Search found 59 matches

by photonblaster
Mon Jul 08, 2013 4:57 pm
Forum: SPCR Article Discussion
Topic: NoFan CR-95C Copper Fanless CPU Cooler
Replies: 44
Views: 40806

Re: NoFan CR-95C Copper Fanless CPU Cooler

Whether the high price is worth it or not, it's a very interesting and apparently well designed cooler! There's one thing I've been wondering since I read this review. With that big hole in the middle, what kind of performance would the thing have with a large fan (120mm?) zip-tied to it, pushing o...
by photonblaster
Mon Nov 07, 2011 7:38 pm
Forum: SPCR Article Discussion
Topic: Lian Li PC-V354 MicroATX Mini Tower Case
Replies: 20
Views: 9687

Re: Lian Li PC-V354 MicroATX Mini Tower Case

Does the 320mm height include the feet, or is it top of case to bottom of case excluding feet? I need this info for designing a mod of the case, thanks in advance.
by photonblaster
Sat Jul 23, 2011 9:37 am
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

Now you are just trying to prove each other wrong instead of making a constructive argument. Actually, multiplexer, Hfat never tried to prove anything, just gave (arrogant) opinion with posts with innapropriate hyperbole and numbers not backed up. If it happens on my thread, I like to take such pos...
by photonblaster
Sat Jul 23, 2011 9:25 am
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

multiplexer wrote:.....SSDs are vastly superior to HDDs in every practical scenario. ..... There is only one scenario where HDDs perform better, and that is sequential write. ........
But multiplexer, havn't the newest SSD drives surpassed HDD even in this one scenario?
by photonblaster
Fri Jul 22, 2011 6:01 pm
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

Your dishonesty is appalling. Why do you bother? The Velociraptor you're talking scored 144MB/s in IOmeter. The Vertex 3 you're talking about (the one that costs about $500, the affordable doesn't perform like that) scored 225MB/s in IOmeter. You had to compare different benchmarks to get the resul...
by photonblaster
Thu Jul 21, 2011 4:15 pm
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

I was being generous actually. These numbers are evidently worse than useless since they led you into believing that the Vertex3 has particularly good sequential write performance. Misleading data with no warnings is worse than no data at all. You can actually find single hard drives which are fast...
by photonblaster
Wed Jul 20, 2011 4:23 pm
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

Storage Review's numbers are useless. Why do you say such a extreme statement? They have probably a couple dozen metrics for each drive review, you can pick what metric is important to you. What review site is better? You also said that "The newest SSDs are still not as fast at writing sequentially...
by photonblaster
Tue Jul 12, 2011 10:12 am
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

At the low end, you still get better sequential writing performance for the money with spinning drives... and not by a small margin. I am not sure what your comment is supposed to convey. Do you mean "low end", ie old cheapest SSDs are not as good as a spinning drive? I just went to storage review,...
by photonblaster
Tue Jul 12, 2011 9:00 am
Forum: Silent Storage
Topic: multiple hard drives, not for server but for RAID speed
Replies: 28
Views: 6149

Re: multiple hard drives, not for server but for RAID speed

Since I did the first post on this thread, SSD performance has skyrocketed, and SATA 6Gb/s SSDs are so fast now that a SATA 3Gb/s interface slows them down. Except for cost, the newest SSDs are the way to go if you want speed. And PCI RAID SSD configurations are insanely fast it seems.
by photonblaster
Wed Jun 01, 2011 5:22 pm
Forum: CPU Cooling
Topic: NZXT HAVIK HS Review
Replies: 1
Views: 607

NZXT HAVIK HS Review

http://www.tweaktown.com/reviews/4127/n ... ndex3.html
Interesting first cooler by NZXT, very quiet and very high performance if you can believe Tweak Town numbers.
by photonblaster
Sat May 14, 2011 6:46 am
Forum: SPCR Article Discussion
Topic: Thermalright Venomous X Silent Edition CPU Cooler
Replies: 14
Views: 6556

Re: Thermalright Venomous X Silent Edition CPU Cooler

Why are the Noctua 140's being used as reference fans and not the Scythe? According to previous SPCR comparisons, they give better cooling at the same noise level (or the same cooling at lower noise level): (I quote my comment posted regarding a different review): In the Prolimatech Armageddon & Coo...
by photonblaster
Mon Mar 07, 2011 10:17 am
Forum: Power Supplies
Topic: NOFEN fanless 400W 80+ Bronze
Replies: 2
Views: 1200

NOFEN fanless 400W 80+ Bronze

Saw an add at Frostytech. Never heard of this company, they have a fanless massive cooler too.
Didn't get any hits on where to buy, looks like not available in NA yet.
http://www.nofencomputer.com/eng/products/main.php
by photonblaster
Fri Mar 04, 2011 7:59 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

Great discussion, guys. Lots of food for thought, many interesting observations. I think photonblaster 's original post & comments have real merit. 1) The relationship between speed & noise is probably more linear (with some fans) to a lower level than the 10-11 dBA noise floor of the SPCR anechoic...
by photonblaster
Sat Feb 26, 2011 9:25 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

2) From a listening point of view, the backgound level probably has less "spikes" in the spectrum (you can see this in most reviews by SPCR, for instance look at frequency curve for the backgound noise in this article http://www.silentpcreview.com/article1150-page3.html ). So a fan with the same no...
by photonblaster
Sat Feb 26, 2011 5:25 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

Does the analysis change if you treat the background noise, not as something special, but as the same as the noise of one more fan? This is an open question to anyone. The answer may depend on your point of view. I see two responses: 1) Purely mathematically, the noise value does not matter where i...
by photonblaster
Fri Feb 25, 2011 9:40 am
Forum: The Silent Front
Topic: How to get some more testing done?
Replies: 0
Views: 2264

How to get some more testing done?

