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You can’t have a PC without a case. The trouble is that cases are one of the first places resellers sacrifice quality in order to bring down system costs. From an end-user perspective, this might seem to make sense. After all, the case appears to exist in order to hold components in place and put a pretty face on a bunch of fans and circuit boards. So long as a chassis sports a sufficient number of drive bays and isn’t blatantly ugly, it’s generally good enough to use as the default case for most systems. |
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There are two
problems with this view. First, growing complacent with a rock bottom
cost case encourages salespeople to ignore cases as an easy and lucrative
upsell opportunity. Second, cheap cases and power supplies can come back
to bite you in the long run. In the time it takes you to diagnose and
RMA a blown capacitor in a power supply, you’ve lost your profit
on that component to your tech’s time and shipping costs. And what
of the infamously sporadic, case-related tech issues that crop up? Without
the cover on, the system works fine. With the cover on, or perhaps with
a book resting on top of the chassis, the PC is dead. Welcome to the
world of short circuits brought on by poor design and difficult assembly
methods, problems that we’ve seen take days for good techs to troubleshoot. Customers Love: Bling-Bling |
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| Customers Love: Quiet Naturally, many clients don’t care as much about cosmetics. Their systems stay out of sight under a desk and what matters more is noise—or, rather, lack of noise. One of the biggest trends sweeping through the case market today is finding new ways and designs that dampen the decibel output from chasses. Antec’s Sonata, previously reviewed in the Easy Upsell column and discussed in our up-close interview, has been a huge hit with resellers looking to provide a high-performance, stylish, and affordable case to professionals with an ear out for silence in their workplace. Customers looking for similar advantages in a smaller desktop design should target Antec’s Overture, which incredibly holds seven bays and a 380W TruePower PSU but still keeps a very sleek exterior. Sometimes even seemingly top-quality attempts at quiet towers can fall short of the mark. One of the systems in our office is built in a Lian-Li PC-6070 mid tower. This is a heavy-duty chassis fashioned from thick aluminum paneling with bottom-front air venting that’s filtered to keep out dust. The insides of the top and side panels are coated with foam padding. The gap between the front panel and the chassis frame is lined with rubber, as is the edge of the heavy front panel door. The object is to dampen vibration and block noise from escaping. We selected this case specifically for its silent computing and have been dismayed ever since to find that there is a sporadic rattle that comes and goes every few days. Sometimes it seems to come from right below the top panel; other times we think it’s the backplane around the PCI cards. The point is that even the best-laid silent computing plans can be waylaid by oversight of one or two critical details. There are things you can do to help clients reduce noise in their systems. Obviously, you want a chassis constructed of good quality steel or aluminum, not flimsy sheet metal that may or may not have been properly riveted together. Look for things such as rubber dampeners at key points, particularly around the drive cage as this will be the area most susceptible to vibration. Know also that different drives are prone to varying amounts of vibration, especially with high rotation rates. If your customer doesn’t need a 52X CD drive, for example, consider going with a decent quality 40X or so and sell on the value of quiet running. Another big cause of system noise is improper air flow. As customers elect to toss in top-speed CPUs, cutting edge graphics cards, DDR500 memory modules, and so on, those components all generate considerable heat that needs to be removed from the chassis. The usual solution is to tack on case fans. However, three blower fans with no counterbalancing intake will have minimal effect and only serve to crank out decibels. Ideally, a system should have equally balanced intake and exhaust, resulting in neither positive nor negative pressure inside the chassis. Chances are you don’t have advanced air flow testing apparatus in your back room, so you can do an informal test by holding a match up to a vent hole in the case and seeing which way the flame leans. Hopefully, it won’t lean at all, thus indicating a balanced pressure arrangement. Larger fans can move the same amount of air as smaller fans with fewer RPMs, and thus run more quietly. Some towers come ready for 120mm case fans rather than the usual 80mm, and this represents a great upsell opportunity. AOpen (usa.aopen.com) in some instances adopted 90mm instead of 80mm fans and in doing so dropped the noise output from 32 dB to 24 dB. You should also target temperature controlled fan models that can take their cue from the motherboard BIOS and only crank into faster, noisier modes when the need dictates. AOpen is actually an interesting case in point (pardon the pun). Most of the company’s enclosures are fairly dull to look at, but their design and construction is quite good. As one of the larger case manufacturers, AOpen usually OEMs for resellers going into vertical markets, particularly education and government, where a fine line has to be tread between pricing and quality. The company predicts that thermal issues will become far more prevalent by mid-2004 and that companies which merely punch ventilation holes in cases because that’s where their competitors punch their holes will start to suffer. AOpen uses expensive simulation software to analyze system airflow throughout the entire case. As one example, a company product manager recently told us that while many AOpen towers sport two 80mm fan grilles below the power supply, analysis showed that it was actually more effective to use the lowest hole rather than the one immediately under the PSU. Be careful which noise measures you take, though. Dynamat foam padding is a popular solution for decibel dampening, but critics point out that the foam also acts as insulation, so unless heat is being quickly and effectively removed from the chassis, the system will trade noise for heat. Higher heat will cause system fans to spin faster, and thus the benefits of the matting might be negated. This is why it’s important to sell high-performance users on temperature monitoring accessories, such as those by Vantec (www.vantecusa.com) and Enermax (www.enermax.com.tw). Also don’t forget to use low-noise power supplies. We’ve been long-time fans of “silent” units from Antec, Vantec, and Seasonic (www.seasonic.com). In general, we prefer units with fans mounted in the bottom of the PSU rather than the front (chassis back panel side) as this seems to do a more effective job of drawing heat directly off the CPU and northbridge heatsinks. (Another solution to this problem is to use an air guide, such as those offered by Antec and AOpen. This is essentially a wide tube that rests over the CPU fan and feeds into a grille in the side panel—simple but effective.) Models with interior LEDs are also a plus. |
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There are things you can do to help clients reduce noise in their systems. Obviously, you want a chassis constructed of good quality steel or aluminum, not flimsy sheet metal that may or may not have been properly riveted together. Look for things such as rubber dampeners at key points, particularly around the drive cage as this will be the area most susceptible to vibration. |
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Copyright © 2007 RAM Magazine. All rights reserved.
Do not duplicate or redistribute in any form. |
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