Search found 1270 matches

by silvervarg
Mon Oct 04, 2004 2:57 am
Forum: The Silent Front
Topic: Good news about AMD 90nm power consumption...
Replies: 12
Views: 3399

Smaller manufacturing process means smaller chips, but that is usually compensated by using more transistors. The end results is often close to zero change in chip area. Over a long timeline (30 years) we have seen an increase in chip area used for CPU's, but variations have been quite large, so if ...
by silvervarg
Mon Oct 04, 2004 1:14 am
Forum: The Silent Front
Topic: Good news about AMD 90nm power consumption...
Replies: 12
Views: 3399

The article looks interesting, but since it is so short they have missed out on some of the details that could be important. Assuming the system uses about 50W power without the CPU then the difference is about 25% between the 90nm and the 130nm in the Tech Report test. In the Suhidan article they m...
by silvervarg
Mon Oct 04, 2004 1:00 am
Forum: The Silent Front
Topic: New Technology Canon/Toshiba Display
Replies: 6
Views: 2002

It seems that they are targeting 40 inch and bigger models only with the SED technology. That seems to bee a bit big for the computer screen, so it seems that LCD will rule normal monitors for quite a while. For a big TV in the living room it sure sounds nice to have a 40+ inch screen with crisp ima...
by silvervarg
Mon Oct 04, 2004 12:30 am
Forum: Power Supplies
Topic: How many rails?
Replies: 6
Views: 1881

The CPU has its own power regulation on board, so it should do fine even if the voltage on the 12V line varies quite a bit, so with a good motherboard I would guess that the power to the CPU is one of the least critical to remain stable. Splitting the power in several rails (assuming the total amps ...
by silvervarg
Sun Oct 03, 2004 11:50 pm
Forum: CPU Cooling
Topic: Any plans for dealing with dual cores?
Replies: 9
Views: 2341

hopefully two mobile XP's will be sufficiently cheaper than an equivalent dual core This probably depends a lot on your timeframe. AMD has announced dual core versions to come out 2H05, so they will hit the market about a year from now. At first they will like all new CPU's be quite expensive. It s...
by silvervarg
Sun Oct 03, 2004 11:38 pm
Forum: Fans and Control
Topic: suggestion: howto measure Fan output CFM...?
Replies: 2
Views: 782

A few people have tried this technique and a few very similar, like taping a small weight on top of the bag and see how high it will life up. Do a few seaches and you will find a few threads. The major problem is that you will get lots of pressure from the bag, so the speed will decrease as the bag ...
by silvervarg
Sun Oct 03, 2004 11:26 pm
Forum: Fans and Control
Topic: Changing fan connector
Replies: 4
Views: 1622

In most cases this will work fine. I would first check out the rated current draw of the fan (typically printed on the fan label). E.g. 0.2A If you are really lucky you can find the maximum current draw from your motherboard fan headers in the manual for the motherboard. If you can't find it a typic...
by silvervarg
Sun Oct 03, 2004 11:20 pm
Forum: Fans and Control
Topic: fans in series size/speed compatability
Replies: 9
Views: 2762

First of all you might get a problem with using an automatic (temp controlled) fan for the intake. The intake air will probably stay about the same, so the fan will typically always run at the same speed. Chanses that this speed is the same as the speed you want is very slim. A better option is prob...
by silvervarg
Fri Oct 01, 2004 5:32 am
Forum: The Silent Front
Topic: One-Fan Computer. It's complete and cool/quiet!
Replies: 53
Views: 30206

one would be to cut vent holes in a std 120mm fan PSU (imitating the Rosewell design with a steel PSU). If you can't get hold of the PSU you want right away this would be the way I would go. I would probably pick the lazy route to cut round holes and place normal fan grills on the holes. A slightly...
by silvervarg
Fri Oct 01, 2004 5:06 am
Forum: The Silent Front
Topic: Straightening heatpipes
Replies: 9
Views: 3699

I suggest that you have some kind of mold that is hard and can withstand heat that has the shape you want. Mold should be split in two pieces. Fasten each side of the mold to a vice. Heat up the part of the heatpipe to straiten to 100-200 C. Put the pipe in the mold and start to close the vice slowl...
by silvervarg
Fri Oct 01, 2004 4:56 am
Forum: The Silent Front
Topic: firewire/usb hdd relocation
Replies: 9
Views: 1887

