Search found 22 matches

by rjm
Wed Apr 15, 2009 4:57 pm
Forum: Deals, Vendors and Classifieds
Topic: Samsung SLC SSD's are Cheap at Geeks--64GB now OOS
Replies: 22
Views: 13082

Yeah, the next set of SSDs from Samsung are MLC but considerably faster (~200MB/s). These SLC drives are about to be obsoleted hence the blowout pricing.
by rjm
Mon Sep 25, 2006 8:17 am
Forum: CPUs and Motherboards
Topic: AMD A64 X2 TDP Poll
Replies: 75
Views: 98233

AMD Athlon 64 X2 3800+ (Manchester) Rev BH9-E4, 1.350v, 63C, 65.6 Watts TCaseMAX is equal to the CPU power drawn at max Vcc Icc, multiplied by the thermal junction resistance of the CPU package (and stock heatsink presumably), and added to the reference ambient temperature, as chosen by AMD, of 42 o...
by rjm
Mon Sep 25, 2006 7:17 am
Forum: The Silent Front
Topic: Ionic Breeze PC Cooling rig
Replies: 84
Views: 105882

We're getting off topic but no a heatpipe isn't a heatpipe unless its hollow and filled with a volatile liquid. Someone once drilled a hole in one to deliberately leak the fluid out (just to check, y'know) and his heatsink promptly became useless. Copper may have good thermal conductivity but its st...
by rjm
Sat Sep 23, 2006 5:26 am
Forum: The Silent Front
Topic: Ionic Breeze PC Cooling rig
Replies: 84
Views: 105882

Strikes me as being simpler to just build the thing from spare parts and be done with it. A sewing needle, a port from a loudspeaker, some conductive graphite based paint or spray, and the HV power supply from a commercial ionizer... Oh and lets actually verify it moves air before inserting into the...
by rjm
Fri Sep 22, 2006 3:48 pm
Forum: The Silent Front
Topic: Ionic Breeze PC Cooling rig
Replies: 84
Views: 105882

0.3 CFM/W. My bad. Also at lower voltages, 7kV, while the airflow is only 300 lfm the efficiency climbs to a respectable 4 CFM/W. So setting aside Rusty"s reservations about backpressure for the moment, its starting to look at least feasible from an energy point of view. A few watts might give 10-30...
by rjm
Fri Sep 22, 2006 8:13 am
Forum: The Silent Front
Topic: Ionic Breeze PC Cooling rig
Replies: 84
Views: 105882

As the U. Washington paper linked earlier describes it, you can get semi decent airflow to the tune of 600 lfm (2-3 m/s), but at those velocities the efficiency is 0.03 cfm/watt, or two orders of magnitude less than a mechanical CPU cooler fan. A quick and dirty estimate first: if a 120mm fan at 160...
by rjm
Mon Aug 23, 2004 5:00 am
Forum: Silent Storage
Topic: Hitachi Deskstar 7k250 Hard Disk - Notes
Replies: 9
Views: 4711

Speed

I can't see any slight difference in performance between 80Gb/platter 7200rpm drives being important. For the same buffer size and interface, the speed between different brands won't be an issue for most people. As for the meow, just goes to show how differently people react. Its half a second, and ...
by rjm
Sun Aug 22, 2004 10:47 am
Forum: Silent Storage
Topic: Hitachi Deskstar 7k250 Hard Disk - Notes
Replies: 9
Views: 4711

Hitachi Deskstar 7k250 Hard Disk - Notes

I bought the 160Gb, 8MB Cache version for an external Firewire enclosure. I'd considered the Seagate 7200.7 and various Samsung drives as alternatives. I went with the Hitachi for two reasons: - it has switchable AAM (unlike Seagate) - it has switchable power modes, useful for a external drive where...
by rjm
Wed Aug 18, 2004 3:56 am
Forum: The Silent Front
Topic: Review of Commell Pentium M desktop board
Replies: 17
Views: 7782

fanless P-M, I got fanless P-M!

Maybe the solution is to disassemble a pentium M laptop that was going spare - broken display or something. My laptop is issentially fanless: with the processor in Speedstep, the fan never comes on. With it on set at 1.3 Ghz, it will only come on on high stress loading, DIVX movies and so forth, and...
by rjm
Tue Jan 20, 2004 5:11 am
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: VoodooPC fanless Athlon64 3200+ PC <20dB!
Replies: 7
Views: 7818

If they had one, why wouldn't they just whup Silentmaxx in the silent PSU market? Maybe it is connected to the case heatsink as well? Presumably it is. Sure its expensive, but think of it has a hushPC with a completely top-of-the-line kick-butt system inside and the price is entirely reasonable. Th...
by rjm
Tue Jan 20, 2004 4:49 am
Forum: Notebook Systems
Topic: Quiet & cheap laptop ? HP NX9005 ?
Replies: 3
Views: 6350

That was my problem ...

