Heat, Speed, & Sound

Speed:

Mr. Tobias Schonherr pointed out an error in my assembly of this new computer. Thank you Mr. Schonherr! I had misinterpreted the Intel manual on the DP35DP motherboard, and unwittingly installed the two memory modules in single-channel mode rather than dual-channel mode.

As I understand it, dual-channel mode enables the CPUs to make two requests on memory at one time, increasing overall memory throughput. See below. First the memory modules before and after, then the resulting Windows Experience Index before and after. The computer recognized 4 Gb of memory in each case, but you will notice that the memory sub-index jumped from 5.6 to 5.9, now as high as any other element of the system and higher than the dual-processor CPU.

Before	After

Heat:

Modern computers contain a host of self-monitoring devices, temperature monitors in particular. I installed the Intel Desktop Utilities, which takes advantage of those devices to provide readouts and to raise an alarm if some device goes outside its limit.

A few days back I returned to my computer to find an alarm on the screen. The CPU had exceeded its temperature limit of 68 degrees C for several minutes, going as high as 69 C (156 F). I downloaded a system-exerciser program called HeavyLoad and ran the CPU test, which is a repetitive graphics application, and the CPU temperature jumped right up to 70 C, CPU fan becoming very audible. Oops - problem.

I wondered if the thermal transfer between the CPU and its heatsink was OK. I had removed the heatsink once to re-check that the CPU was correctly loaded in its socket, thus disturbing the termal transfer compound. Also I had never felt good about the seating of the clips that hold the heatsink to the motherboard.

So I removed the heatsink once again, removed the old thermal transfer compound, and applied Arctic Silver compound in its place, evening it out with a credit card. Replacing the heatsink atop the CPU cover, I tried very carefully this time to apply equal pressure on all of the mounting clips, hearing a satisfying little click at each corner, an assurance that the heatsink is held down squarely. I also disconnected the internal case fan from motherboard control and connected it to full voltage so that it will always run full speed. It's noiseless anyway.

Good results! The following measurements were made with HeavyLoad executing its graphic application (about 60% CPU utilization), and the hole pattern in the back of the case blocked, thus forcing air to come all the way through from the front). In each case, temperatures were allowed to settle for at least a quarter of an hour. The CPU fan is automatically controlled from the motherboard:

Conditions	CPU	MOB	ICH	MCH	GPU	CPU
	C	C	C	C	C	Fan
Max allowed	68	85	119	109		RPM
Exhaust fan LOW (silent)	60	48	62	66	53	1467
Exhaust fan MED (audible)	60	49	62	66	50	1345
Exhaust fan HI (whoosh)	59	47	62	66	50	1348
Fan LOW, no HeavyLoad	40	41	63	66	53	927

I wish it were cooler still, but the CPU is now well within specifications. Further, the speed of the rear exhaust fan doesn't seem to make much difference in the temperatures, though it makes a lot of difference in noise. So I'm leaving the fan on low until there is a problem.


Noise:

I admit that my hearing isn't what it once was, but this system is so quiet that I can't always be sure I'm hearing it. A very low rumble from the disk drives is about all there is, and only when they are busy. But when the forced-air-furnace comes on I just can't hear it at all. I LOVE that! Now about that furnace ...

The Computer Is Built!

And I'm pleased with it.

Performance:

The overall Windows Experience Index is 5.4, which I believe is pretty good. The limiting subscore (5.4) is the disks, actually, and they are very high-speed SATA II 7200-RPM drives, though you can get 10,000 RPM drives which should be faster yet. The highest subscore is the Windows Aero graphics, 5.9. Everything else falls between, so the system is reasonably well balanced.

Quietness:

When there is nothing else going on in the room, TV and the old computer turned off, sitting at my desk, I can hear a faint, low-pitched roar similar to the sound you hear by holding a large seashell up to your ear, but certainly not that loud. It has a resonance to it, despite my efforts to dampen sounds inside the box. I think that the rear fan is the origin of most of the noise. It's not objectionable, because it's faint, but I will probably try to do more to limit the sound, such as:

• Add more sound-deadening material inside the box; there is room on the side cover for more;
• Play with fan speeds. The computer reports its own temperatures at several places including the CPU, graphics card, and motherboard, and those are quite comfortably within spec right now, so I could choose a lower speed for the rear fan;
• Cover the strange hole pattern on the back of the case, for which there seems no purpose; and
• Replace or rewire the rear fan. The motherboard came with a fan-control connection for that fan, but oddly, that fan did not come with a connector for the fan control. It may be easier for me to order a fan with the right connector rather than a conversion cable.