I believe large files are where 1394 really starts to shine compared to USB 2.0. I think it takes a pretty fast drive to max out a firewire connection. The strange thing is that a single drive should not even be close to maxing out an USB2.0 connection, still it does in practical tests show bad res...
by silvervarg
Thu Sep 30, 2004 1:28 am
Forum: The Silent Front
Topic: firewire/usb hdd relocation
Replies: 9
Views: 1887

I recently read a test of a HDD enclosere with USB2.0 in Swedish. The conclusion from that test is that you didn't loose too much in performance when you where reading lots of small files (random access), but as soon as you read bigger files you dropped to 50-60% of the performance of the normal ATA...
by silvervarg
Thu Sep 30, 2004 1:04 am
Forum: The Silent Front
Topic: One-Fan Computer. It's complete and cool/quiet!
Replies: 53
Views: 30206

Sounds like a quite good plan that I think will work very well. Since you have no direct path out from the PSU fan you have very good possibilities to put some dampening materials to absorb the noise from the fan. If you mount the HDD close to the bottom intake and have most of the other openings in...
by silvervarg
Thu Sep 30, 2004 12:51 am
Forum: Power Supplies
Topic: *Shd I be worried about burn marks on mobo power connectors?
Replies: 18
Views: 3966

I agree with Sthayashi. You should defenatly connect the red wire on the multimeter to the "V" port when measuring volts or resistance. The black wire should always be connected to the COM port redargless of what you measure. When you measure voltage the multimeter should be close to infinite resist...
by silvervarg
Wed Sep 29, 2004 12:03 am
Forum: CPU Cooling
Topic: Any plans for dealing with dual cores?
Replies: 9
Views: 2341

But and it is a big BUT with Intels CPUs reaching 120 watts thermal output at full load for the current fastest CPUs that would wind up at the substantial sum of 160 watts Well, if you look at it from a CPu manufacturers perspective: Lets assume you have a CPU core A with 100% performance and 100% ...
by silvervarg
Tue Sep 28, 2004 11:53 pm
Forum: CPU Cooling
Topic: G4 power consumption?
Replies: 6
Views: 1916

OS X is so much beyond any other OS Could you explain this a bit further? As far as I know OS X is basicly a normal Unix core with more or less a skin of top to get a Mac look and feel and it has a nicely build in emulator to run old Mac software. So, what is the major difference between OS X and a...
by silvervarg
Mon Sep 27, 2004 12:30 am
Forum: The Silent Front
Topic: Why no Pentium-M MoBo ?
Replies: 18
Views: 5454

Doesn't this Pentium-M board look a bit strange? It is missing the normal Motherboard power connector! It has the 4-pin square connector and a Molex connector on board. Very odd configuration. I guess they need some kind of special connector that goes to one of the small connectors or something simi...
by silvervarg
Mon Sep 27, 2004 12:03 am
Forum: Power Supplies
Topic: PSU Mod, and it all goes down
Replies: 7
Views: 2020

It is likely that connecting the +12V to the fan tach will have blown the fan tach circuitry, and possibly something more on the fan. The PSU should be short curcuit protected, so chanses that you blew the PSU is rather small. If the PSU contains a fuse you might have blown that one. I would however...
by silvervarg
Sun Sep 26, 2004 11:19 pm
Forum: CPU Cooling
Topic: Various questions about "heatspreaders"
Replies: 4
Views: 999

The main reason for heatspreaders to be aluminium is probably mainly because it is easier to work with in the manufacturing process. The small size and thickness would make the material cost difference to copper very small. Copper would perform a bit better, but the main drop in heat transfer comes ...
by silvervarg
Sun Sep 26, 2004 10:58 pm
Forum: CPU Cooling
Topic: Battle of the titans: Aerocool HT-101 Vs SP-97 + Nexus 92
Replies: 21
Views: 4171

If you read that review, you see that both the Sharkoon and SP-97, scored a little bit better than the HT-101, but, in contrast to the HT-101, they do not have a cage which decrease the heat transfer space of the fins with their surrounding. This might lead one to think, that by removing the plasti...
by silvervarg
Sun Sep 26, 2004 6:14 am
Forum: Fans and Control
Topic: Another automatic PWM fan controller
Replies: 10
Views: 2767

