Resolved Motherboard Connections

I have embarked on building my own tower PC, I have purchased a ASUS P7P55D-E-LX motherboard and a new monitor it has VGA (blue) and DVI connections and cables, but now I notice that nowhere on the motherboard connectors are there connections to enable me to connect the monitor to it, have I purchased a motherboard that is not intended to be connected to a monitor or have I got to purchase additional parts? and if so what are they?
Also on reading the P7P55D user guide it recommends a 600w power supply, I have purchased a high spec Thermalite 500w is this a critical mistake and should I return and exchange.
Any guidance or suggestions would be most appreciated. Mike Devon (learner)

 

PeteC,
Thank you for the explanation, I will order the card and new power supply.
Incidentally it was you helping me to sort out a hard drive problem and giving me a source of computer parts that set me on my present course, don't be surprised if I'm back with other queries. Regards Mike Devon

 

I recommend you decide on a new graphics card before deciding what size PSU to buy. This is important because the graphics card, by a wide margin, can be the largest power consumer in your computer, depending on the GPU and RAM. While it is true your manual recommends a minimum of 600W, ASUS has no idea what graphics card will be used, so it has picked a number out of the air it feels is safe - and certainly, 600W is safe for most people. But then so is 500W. Here's a good link for deciding which card is for you - Toms Hardware - Best Cards for the Money, July 2010 (August should be out any day now).

If not too late, research the graphics card carefully. The card's maker should recommend a minimum PSU size too. Or better yet, see my canned text below for sizing up a PSU.

Use the eXtreme PSU Calculator Lite to determine your minimum power supply unit (PSU) requirements. Plug in all the hardware you think you might have in 2 or 3 years (extra drives, bigger or 2nd video card, more RAM, etc.). Be sure to read and heed the notes at the bottom of the page. I recommend setting Capacitor Aging to 30%, and if you participate in distributive computing projects (e.g. BOINC or Folding@Home) or extreme 3D animated gaming, I recommend setting both TDP and system load to 100%. These steps ensure the supply has adequate head room for stress free (and perhaps quieter) operation, and future hardware demands. Research your video card and pay particular attention to the power supply requirements for your card listed on your video card maker's website. If not listed, check a comparable card (same graphics engine and RAM) from a different maker. The key specifications, in order of importance are:

1. Current (amperage or amps) on the +12V rail,
2. Efficiency,
3. Total wattage.

Don’t try to save a few dollars by getting a cheap supply! Digital electronics, including CPUs, RAM, and today's advanced graphics cards, need clean, stable power. A good, well chosen supply will provide years of service and upgrade wiggle room. Look for power supply brands listed under the "Good" column of PC Mechanic's PSU Reference List. Note that some case retailers "toss in" a generic or inadequate PSU just to make the case sale. Be prepared to "toss out" that supply for a good one with sufficient power.

Most PSUs have an efficiency rating of around 70%. This means for every 100 watts of power a PSU draws from the wall, only 70 watts is delivered to the motherboard, with the rest wasted in the form of heat. The best supplies are 85 to 90% efficient, and as expected, cost more. I strongly recommend you pick a quality supply with an efficiency rating equal to or greater than 80%. Look for 80 Plus - EnergyStar Compliant labels.

Too big of a PSU hurts nothing but your budget. Your computer will draw from the PSU only what it needs, not what the PSU is capable of delivering. If a computer needs 300 watts it will draw 300 watts regardless if the PSU is a 350W, 650W, or 1000W PSU. In turn, the PSU, regardless its size will draw from the wall only what it needs to support the computer. In this example, it will draw 300 watts, plus another 45 "“ 90 watts, depending on the PSU’s inefficiency.

As noted, the eXtreme Calculator determines the minimum requirements. If the calculator (with the changes I suggested) recommends a 400 watt minimum, a quality 400W supply will serve you just fine. But a quality 550W "“ 600W supply will have, among other things, larger heat sinks to dissipate potentially more heat. It might have a larger fan too. The 400W supply will run most of the time closer to capacity, while the larger supply will be loafing along, rarely breaking a sweat. To help the smaller heat sinks get rid of the wasted 80 watts (20% of 400) of heat, the fan in the 400W supply may need to run full speed, while the fan in the larger supply, with bigger sinks just loafs along too "“ but in near silence.

Don't forget to budget for a good UPS with AVR (automatic voltage regulation). Surge and spike protectors are inadequate.
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Bill, Thank you for your detailed reply, as a novice this is just what I need, a clear explanation and leads to finding the best solution, much appreciated. Mike Devon

 

Thanks! Much nicer than being accused of being long-winded or wanting to hear myself talk, err, type.