Bottom Line:

It's a good computer. Luckily there were no DOA (dead-on-arrival) parts, and it came right up and ran. The only problems were software ones, after Vista was installed and not to be discussed here (though I may yet post a rant about Vista. It is SO awkward and obtuse). I think that once a person has the proper parts on hand, one could put a computer like this together in an hour or two, including the initial Vista installation.

Below is a pictorial of the build process, in reverse order. Click on the Materials List on the side panel to see what went into the computer.


After powering up the disks, this screen in the BIOS allowed the association of drives A and B as a single fault-tolerant 320 Gb RAID disk before anything was ever written to the disks.


When first powering up the system, I had disconnected all of the disk drives and some other stuff to see if the CPU and motherboard would POST (power-on self test). THEY DID! This screen proves that a lot of stuff was working:

• Power supply;
• Motherboard;
• CPU;
• Graphics card, at least sufficient to display to the generic screen; and
• USB ports and keyboard-handling firmware on the motherboard;
• Fans (I could see them turn).

The box is fully wired and ready to test.


The motherboard is installed and screwed in place.


The three 320 Gb hard drives are in place and wired up. Two drives are for the fault-tolerant RAID disk, and a third will be used as a backup.


It's still hard for me to reconcile this palm-sized, silent, extremely fast 320 Gb drive with the washing-machine-sized sub-Gb drives I cut my computer teeth on years ago. And in just a few years, even these will be replaced with much faster flash drives having no moving parts at all.


Sound-deadening material stuck to the back side of the hard-drive cage. A similar piece is attached to the side door covering the drives on this side, and on the bottom and top of the cage. I attached this material on all interior surfaces wherever it could be attached without getting in the way or interfering with the passage of cooling air.


Sound-deadeing felt. Found in the local Menards hardware store, not for the purpose of deadening sound, but I think it should work. I liked the black better, but the store didn't have much so I bought some of both.


Front fan installed inside of the hard drive cage, to pull air across the drives and blow it toward the graphics card and CPU. See earlier posts for other views of the entire case.

Everything is Here

The Intel E6750 Boxed CPU and three Western Digital 320-Gb SATA hard drives arrived today, and now all of the parts are here. I set everything except the case out on the picnic table for a photo. Out of several photos, my sweetie liked this one with fall color in the background :-)

Then I downloaded an Intel video that demonstrates how to install the processor and "thermal solution" (fan + heat sink) on the Intel DP35DP motherboard. After playing the video once, I played it again and did the installation while watching the video. What makes it tricky is that dozens upon dozens of tiny pins on the motherboard socket must match up with a similar number of contact lands on the CPU wafer, without bending any of the pins.

And the CPU is just a wafer at this point, not fragile exactly but the motherboard pins are. You are supposed to set the square wafer straight down on the pins without sliding it at all, but I must admit that when I set it down it wasn't perfectly aligned and it did slide slightly. I hope those pins handled it - I didn't look.

After inserting the wafer you close a little door and then a little spring handle to press the door and wafer down tightly against the socket pins. Then you put the heatsink on top of it all and fasten it down with its own little plastic clips, plug the heatsink fan into the appropriate connector, tie off any spare wire, and job done. I hope. I'll feel a little better when I power it up and get a BIOS screen.

By comparison, the 4 Gb of G.Skill RAM seemed quite easy to install. Just push it carefully into the socket.

On another note: My first experience with computers was in 1962, 45 years ago, when disk drives were barely on the horizon. We used a magnetic tape operating system, and wrote programs on punched cards or paper tape. Later, about 28 years ago, I bought my first computer while working at 3M, with 64 Kb of RAM (yes RAM, not core), and a 5-Mb disk drive which was too heavy for one person to manage alone. These palm-sized disks each have 64,000 (sixty-four thousand) times as much disk capacity, and the CPU will enjoy 62,500 times as much RAM. Oh, and the RAM is about 800 times faster, while the CPU is easly 2500 times faster and there are two in the chip. Isn't technology stunning?

Antec Sonata III 500 Review

Noise Reduction:

The Sonata III 500 is supposed to be one of the quietest computer cases on the planet, advertised by Sonata as "whisper quiet when it comes to system noise." This is why I bought it, but frankly, I don't see what all the fuss is about. Here is what the Sonata III 500 does have for noise reduction:

• An efficient 500-watt power supply with its own "low noise" cooling fan. I haven't powered it up yet, so I can't yet testify to the lack of noise but I expect it to be quiet,
• A normal-looking three-speed 120 mm rear exhaust fan. I was unable to find noise ratings published by Antec, but I expect it to be quiet at the lower speeds and noisy at the top speed,
• Silicone grommets for mounting the hard drives, to absorb noise and vibrations, and
• Rubber feet.