The specification for that controller looks very promising. Loads of fans can be driven (5+3 externals). 3 temperature sensors might be a bit short for controlling this many fans. I would have prefered if they had made the board with the PCB (without connectors) to fit in the PCI slot. The way it lo...
by silvervarg
Fri Sep 24, 2004 6:11 am
Forum: CPU Cooling
Topic: 90nm Athlon 64 3500+ reviewed
Replies: 2
Views: 1187

Sounds like they got the same current leakage problem that Intel struggled with for quite a while. The current leakage starts to raise rapidly at this level, so I guess it is a matter of making some places a bit thicker and increasing the gaps between lines in some places. This might not sound like ...
by silvervarg
Tue Sep 21, 2004 11:40 pm
Forum: CPU Cooling
Topic: passive cooling + peltier?
Replies: 9
Views: 2671

if they could remain intact up to say 300C then yeah, you'd be able to use a fairly small heatsink/radiator on the hot side to get rid of a lot of heat. Would you be comfortable with a 300C heatsink in your computer? Imagine what happens if a cable happens to touch the heatsink. Or if you touch it ...
by silvervarg
Tue Sep 21, 2004 11:27 pm
Forum: CPU Cooling
Topic: ASUS mothboard "unlocks" P4 multiplier
Replies: 1
Views: 843

ASUS mothboard "unlocks" P4 multiplier

Asus presents a new technique called "CPU Lock Free". It allows you to change multiplier freely from 14 to 18 on sockel 478 and sockel 775 (LGA) boards.
Read more about the news on Asus news page
by silvervarg
Tue Sep 21, 2004 4:18 am
Forum: The Silent Front
Topic: Acoustilock Noise Reduction Cabinets - Studio Rated
Replies: 4
Views: 1738

Similar cabinets have been discussed a few times before, but perhaps not this particular brand. According to their site they don't recirculate the same air. They have an air intake that routes the air through a labyrinth so most of the noise don't come out through the air intake (almost same thing w...
by silvervarg
Tue Sep 21, 2004 3:57 am
Forum: The Silent Front
Topic: Cheap 90 nm 939 pin A64 out soon
Replies: 22
Views: 5676

Mki: If the 90nm dual core processors put out 105W of heat, a similar 90nm single core processor would have TDP of: 105W / 2 = 52.5W I strongly doubt that the dual cores will put out 105W. AMD seems to be quite determined to stay below 100W of heat. I think this has a lot to do with the reactions t...
by silvervarg
Tue Sep 21, 2004 3:33 am
Forum: Power Supplies
Topic: Antec Sonata PSU vs. Nexus?
Replies: 11
Views: 2673

The sonata PSU has many things similar with the Antec Truepower 380 except that it only has one fan. So it is likely to have same quality grade as Truepower 380 (that is grade 6). It is a bit less noisy, so noise is probably about grade 7. So the Sonata PSU (Q=6, N=7) (Estimated) Nexus NX-3000 (Q=7,...
by silvervarg
Mon Sep 20, 2004 12:28 am
Forum: The Silent Front
Topic: Awesome new keyboard extremely quiet except for space bar...
Replies: 31
Views: 12729

Silvervarg: I doubt the things most people do from home is that interesting to justify the work to snoop them. Lenny: Passwords and credit card numbers. DonP: UNIX logins, Windows logins, (root passwords), VPN logins, website logins.. There are all kinds of information, on top of banking details, t...
by silvervarg
Sun Sep 19, 2004 11:08 pm
Forum: Fans and Control
Topic: Capacitator PWM fix?
Replies: 3
Views: 1128

The article suggests to put the capacitor before the PWM driving transistor. This is only possible to do when you are construcing the controller, so it is not a good option for a DIY fix. The classic DIY fix is to just put a capacitor in parallell with the fan with capacitor plus to fan +12V. With t...
by silvervarg
Sun Sep 19, 2004 10:54 pm
Forum: Fans and Control
Topic: Is there a Full-On/Full-Off Thermostat-type Circuit?
Replies: 21
Views: 5852

I believe R1 is an NTC resistor, so it changes with temperature. For testing the circuit it would be easier to put in a 100k pot as you suggested.
VR1 is supposed to be a pot, and this is what you use to adjust the temperature threashold.