Search found 255 matches

by Bat
Sun Mar 14, 2010 4:51 am
Forum: Watercooling
Topic: Radiator airflow using negative pressure
Replies: 4
Views: 4284

How about trying it with your existing case and radiator, to start with? Take the fans off the radiator and use case exhaust fans to suck air through the radiator into the case. Or you could turn the fans round: positive pressure would give similar water temperatures with cooler in-case air temperat...
by Bat
Sun Mar 14, 2010 4:37 am
Forum: Watercooling
Topic: Watercooling without pump?
Replies: 14
Views: 15212

A few people have done it.
I forget the details, but you'll find examples if you search.
It's essential to have the heat-generating components lower than the radiator.
by Bat
Sun Mar 14, 2010 4:12 am
Forum: SPCR Article Discussion
Topic: SPCR's 2010 CPU Heatsink Test Platform
Replies: 123
Views: 43265

Ah, yes, that's plausible. Heatpipes are going to have nonlinear behaviour in terms of power carried as a function of temperature difference... and absolute temperature is going to matter too. So for a given heatsink if you were to draw a graph of the temperature of the processor as a function of po...
by Bat
Fri Mar 12, 2010 6:12 am
Forum: SPCR Article Discussion
Topic: SPCR's 2010 CPU Heatsink Test Platform
Replies: 123
Views: 43265

It strikes me as very odd that the rankings can change when you change nothing but the heat power input, as you do when going from stock i7 processor to overclocked. I'm having trouble believing it's real. Either there's something odd about the physics that I've failed to consider, or the apparent c...
by Bat
Sat Oct 14, 2006 12:45 pm
Forum: Watercooling
Topic: how shall I water cool a harddisk
Replies: 18
Views: 9769

You could consider a length of that soft 10mm-diameter copper piping for household plumbing, squashed against the sides of the drive enough to flatten it a bit, with some thermal paste. The idea of sealing it up and watercooling it seems sensible to me. Somewhere on here a while back I read of someo...
by Bat
Sat Jan 07, 2006 5:56 pm
Forum: Watercooling
Topic: Quietest 12v pump?
Replies: 62
Views: 62462

DougG, you say the CSP-MAG is about the same noise level as Eheim.
Which Eheim model is that?
by Bat
Sun Dec 18, 2005 10:59 am
Forum: SPCR Article Discussion
Topic: Squeezebox 3 Digital Music Box
Replies: 94
Views: 81858

"Just one folder" shouldn't really be a limitation. You can use RAID or Logical Volume Management to combine several discs or partitions into something the filesystem will treat as one, or you can use symbolic links ("shortcuts" in Windows) so that the slimserver software will see an extra folder as...
by Bat
Mon Dec 12, 2005 1:34 pm
Forum: Fans and Control
Topic: Looking for a fan control circuit that does this...
Replies: 13
Views: 4106

The rail voltage, or as close to it as the op-amp can drive its output.
by Bat
Sat Aug 20, 2005 1:28 pm
Forum: Video Cards & Monitors
Topic: Low-end PCI-E DVI for Linux (xfree86 4.3) - suggestions?
Replies: 2
Views: 1407

Thank you!

I had seen it was the cheapest PCI-E card that dabs.co.uk sell (£32 own-brand or £35 Sapphire) but X300SE isn't mentioned on http://www.xfree86.org/4.3.0/radeon.4.html
and on searching for a little while I didn't find anything telling me it would work.

Do you happen to know it does?
by Bat
Fri Aug 19, 2005 4:37 pm
Forum: Video Cards & Monitors
Topic: Low-end PCI-E DVI for Linux (xfree86 4.3) - suggestions?
Replies: 2
Views: 1407

Low-end PCI-E DVI for Linux (xfree86 4.3) - suggestions?

Building a new Linux box, I feel it makes sense to go for a PCI-E motherboard rather than AGP. The graphics card needs good resolution (1600x1200 or better) but 3D performance needn't be anything special. (DVI isn't an immediate requirement but would be nice: I'm keeping an eye on the price and qual...
by Bat
Fri Aug 19, 2005 4:01 pm
Forum: Video Cards & Monitors
Topic: Need video card that is quiet and works under Linux...
Replies: 19
Views: 5850

Does DVI support 1920x1200 though, or only up to 1600x1200?
by Bat
Mon Feb 28, 2005 9:43 am
Forum: Watercooling
Topic: Laing DDC
Replies: 18
Views: 6808

I'd love to read more about the power supply. Care to tell us (perhaps in a new thread)? I've been wondering about good ways to water-cool a PSU for a while.
by Bat
Mon Feb 21, 2005 11:23 am
Forum: Watercooling
Topic: Laing DDC differences? (DangerDen, Swiftech, others?)
Replies: 17
Views: 7734

I would rather have ten pulses per revolution anyway. Why throw away some of the detail by only reporting every tenth pulse? If necessary this can be done at a later stage by whatever software or circuit is making use of the data. The ten pulses could be particularly useful if you're wanting to make...
by Bat
Wed Dec 15, 2004 1:25 pm
Forum: General Gallery
Topic: Project QBG
Replies: 28
Views: 21992

When monitoring the pump speed, are you taking into account that the pump produces ten pulses per revolution? (I'm guessing you are, since you report 1800rpm or 30Hz, but it's as well to check.)
by Bat
Wed Dec 15, 2004 10:28 am
Forum: Watercooling
Topic: DDC pump in UK?
Replies: 3
Views: 1894

DDC pump in UK?

