merlin wrote:

ATWindsor wrote:I know quite a few seasonics have only one 12V-rail, despite having several "on paper", is there somebody who can confirm that the M700 also has one single huge rail?

AtW

Yes it's one rail internally.

Thanks, thats all I needed to know.

AtW

I know quite a few seasonics have only one 12V-rail, despite having several "on paper", is there somebody who can confirm that the M700 also has one single huge rail?

AtW

Do you really have to use another CPU to flash the 975/965-boards? Can't you just "overclock" the board to 1333 FSB even if the CPU is not recognised?

AtW

And the manufacturers all(?) say that anything below 55-60 degrees is fine. the fact that there is a temperature limit at all should tell you that excessive heat impairs hard drive performance, probably because the heat affects the magnetic media in the hard disk and causes it to lose its magnetiza...

Whatever the results of the temperatures, the fact is that with proper airflow the HDDs have the capability to get cooled to certain temperatures. I think it would be a mistake not to provide this airflow, as it can be done silently and not much is needed. Google may have done some real-world testi...

Not to beat a dead horse here. But I would like to repeat one of my questions. Giving that they are rated for the same current, is there a reason to assume that PCP&C is a better choiche than a seasonic? PCP&C unfortantly are a bit harder to ge by here.

AtW

Practical implementation is that the drives will always be powered-on, without a backplane and a direct connection to the PSU instead, the drives will NOT support staggered spin-up. You're talking about +65A @ +12v on startup and +35A or so on the +5v line, which is pretty large for a consumer-grad...

Here are som potenially useful details about the cable-problem: "Basically, it is controller default supports, no additional setup needed, but you will need to check your system hardware. First, you need to check the drive specification to make sure this drive supports Stagger Power On feature. Seco...

I checked again and it may be not enough... But you would need a PSU with over 60A on 12v to power all the drives during startup. You can either: a) Get such a PSU b) Are they SCSI or IDE drives? I know that at least SCSI drives/controllers supports so called staggered spin up, meaning not all driv...

daamain wrote:Unfortunately you can't totalize 12v lines. Cooltek CT 500 has 33A on the 12v. Should be enough.

You think so? Many Hs draws around 2A from 12V during startup, and more than 1A during use. To be honest I am worried about the headroom with only 33A

AtW

You can try Cooltek CT500, I believe it has 45A on 5V line. Altough I think 30A is enough for your HDs. Do you know how many amps it has on 12V? I have difficulity fonding info about it that is not german. I was thinking something in the line of 60A was nescessary, but thts probably a bit of overki...

Staggered spin-up requires backplane support as well, if memory serves. However so long as your controllers are delayed in start, that generally works. http://www.storagereview.com/HD501LJ.sr?page=0%2C5 Shows a bit less than +1A on +5v at startup. 32 drives is quite a lot, although you should be ok...

But people are not recommending buying a PSU wich runs on 100% load all the time. You'd be surprised. The article that I see getting quoted the most is the DailyTech pre-launch 8800GTX article where they run 3DMark on a GTX and say, "oh look, it only pulls 375W from the wall." (paraphrasing here.) ...

Are they SCSI or IDE drives? I know that at least SCSI drives/controllers supports so called staggered spin up, meaning not all drives start at the very same time in order to reduce peak startup current draw. Its Sata, my controller supports staggerd spin-up, but I think the drives have to as well....

You can try Cooltek CT500, I believe it has 45A on 5V line. Altough I think 30A is enough for your HDs. Do you know how many amps it has on 12V? I have difficulity fonding info about it that is not german. I was thinking something in the line of 60A was nescessary, but thts probably a bit of overki...

Continuous simply means "not peak." Peak is for only a second or two. Continuous can be a couple minutes, an hour.. maybe even 48 hours. But not a year and not five years. They don't figure out warranty's on cars by putting bricks on the gas pedal and having them redline for five years straight wai...

I'm getting a PSU to drive 28-32 HDs, as a rule of thumb i have assumed 1 A at 5V and 2A et 12V during spin-up, and i have run into a unexpected potential problem, the 5V-line. Seaonic and PCP&C both operate with a 5V at 30A even in their most powerful PSUs, is this enough during the spin-up-fase? (...

Nice review, not because this is a good PSU for quietness, but because your PSU-reviews are very good, regadless of PSU-type. The PSU might be a good choiche for a 30-40 disk fileserver. I actually think its good they have that many HD-cables. But you might run into a problem if they all come from t...

I just found one setup that actually WOULD need a PSU like this. AMDs new 4x4 gaming platform. http://techreport.com/reviews/2007q1/quad-core/index.x?pg=1 Just read that review. The power consumption is horrible and still they only use one 7900GTX. With a pair of 8800GTX you will end up using just ...

I don't understand why you would need two power supplies together when one of these is more than enough. Techreport has made numerous reviews checking power consumption. They've done it for 8800GTX in SLI with Core 2 Extreme X6800 (not the most power hungry processor family, but commonly used nowda...

To be honest, most people I have encountered who call themselfs audiophiles doesn't seem to be very interested scientifical measurments, and technological innovations that can actually be proven to work. So in general basis, I'm prety glad "audiophiles" doesn't deside the desgins. (However there ar...

Sorry to bring up an old review, but I must ask this. Wouldn't output by spdif to another DAC increase jitter? Wouldn't a USB DAC be better in terms of getting rid of jitter in the audio signal? Thanks. The odd thing about USB audio is that it is not properly error corrected - it's just as prone to...

A HD in the lower compartment does make a bit of noise IMHO. A proper enclosure helps (i have a nexus), however if you mount it in a 5.25 bay it will transmit vibrations, and there isnt enough room in the lower compartment, so its difficult to position it without hard mounting it. I have it laying o...

I wonder if SPCR should be testing such high-capacity PSUs at all? After all, if you are pumping almost a kilowatt into an average ATX case (or even a P180) getting <30dBA @1m is going to be almost impossible without exotic cooling. And even with AMD 4x4 + SLI 8800GTX + lots of hard drives 850W is ...

Tibors wrote:but a lousy fan hysteresis algorithm.

I'm sorry, but what does "fan hysteresis algorithm" mean?

AtW

Interesting article, It's good you have the info nescessary for people to build similar systems themself if they want.

A question: Q-fan is used to controll the fans in the media-center-PC, how does that work compared to speedfan or another software-based solution?

AtW

The diffrence between the "good" 120mm doesn't seem to be big, especially considering the sample variance. To me it doesn't seem to make that much of a diffrence if one chooses one the "quiet brands". Which there are quite a few of. The Noctua is pretty interesting, with an unusual design, maybe I'l...

Nicre review But a comparisonal graph would probably be useful, to get a overview of the differences at a glance.

I can't say I was to suprised by the fact that the diffrence between the measured noise is very small. But it was good the have it confiremd by another source.

AtW

It will be interesting to see your results, I once tried to measure about 8 fans in an anechoic chamber with a SPL-meter. I was unable to get a reliable reading of wind speed, however all the fans I tested had the same amount of noise at the same fan speed (within measuring errors), and followed at ...

I compared the SilenX 120mm versus the Nexus 120mm side-by-side several years ago. My recollection is that at equal airflow there was little or nothing between them in turns of volume of noise, but that on the quality of noise (particularly the lack of rattling, etc.) the Nexus had the edge. I tend...