On the flip side, though, here is what the Sonata does not have:

• Sound-deadening panels or foam of any kind to absorb sound or prevent conduction through the hard steel panels,
• Baffling to prevent sound generated inside from coming out either the front or back air ports,
• Gaskets or sealant to prevent sound from coming through the various cracks, such as around the side and front doors,
or
• Joint treatment to prevent the doors from rattling.

I have a lot of experience in older computers, the kind that were once called minicomputers, but I am certainly not an expert in modern PC's - this is my first build. So maybe none of those things are important or should be expected, although Sonata does indeed provide sound-deadening panels on some of their other cases so I guess that one matters. I may add my own panels where there is space to do so, especially around the hard disks.

Air Cooling:

The air filter is built-in, removable, and washable, but dubiously effective at filtering air and obviously no good at baffling noise. It is simply a very thin plastic piece with lots of little holes in it, as shown in the photo, in fact so flimsy that I broke one of the latch handles the first time I tried to remove the filter. It should be provided with some kind of filter medium, and the accompanying manual appears to show such a piece, but none came with the case. Perhaps I'll add one myself and punch out the lattice of holes, which will just plug up anyway and cause the fan to speed up and make more noise.

Furthermore, there is a big pattern of holes in the back cover which appears to be positioned to provide air to the PCI devices, but which has no filter at all and which looks like it would admit air which would circulate directly up to the rear exhaust fan without doing much good. There are brackets inside which could be used to hold a filter, or even an air-blocking cover, but no documentation about such an accessory was provided. Maybe this is standard, and I ought to know about it, but I don't, and I don't find it on my older PCs. I may try to block it myself, or cover it with a filter medium, after I see exactly how all of the components fit inside the case.

The rear exhaust fan is a three-speed, automatically controlled by the motherboard, which I believe is normal these days. There are screw holes for another fan inside the case between the hard disks and the motherboard, but no fan is provided because, according to Antec, this will add noise. I have ordered a very-low-noise fan for this location, to help cool the disk drives as well as the graphics card attached to the motherboard. It looks as though it will fit with very little room to spare.

Feet:

Other reviewers of this case have complained that the rubber feet are attached only with adhesive and tend to come off. I judged that my box would have that problem too, and fixed it right away by screwing the same feet securely to the case through 1/8-inch by 3/4-inch fender washers. See the photos. I can't imagine why Antec doesn't do this themselves, especially when all objective reviewers mention it.

Power Connections:

I am impressed by the sheer number of power connectors available out of this supply. With no experience in such things, sixteen connections seems like a lot to me, a good thing. It has four SATA connections, which might seem like a lot, but I may still need to add one additional SATA power output if I install three hard disks and two DVD drives. Nevermind, there are inexpensive "Y" cables for this very purpose.

Case Size:

I thought that this was a "full-size" ATX case, or I would have ordered a different one. It is not, but this is MY FAULT because Antec's literature clearly describes it as a "super mini tower." Regardless, the case is large enough to accommodate a "full" ATX motherboard, and I think it will hold the other stuff I've ordered with some space for expansion. Therefore, even though I am currently somewhat underwhelmed by the quality of the Sonata III 500, I do like the specifications on the power supply, I find the box attractive, and I will build my new computer in it.

I ordered all of the other components for the computer yesterday, mostly from NewEgg.com, but the motherboard from ZipZoomFly.com because NewEgg didn't have it at the time. They do now, for less money. Tsk. I bought SATA data cables and one power "Y" cable from SataCables.com. Here is the materials list. I may post about the Sonata case again after I have it filled and powered up, when we'll know how quiet it is.

Your comments, objections, and suggestions are invited.

Choice of Motherboard

This computer (which I call Stirling) will require a motherboard, like any other computer, which will be host to the CPU, memory, graphics, audio, disk controller, and much more. There are many motherboards, by several manufacturers, which support the E6750 CPU that I have selected, and which will fit perfectly in the full-size ATX cabinet that I have ordered. For better or for worse, however, I have not made a search for the "perfect" motherboard and have decided to just order one by Intel, for these reasons:

• I like Intel,
• They are an Amercan company (at least headquartered here), and
• They make the CPU as well, so I expect to get support, if needed, without finger pointing.

Do let me know if I am dreaming.