Has anyone seen it for sale over here?
by Bat
Wed Dec 08, 2004 7:46 am
Forum: Power Supplies
Topic: Review of 5 fanless PSUs
Replies: 3
Views: 1961

by Bat
Wed Dec 08, 2004 7:18 am
Forum: Watercooling
Topic: Reserator/Athlon64 3400+/Radeon X800XT - Best coolant????
Replies: 13
Views: 5991

Has anyone seen any evidence of Water Wetter giving improved performance? I haven't. Perhaps it does, but I'm not going to assume so. Anyway, I'd recommend just using some anti-corrosion additives in distilled or deionised water: either the "life extender" stuff for adding to the water/antifreeze mi...
by Bat
Tue Nov 23, 2004 9:03 am
Forum: Video Cards & Monitors
Topic: What's a good, silent graphics card for Linux?
Replies: 10
Views: 3160

Bear in mind that the binary-only drivers only work with certain specific kernel versions, and they are only for 32-bit i386: no use with AMD64 or other architectures.
by Bat
Tue Nov 23, 2004 8:37 am
Forum: Watercooling
Topic: what type of water for reserator...distilled or de-ionised?
Replies: 21
Views: 7776

DrJ, I agree about adding a pH buffer. I think a redox buffer would be important too, or at least a reducing agent to mop up the oxygen that's bound to seep in slowly, through little gaps or perhaps diffusing through the walls of the tubing. What are your thoughts on what to use? A phosphate buffer ...
by Bat
Tue Nov 23, 2004 8:26 am
Forum: Watercooling
Topic: what type of water for reserator...distilled or de-ionised?
Replies: 21
Views: 7776

uszobajnok, your mixture is 11.7% alcohol: about as much as in a fairly weak wine. That will help but there are various things that can survive that concentration of alcohol, including the bacteria that turn wine to vinegar if air is available (alcohol plus oxygen --> acetic acid).
by Bat
Mon Nov 22, 2004 2:52 pm
Forum: Watercooling
Topic: non-conductive fluid
Replies: 28
Views: 18714

It's designed to make it less able to support metal ions in solution If the alcohols were there as a major proportion of the mixture, that effect might start to become significant. However, if metal salts are less soluble in the solution than in water, that just means the corrosion products will en...
by Bat
Mon Nov 22, 2004 10:54 am
Forum: Watercooling
Topic: non-conductive fluid
Replies: 28
Views: 18714

With an "anticorrosive"? Not according to the link I gave above: http://www.overclockers.com/articles1028/ According to the Material Safety Data Sheet (MSDS) given to me by Integrity PC, FLuid XP+ contains * Dihydrogen Oxide, [Water] * Xanthan Gum, [CP Kelco: Keltrol-T &/or Keltrol-T622] * 1-Dodecan...
by Bat
Thu Nov 18, 2004 1:47 pm
Forum: Watercooling
Topic: non-conductive fluid
Replies: 28
Views: 18714

I'm very sceptical about that "Fluid XP" stuff, especially since finding some details (on the manufacturer's site, I think it was) and learning that it's mostly water. Also see here: http://www.overclockers.com/articles1028/ If the list of ingredients there is complete, then you shouldn't expect the...
by Bat
Thu Nov 18, 2004 1:07 pm
Forum: Power Supplies
Topic: Using an old PSU on an AMD64
Replies: 21
Views: 5379

pjeaton wrote:I'm really thinking about the quailty of the power lines. Is the 'quality something I could see on my 'scope?
It is, except that you might have trouble seeing the transients e.g. when a CD drive starts to spin up.
by Bat
Wed Nov 17, 2004 12:32 pm
Forum: Watercooling
Topic: My cooling towers(pics), not finished.
Replies: 12
Views: 5893

Could try the tall chimney with cardboard or whatever first to see how well it works, only changing to something prettier if successful.
by Bat
Tue Oct 19, 2004 8:59 am
Forum: Watercooling
Topic: Eheim Mod. ?
Replies: 7
Views: 3124

That's good to know! It makes me wonder why it wasn't made that way in the first place, though. They must have made that choice for some reason.
by Bat
Tue Oct 19, 2004 8:50 am
Forum: Watercooling
Topic: Interesting new WC kit
Replies: 7
Views: 2874

All sound measurements at overclockers.com are taken at 8", so it's consistent and easy and not too affected by background noise. Not unreasonable at all. As for the block, I don't know what it's like but here is the inside of a slightly cheaper block from the same company: http://www.1a-cooling.de/...
by Bat
Tue Oct 19, 2004 8:22 am
Forum: Watercooling
Topic: My home made silent(no fans) watercooled PC, almost finished
Replies: 22
Views: 7836

For that much dust, sealed water-cooled cases with external radiators sound like a good idea. On the other hand, external radiators are not what you want for something that has to be carried about a lot.
by Bat
Tue Oct 19, 2004 8:15 am
Forum: Watercooling
Topic: My cooling towers(pics), not finished.
Replies: 12
Views: 5893

Looks smart. Suggestions: 1. Extend the tubes downwards almost to the bottom of the fins. 2. Extend the tubes upwards as high as possible (perhaps to a foot below the ceiling) and you might find you no longer need fans. If you do this, it would also help to make the tubes wider in the section above ...
by Bat
Tue Oct 19, 2004 7:06 am
Forum: Fans and Control
Topic: Calling All Good Fans!
Replies: 143
Views: 281513

Are you including any "blower" or "water wheel" style fans? They can be used in small spaces where otherwise a 60mm or smaller fan would be needed, and I think they usually have higher pressure than axial fans (good for radiators). Some of them have impressive specifications from the manufacturer, e...