Antec Basiq BP500U with no 8-pin connector?

Antec Basiq bp500u 500w atx12v power sup...
September 17, 2010 at 01:03:38
Specs: Windows 7 Ultimate, Intel Core i7-860 2.8 GHz / 8 GB
I decided to assemble my first PC and bought (among other things) Antec Basiq BP500U power supply and Asus P7P55D-E LX S1156 motherboard. The motherboard requires me to plug in to a 24-pin EATXPWR and to an 8-pin EATX12V. The power supply has no 8-pin connector but I found two 4-pin connectors, so can I use them instead?

All components below (in case needed to know) (it's supposed to be a silent computer, which isn't used much for gaming):

Processor: Intel Core i7-860 2.8 GHz 8M LGA1156 BOX.
Motherboard: Asus P7P55D-E LX S1156 P55 DDR3 USB3.0 SATA6 ATX.
Memory: 8 GB (1600MHZ DDR3 NON-ECC CL8 XMP KITX4).
Hard drive: Western Digital 1 TB Caviar Blue 3.5" SATA2 7200RPM 32.
Graphics card: Club 3D HD 5750 PCIE 1GB GDDR-5 HEATPIPE.
Optical drive: LG Blu-ray 10X BLACK RETAIL.
Power supply: Antec Basiq BP500U PSU 500W 8CM ATX12V2.2.
Case: Antec P183 Performance ONE ATX MIDI NOPSU BLACK.
Operating systems: Windows 7 Ultimate 64-bit ENG OEM (and Ubuntu).


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#1
September 17, 2010 at 01:49:56
Use only 4pin connector. Main connector (20+4pin). Next time purchase a psu with a single +12v rail.
*don't forget to do a benchtest*

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#2
September 17, 2010 at 07:08:44
Thanks, kuwese. I think I will buy a better PSU soon, because my motherboard user guide tells me on page 1-22: "For a fully configured system, we recommend that you use a power supply unit (PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum power of 600 W." (emphasis mine)

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#3
September 17, 2010 at 07:25:02
600w is meaningless, it is the Amps on a single 12V rail which is improtant, apart from a quailty manufactured PSU:

Corsair 400W CX PSU:

http://www.ebuyer.com/product/150985

http://www.amazon.com/gp/offer-list...


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Related Solutions

#4
September 17, 2010 at 08:06:12
x86 is right, here are the other options, rosewill green series 630w single +12v@50A or Corsair vx 550w single +12v@41A.

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#5
September 17, 2010 at 12:24:36
"The power supply has no 8-pin connector but I found two 4-pin connectors, so can I use them instead?"

In this case, no.

Antec Basiq BP500U power supply
connectors
http://www.antec.com/Believe_it/con...

Some PSs have a 4 + 4 12v cable with two connectors that can be used in an 8 pin socket (see the picture below - EXTX12v (8 pin) wiring connector picture) , but your PS doesn't have that.

The 4 pin ATX 12v connector the PS already has will plug into one end of the 8 pin socket - you could try that, it won't hurt anything to try that, but the mboard may not boot with just that and the main 24 pin one connected, depending on the current (amperage) required by the cpu you're using. .
.....

The connectors on the wiring coming from the power supply are deliberately designed such that the shapes of the plastic surrounding the female pins will only fit one way in one type of the connectors (sockets) with male pins on the mboard, or the on drives, or on the graphics card, etc.
In some cases, two connectors, or one one piece connector, will fit in a larger socket, but the shapes of the plastic around the pins and in the socket must be the same.

You could use the Antec Basiq BP500U, but it you did, if connecting only the 4 pin ATX 12v connector and main 24 pin connector doesn't allow the mboard to boot, you would need to buy a wiring adapter, which you should be able to easily get locally from a place that has lots of computer parts.

E.g.

Better....

ATX 4 Pin to 8 Pin Power Supply Adapter
http://www.pchcables.com/atx4pinto8...

http://72.167.21.163/member/HTB/img...

http://www.mitxpc.com/web/cables/EP...

http://www.lunashops.com/images/upl...

Or like this, but it uses up two drive molex connectors:

4-Pin Power Supply to 8-Pin ATX Motherboard Adapter
http://www.pcpartscollection.com/4p...

There are also similar that use only one drive molex connector.
........

More info. Pictures.

4 pin ATX 12v

Picture - same as +12V2 DC connector here:
http://www.smpspowersupply.com/ATX-...
fits into this socket:
http://support.gateway.com/emachine...

The shapes of the plastic in that socket are exactly the same as on one end of the 8 pin EXTX12v socket.

The plastic shapes around the pins on the 4 pin connector beside the 20 pin main connector is different
http://www.smps.us/atx-connector-20...

EXTX12v (8 pin) wiring connector picture
http://www.allpinouts.org/index.php...

Also note the shapes of the plastic around the pins of the left connector of the 4 + 4 12v cable - your 1 X 4 pin ATX 12v connector is exactly the same as the left connector and can be plugged into one end of the 8 pin socket.

Better view of the plastic around the pins here:
http://www.plinkusa.net/products/Ca...
http://www.dansdata.com/images/io09...

Your P7P55D-E LX mboard manual - page 34 of pdf - 1-22 of the printed manual - clearly shows the shapes of the plastic around the male pins in the 8 pin socket, when you zoom in. .
........

"For a fully configured system, we recommend that you use a power supply unit (PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum power of 600 W."

The mboard has an 8 pin socket for cpu power because at least some of the cpus you can use with the mboard require a lot more +12v power.
If you're using a cpu that doesn't require as much power, then a 500 watt PSU should be fine.
........

However, it would be a good idea to get a PS with more capacity anyway, because of the video chipset on the video card you're using.

"Graphics card: Club 3D HD 5750"

Typical minimum system requirements for a system with a HD 5750 video chipset on a card installed in a mboard slot:

"450 Watt or greater power supply with one 75W 6-pin PCI Express® power connectors recommended "

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.
(Onboard video - video built into the mboard - IS NOT A CARD ! )
If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

If you're a gamer...
In most if not all cases, the max capacity rating of the PS is an intermittent rating. It's recommended that you do not load your PS to any more that 80% of that rating if you are going to be using something that puts a constant load on it, such as playing a recent game for hours on end. In that case, you multiply the min capacity stated for the system with the particular video chipset on the card by 1.25 to find the min. capacity of the PS you should get.

In this case 450 x 1.25 = a minimum 562.5 watt PS.


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#6
September 17, 2010 at 15:02:45

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#7
September 18, 2010 at 02:32:33
I switched to Corsair TX850W PSU and booted my system the first time today (for example lights on the case and fans inside work). My computer keeps turned on for about 1 minute and turns off. After restart I see "CPU over temperature error" and also the DRAM_LED on the motherboard shows me red light for a while. I did have the CPU fan incorrectly attached and I fixed the position, but that doesn't help, so should I buy thermal paste in case it has dried or something like that?

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#8
September 18, 2010 at 20:41:43
I attached the CPU heatsink & fan correctly so that I heard a click for each fastener and used Arctic Silver 5 thermal compound, and everything seems to be working fine.

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