Testing fans is obviously very time consuming. What about tapping into the local science student community? There may be some bright young physicists at the honor high school level or the BSc level that might be interested in doing a project for a science fair or school assignment. eg they could loo...
by photonblaster
Thu Feb 24, 2011 5:01 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

There are 3 valid measurements you can use from that review (not 4) - 25db@12V, 22-21db@9V, and 20db@7V. the <19 cannot be represented as a point on a graph since you don't know it's value. The noise floor in your graph is 2-3 db lower than actual noise floor measured. Thanks for taking the time to...
by photonblaster
Wed Feb 23, 2011 4:42 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

Here is an interesting question for those readers who suggested my original post has little merit. Suppose I did my original post in 2006? For instance I would have done the analysis below for the Noctua NF-S12-1200, data found at http://www.silentpcreview.com/article695-page2.html#nexus At that tim...
by photonblaster
Mon Feb 21, 2011 5:00 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

=========== Can you do better by futsing with all the stuff we all obsess about here? Sure. But the above will probably produce a quiet well cooled system that will work for all but the most obsessive of us. A quiet well cooled system that, if we had it at the time, would have preventing us botheri...
by photonblaster
Mon Feb 21, 2011 4:21 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

This is quite an interesting and lengthy analysis. Excuse me if this was answered somewhere in the previous posts, but where is your justification for the linear relationship between SPL and voltage? Other than your curve fitting, that is. PartEleven, I mentioned in my original post that I had to r...
by photonblaster
Sun Feb 20, 2011 3:39 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

I read this and enjoyed it. I didn't comment. I don't understand how this has become so contentious. I haven't really rad the back and forth. I'm, interested in the DB to CFM ratios at different speeds. Is one fan producing 14db moving more or less air than two fans producing 11 DB each? Do 4 fans ...
by photonblaster
Sun Feb 20, 2011 2:20 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

man, these statistics reminds me of how one of my friend works. if you want to be that anal, etc. AH Ha, I knew there would be at least one really "right winger" in the woodworks. See my first sentence in my post. Just a quick rebuttal...this is physics, not statistics. Statistics plays a role in a...
by photonblaster
Sun Feb 20, 2011 1:58 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

There is absolutely no meaning to a value of 5db for 'the fan alone' as there is no such thing. If SPCR does a two fans on a HS test agian, give me the numbers before two fans are tested together. I will predict what the two fans toghether will measure. The fans should be good ones. like the ones a...
by photonblaster
Sun Feb 20, 2011 10:35 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

There is absolutely no meaning to a value of 5db for 'the fan alone' as there is no such thing. If SPCR does a two fans on a HS test agian, give me the numbers before two fans are tested together. I will predict what the two fans toghether will measure. The fans should be good ones. like the ones a...
by photonblaster
Sun Feb 20, 2011 9:19 am
Forum: Site Feedback
Topic: sorting topic replies in descending time order
Replies: 1
Views: 2271

sorting topic replies in descending time order

I searched this, did not find an answer.
Is there a way to PERMANENTLY set your sort order for a thread so the newest post is first?
by photonblaster
Sun Feb 20, 2011 9:13 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

It is so interesting in fact, I went back to re read the entire first post. I must say there are some major factors you did not consider. First is the one fact is these measurements are made with the fans installed on the heatsink. not just the fans in free air. This alone may tilt the findings to ...
by photonblaster
Sun Feb 20, 2011 6:42 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

photonblaster wrote: This is not yet possible, as H67 can't OC. Wait until Z68 if you want to OC and use integrated GPU. I stand corrected, I was imprecise. Pls tell me if this is a better statement: It does not really O/C, but you can increase the frequency bump step size when the CPU senses heavy...
by photonblaster
Sun Feb 20, 2011 6:18 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

I'd think it certainly is possible to get a much lower db than the floor of the spcr chamber, but it's also pretty worthless as well. Either way it's really diminishing returns when your fans are far lower noise than other things such as your actual room background noise level. I'd rather have the ...
by photonblaster
Sun Feb 20, 2011 5:51 am
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

I have not yet come across a fan that's silent for real, no matter how low the RPM. The only moving part in my system is a single fan spinning at <600RPM and I can hear it above my ambient (only faint though). The 5dBA 120mm fan doesn't exist, I guess that's my point. I agree with you re silent fan...
by photonblaster
Sat Feb 19, 2011 10:11 pm
Forum: Fans and Control
Topic: 5dBA 120mm Fan.
Replies: 55
Views: 12875

Re: 5dBA 120mm Fan.

Reader beware: This post may be received like the never ending conflict between baseball fans who seem to hate or love statistics! I am a little tone deaf, and cannot really distinguish the subtleties of fan noises when they are loud enough to hear, so in some sense I do not understand this game. B...