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Corsair HX450W enough for this i5 build?

G

G0rm

Junior Member
Hey guys,

My upcoming build:

Intel i5 750
MSI P55-GD65
XFX ATI Radeon HD 5850
Samsung Spinpoint F3 1 TB + Seagate 160GB
Corsair DDR1333 RAM 8 GB
DVD drive
1-2 case fans

Overclocking will be moderate, i.e. through the auto-overclock feature on the MSI board.

Will the Corsair HX450W PSU be enough to power this system?
 
If you don't already have it, I would look elsewhere. Why buy a PSU that right off the bat doesn't have enough PCI-E connectors?
 
For what you listed, here is about how it adds up:

Intel i5 750 -8A = 96W
MSI P55-GD65 8A = 96W
XFX ATI Radeon HD 5850 16A = 192W
Samsung Spinpoint F3 1 TB + Seagate 160GB 2A =24W
Corsair DDR1333 RAM 8 GB NA
DVD drive 2A=24W
1-2 case fans 1A = 12W

Added up that is: 444 watts , just on the 12V.
So get a supply that has 444/12 = 37 A at the minimum on 12V
 
Last edited:
Modelworks said:
MSI P55-GD65 8A = 96W
XFX ATI Radeon HD 5850 16A = 192W
Click to expand...

The mobo will be nowhere near 96W, especially since there is no memory controller or PCIe controller.

The video card will also be nowhere near 192W. The TDP is only 151W and actual normal power consumption is well under that.
 
theAnimal said:
The mobo will be nowhere near 96W, especially since there is no memory controller or PCIe controller.

The video card will also be nowhere near 192W. The TDP is only 151W and actual normal power consumption is well under that.
Click to expand...

Ratings I listed are for peak load that occurs when a system is powered on + overhead.
 
Modelworks said:
For what you listed, here is about how it adds up:

Intel i5 750 -8A = 96W
MSI P55-GD65 8A = 96W
XFX ATI Radeon HD 5850 16A = 192W
Samsung Spinpoint F3 1 TB + Seagate 160GB 2A =24W
Corsair DDR1333 RAM 8 GB NA
DVD drive 2A=24W
1-2 case fans 1A = 12W

Added up that is: 444 watts , just on the 12V.
So get a supply that has 444/12 = 37 A at the minimum on 12V
Click to expand...

According to Corsairs website it seems the HX520 has just 18A on 12V while the VX550 has 41A...is that correct, and how can the difference be that big?

Would the VX550 be the best choice for my setup then?
 
G0rm said:
According to Corsairs website it seems the HX520 has just 18A on 12V while the VX550 has 41A...is that correct, and how can the difference be that big?

Would the VX550 be the best choice for my setup then?
Click to expand...

The HX520 has Can do 18A on each 12v rail (it has three), or 40A total


I would prefer the VX550 not because the 1A would make a difference but because its a newer design. The HX520 came out over 3 years ago when standards of good efficiency/stability were lower. The VX is about 2 years old and should have better overall performance. Plus its cheaper. Basically, the 80-90 that hx520s go for nowadays are much better spent on newer PSUs (hell for that money you're only 10-15 away from a truepower new 750
 
Actually I think the HX450 would be perfectly fine for your build as long as you don't do overvoltage overclocking. On heavy load your components are unlikely to go over 300w and in most idling situations it'll be around 100-150w. Pretty much perfect in the range of the psu. Now if you don't plan on making any big expansions on your system, this would be good. Obviously bigger is better if you plan on any big upgrades. I always see far too many overestimations of power needs. Never seen a single friend with a REAL psu have an overload issue.
 
I did plug the components into a W calculator and the result was about 380W. I'd rather be on the safe side though. Also, I want this PSU to be quiet and efficient so a newer design is preferred, so I will probably end up with the VX550. As far as I know this is a good quality PSU 🙂
 
The HX450 is more than sufficient for that system. My system (see sig) overclocked to 3.8GHz only draws 280-290W at load. Also, modular is the way to go, excellent choice.
 
Yeah, you're fine. Don't listen to the nutters who say that your system will pull 500W at peak load, that's ridiculous.
 
