thanks.1 more query.many sites provide something like power calculator by using the information of the componenets of my cpu.Can we trust those sites?Do they give fake values?
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a c 94 ) Power supply
a c 88 à CPUs
a c 98 V Motherboard
March 16, 2014 6:32:21 AM

Some do. I don't pay attention to them to know which is which. Some are ran by companies that sell PSUs so if they can talk you into buying one that's bigger then you need it's good for them. For example if "PSU r US" has a calculator on their site that always adds an extra 100W then they can sell the more expensive 550W PSU instead of the 450W. Others like to make sure their answer is "right" and do the same so that when you buy one of the lying PSUs you don't come back and complain that they said you'd only need 300W and that $15 350W failed to run your system.

I prefer the harder way. Look up the TDPs of the CPU and GPU. Add another 50W or more depending on what you have in your system. (My old computer ran 8 drives, so 50W wasn't going to cut it.) Make this number ~80% of the output of a PSU that can really put that out. So if your CPU + GPU + 50W comes to 350, you need a PSU that can really output 437.5, or 450W. Also make sure you have the right plugs for your GPU. My AMD 7950 needs an 8pin plug, so I can't use a PSU that only provides 6pin plugs. This means even though my old Antec EA500W PSU has the wattage, because it lacks the 8pin plug I won't use it. Instead I use the newer Rosewill Capstone 450W which does have the 8pin plug. You'd think just by going with the wattage the EA500 is a better idea, but its not.
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March 16, 2014 8:57:53 AM

thank u so much
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