Online shopping means you can't check the noise in advance. As I mention in another post here my X31 is silent when the Pentium M is in stepping mode, and very quiet even at full bore. The base model is $1350 US. Its a nice machine, with a magnesium case and titanium alloy top. Excellent keyboard, t...
by rjm
Tue Jan 20, 2004 4:35 am
Forum: Notebook Systems
Topic: This laptop is quiet: IBM Thinkpad X31
Replies: 5
Views: 8327

This laptop is quiet: IBM Thinkpad X31

I gave up waiting for the Pentium M to ever arrive in a SFF desktop, so I went out and got me the ultraportable X31 from IBM. I bought it online, sight unseen, so I was anxious to see how loud it would be. The specs read 41 db, not especially encouraging. (2884BNU, Pentium-M 1300 Mhz, 20 Gig, 256 MB...
by rjm
Tue Jan 20, 2004 4:12 am
Forum: The Silent Front
Topic: 'System in a heatsink'
Replies: 10
Views: 4179

Right idea, wrong computer

You can probably put 20W or so into a heatsink like that, but I doubt the case is being put to its full use.

Building a real (read: with modern CPU) PC into a heasink though is a nice, and perfectly do-able idea especially with Pentium M. Nobody has done it yet outside of a laptop though.
by rjm
Wed Nov 12, 2003 3:15 am
Forum: CPU Cooling
Topic: CPU Diode vs. Motherboard Thermal Sensor, Difference?
Replies: 1
Views: 1725

CPU Diode vs. Motherboard Thermal Sensor, Difference?

If this has come up before I'm sorry I couldn't find it. MBProbe on Netvista x40 reports three temperatures, the CPU diode (from the Socket 370 Pentium III) and two thermistors: one is placed under the CPU, in the middle of the socket, the other at a random place on the motherboard, a few cm away fr...
by rjm
Tue Nov 11, 2003 5:24 am
Forum: The Silent Front
Topic: A Silent PC - notebook technology the answer?
Replies: 4
Views: 2432

Re: A Silent PC - notebook technology the answer?

Two comments: (1) I have an IBM Thinkpad 600e notebook and its HDD is noisy as hell... (2) I have an EPIA M10K with a Castronic CheckerCube. The noisiest part was the CPU fan. I replaced it with a Panfalo. I almost can't hear the PSU's fan. :D Can it be further quieted? I think so, but it has to be...
by rjm
Tue Nov 11, 2003 5:10 am
Forum: The Silent Front
Topic: IBM Netvista x40 all-in-one CPU temps : question for owners!
Replies: 1
Views: 1822

Oh, and anoter thing about the CPU fan -

Ok, this is gonna sound stupid, but I can't remember if the CPU fan is supposed to blow into or out from the heatsink. I have it mounted now blowing into the HS - the normal way, and I think the way it was originally - but perhaps, since it is in effect both the CPU and the case fan, I should mount ...
by rjm
Tue Nov 11, 2003 4:44 am
Forum: The Silent Front
Topic: IBM Netvista x40 all-in-one CPU temps : question for owners!
Replies: 1
Views: 1822

IBM Netvista x40 all-in-one CPU temps : question for owners!

My model 2179-700 has been modded in the following ways: stock HDD replaced with Seagate barracuda IV 40 Gb stock Celeron 533 replaced with PIII 677 I'm running mbprobe v. 1.3 to monitor the temps, voltages and fan rpms. The IBM motherboard uses the SiS 950 harware monotoring "super IO" chip. Unfort...
by rjm
Fri Nov 07, 2003 2:08 am
Forum: The Silent Front
Topic: Intel Pentium M - So Close!
Replies: 83
Views: 36802

Pentium M - coming soon(ish)

Really, imagine the energy savings if corporations went with Pentium M instead of Pentium 4 desktop systems. That *may* be enough to drive the market, guess it depends on the oil prices... Prices on the Pentium M will definitely drop significantly in the next six months, to the point where it it wor...
by rjm
Thu Nov 06, 2003 6:49 am
Forum: The Silent Front
Topic: A Silent PC - notebook technology the answer?
Replies: 4
Views: 2432

A Silent PC - notebook technology the answer?

I like this site, just as I like the idea of silent computing. So please bear with me while I take this moment to share with you some of my frustrations. If a computer was engineered from the beginning to be silent it would be a trivial task. The recipe would be something as follows: Take the guts o...
by rjm
Wed Oct 29, 2003 3:30 am
Forum: CPU Cooling
Topic: Smaller copper heatsink for PIII
Replies: 2
Views: 1751

Actually, 25mm was for the dimension of the heatsink by itself. The CPU fan is attached to the case rather than the HS in my IBM Netvista, and it sits directly over the heatsink leaving just enough room for a stock intel-like 25mm heatsink. Unfortunately most everything else is taller.

-rjm
by rjm
Tue Oct 28, 2003 6:00 am
Forum: CPU Cooling
Topic: Smaller copper heatsink for PIII
Replies: 2
Views: 1751

Smaller copper heatsink for PIII

Would anyone be able to recommend a copper heatsink for socket A / 370 which stands only about 25 mm high? Basically something the same dimensions as the stock Intel but in copper.

Vantec CCK-6027D?

TIA

rjm
by rjm
Fri Mar 21, 2003 12:49 pm
Forum: Power Supplies
Topic: PSUs with no coil whine
Replies: 11
Views: 5524

Coil whine and buzz

Good to know it isn't just me. I'm running a Seasonic 250W connected to the EPIA 5000 and Barracuda IV. The power draw is minimal so I can get away with it fanless since everything is in an open frame system. Plenty of airflow. But, yes, the biggest.. or at least most annoying.. noise is the coil bu...