I have the following system running on a 2 year old Corsair VX450:

Gigabyte P55-UD3R
Intel i5 / 750 (currently stock speed)
Gigabyte HD4850 1GB (fanless)
8GB DDR3 1333 (4 DIMMS)
(4) 120mm fans
500GB SATA
750GB SATA
Samsung DVDR SATA

System is rock solid but I am not going to OC anything on this PS.
 
davidrees said:
I have the following system running on a 2 year old Corsair VX450:

Gigabyte P55-UD3R
Intel i5 / 750 (currently stock speed)
Gigabyte HD4850 1GB (fanless)
8GB DDR3 1333 (4 DIMMS)
(4) 120mm fans
500GB SATA
750GB SATA
Samsung DVDR SATA

System is rock solid but I am not going to OC anything on this PS.
Click to expand...
Unless you're running high-end SLI or Crossfire, you should be able to overclock pretty much to your heart's content. If you have a Kill-a-Watt handy, see for yourself. I just tested my system @ 4GHz and I'm pulling 294W playing Borderlands. Calculate ~85% efficiency (which is very generous), and the PSU load is only ~250W.
 
MrK6 said:
Unless you're running high-end SLI or Crossfire, you should be able to overclock pretty much to your heart's content. If you have a Kill-a-Watt handy, see for yourself. I just tested my system @ 4GHz and I'm pulling 294W playing Borderlands. Calculate ~85% efficiency (which is very generous), and the PSU load is only ~250W.
Click to expand...
You Sir, win.

What people forget is, efficiency, even when measured from the wall it would be very hard to find a 1 GPU system which pulls more than 350W, factor in that the PSU is outputting only 85% (or so) of that and really, I would bet any 1 GPU system will be stable on any (quality) 400W+ PSU.

Of course as someone else pointed out, there is some merit to making sure it can supply enough power on specifically the 12v rail, but that is generally a non issue when buying a good brand.
 
Last edited:
Modelworks said:
For what you listed, here is about how it adds up:

Intel i5 750 -8A = 96W
MSI P55-GD65 8A = 96W
XFX ATI Radeon HD 5850 16A = 192W
Samsung Spinpoint F3 1 TB + Seagate 160GB 2A =24W
Corsair DDR1333 RAM 8 GB NA
DVD drive 2A=24W
1-2 case fans 1A = 12W

Added up that is: 444 watts , just on the 12V.
So get a supply that has 444/12 = 37 A at the minimum on 12V
Click to expand...

Hmm, but i got friends who have a 955 and a 4870 on that PSU, they say it was stable, you have calculated the Peak wattage of the system right ? Is this method even reliable to estimate the power consumption of the PC, never seen 400+W in a single review out there (which has 1 card ie).
 
MrK6 said:
Unless you're running high-end SLI or Crossfire, you should be able to overclock pretty much to your heart's content. If you have a Kill-a-Watt handy, see for yourself. I just tested my system @ 4GHz and I'm pulling 294W playing Borderlands. Calculate ~85% efficiency (which is very generous), and the PSU load is only ~250W.
Click to expand...

The VX450 is an excellent PS and I am sure it can handle a moderate OC. There is a Thermaltake Toughpower XT 750 sitting right here on the shelf waiting to be installed. Also an upgraded HSF (I hope it's an upgrade: http://forums.anandtech.com/showpost.php?p=28892315&postcount=8) on the way.

The VX450 is going into my OC E5200 system once I get a case for it.
 
I'm running a Corsair 400CX PSU w/ the following i5 setup:

Windows 7 Home Premium (32-bit)
Antec Solo
Dell 2408WFP
Gigabyte GA-P55M-UD2
Core i5 750 w/ stock cooler
4GB (2x2GB) DDR3 1333 G.Skill F3-10666CL8D-4GBHK
Western Digital Caviar Black 640GB
Seagate 7200.10 320GB
Western Digital Caviar Green 1TB
EVGA GeForce GTS 250 512MB
Scythe S-Flex 120mm/Scythe 100mm
Integrated Sound
ViXS Pure TV-U 48B0 PCI-E (NTSC/ATSC Combo)
Samsung SH-S223B 22x DVD +/- SATA2

Bill
 
I think you guys are all correct according to xbit's chart here. http://www.xbitlabs.com/articles/video/display/radeon-hd5850_11.html#sect0
Power consumption from normal gaming and stress test are different. ~300W for i5/5850 sounds about right for gaming, but 400W won't be enough if you OC or stress test the whole system.

My current OC e8400/4850/2hdd system is already at 330W using OCCT linpack+gfx bench/135W idle.. even if normal use and gaming require much less than 330W, I'd still be more comfortable taking that into consideration when choosing a PSU.
 
psihog said:
My current OC e8400/4850/2hdd system is already at 330W using OCCT linpack+gfx bench/135W idle.. even if normal use and gaming require much less than 330W, I'd still be more comfortable taking that into consideration when choosing a PSU.
Click to expand...
The problem is everyone is ambiguous in their reporting of "usage." When you say your system is "at" 330W, is that measured from the wall using a device like a Kill-a-Watt or is that measured from the PSU lines themselves?
 
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