From what I have read about the Intel motherboards, they are reliable, utilitarian, and straightforward. They are not for gamers and other overclockers, because they do not allow most of the voltage and clock adjustments that those folks seek. The Intel boards are not simple, however. They all include such features as:

• Slots for 8 Gb of 800 MHz main memory,
• Lots of serial ATA (SATA) disk interfaces,
• One back-compatible Parallel IDE interface,
• Audio system,
• LAN 10/100/1000,
• Legacy I/O including a serial port, consumer infrared, PS/2 mouse & keyboard,

Some include a diskette controller, and some contain an internal graphics controller. All support Windows Vista, 1333 Mz FSB, 12 USB ports, and more. Here is a table comparing the four Intel motherboards that support the E6750 and similar CPUs.

I've chosen the Intel DP35DP motherboard, distinguished from the others by the following set of features:

• Full ATX form factor, for maximum on-board real estate,
• Six SATA interfaces, as much as any board
• Three standard PCI slots,
• Three PCI 1 slots,
• RAID support, but
• No graphics accelerator, and
• No legacy diskette I/O.

Those last two are a trade-off so that the card can have the maximum number of SATA interfaces and PCI slots, as well as the maximum real estate for cooling and component fit. Graphics will be provided by a separate graphics accelerator card, and diskette support will be provided through an internal USB connection.

If it sounds like I know what I'm doing here, don't be fooled. These are the musings of a complete novice, and any comments will be appreciated and valued.

CPU Cooling

The Intel Core 2 Duo 6750 processor comes in a retail box from NewEgg and others, complete with a processor cooling solution consisting of a small fan and cooling fins. Concerned about noise, I searched for a passive design, without a fan, to replace the Intel cooler, and came across the web site FrostyTech.com, where CPU heatsinks of many types are compared. One of the evaluated heatsinks is the "stock" fan/fin cooler provided by Intel with the boxed processor.

According to FrostyTech, the Intel cooler is very quiet, one of the quietest coolers evaluated. The article includes a large table of coolers, with the stock Intel 35 db quieter than the noisiest cooler and about 20 db quieter than the median. The description was also very favorable, it "operates very quietly at its default speed."

However the fan was not tested in the mode in which it will actually be used. FrostyTech used a 3-pin connector, which causes the fan to adjust its speed according to ambient air temperature. In the Intel boxed solution a 4-pin connector is used, permitting the fan speed to be programmed according to the actual CPU temperature, in which case it might run faster and make more noise. Nevertheless, it's my guess that the Intel fan will be quiet enough, probably much quieter than the two mirrored 320 Gb disk drives that will be running in the same cabinet, and probably also quieter than the cabinet fan.

FrostyTech also evaluated the cooler's actual cooling ability, applying an 85-watt heat load, which is slightly higher than the 65 watts dissipated by the E6750 at maximum current. Here the Intel cooler did not fare as well, ending up near the top of the list with the highest CPU temperature (least cooling), some 20 degrees C higher than the best cooler. Again, though, the fan was not operated in the mode in which it will be used in my computer. I suspect that Intel knows what it is doing, and the cooling will be adequate for my relatively tame application.

I did find two heatsinks by Spire, both of which include a noisy fan, but which (according to Spire) can be used without the fan if the heat load is not excessive. One of these was also evaluated by FrostyTech, who downrated it for its bulkiness and thought it was difficult to install and remove. They did not test it without the fan, but considering the tests they did perform I doubt that it would perform very well without the fan unless there was a gale wind flowing through the cabinet. In my modest search I did not find any other passive CPU heatsinks. These are available on some graphic accelerator cards (which are CPUs in their own right) but apparently not for CPUs. If you know different, please let me know.

Bottom line: I'm going with the stock Intel cooler unless the noise is a big surprise. If so, then I'll look at other coolers.

Windows Vista Ultimate

I'm not yet a big fan of Windows Vista, but unless I go to some form of Unix it is in my future whether I like it or not. The machine I am building will support the fanciest operating system that Microsoft makes, which is 64-bit Windows Vista Ultimate.

It would certainly also support Windows Vista Business, which is about $50 cheaper than Ultimate, but Ultimate has two things I might want that are not in Business:

• Media Center stuff - I could become interested in this, and
• Windows BitLocker, drive encryption.

So I ordered Windows Vista Ultimate, full, not upgrade or OEM, from VioSoftware for $253.22. Note: VioSoftware has two prices for this software package, one if you go to PriceGrabber first and a higher one if you go directly to VioSoftware. There is a $27 difference.