Search found 26 matches

by Johnsy
Tue Nov 20, 2012 3:49 pm
Forum: SPCR Article Discussion
Topic: Intel Next Unit of Computing Kit DC3217BY
Replies: 36
Views: 21869

Re: Intel Next Unit of Computing Kit DC3217BY

In the last half hour or so, I've tried my USB 2.0 Windows 7 installation flash drive on USB 3.0 ports on several newer boards... and discovered they all work. So... my original comment in the article was based on limited info; I've retracted the comment. Sorry for any confusion. Nice to see it wor...
by Johnsy
Tue Nov 20, 2012 3:37 pm
Forum: SPCR Article Discussion
Topic: Intel Next Unit of Computing Kit DC3217BY
Replies: 36
Views: 21869

Re: Intel Next Unit of Computing Kit DC3217BY

In order to comply with USB 3.0, a port (and hence its controller) MUST be capable of operating in full accordance with the USB 2.0 spec - which obviously includes the driver. Got a reference for that? Well, it's mentioned repeatedly throughout the spec (http://www.usb.org/developers/docs/usb_30_sp...
by Johnsy
Tue Nov 20, 2012 3:17 pm
Forum: SPCR Article Discussion
Topic: Intel Next Unit of Computing Kit DC3217BY
Replies: 36
Views: 21869

Re: Intel Next Unit of Computing Kit DC3217BY

But the USB controller will have been acting as a USB 2.0 device throughout. It will be using the parallel High-Speed bus (the "USB 2.0" part of the USB 3.0 link). Superspeed is not part of the picture here. In order to comply with USB 3.0, a port (and hence its controller) MUST be capable of operat...
by Johnsy
Tue Nov 20, 2012 2:45 pm
Forum: SPCR Article Discussion
Topic: Intel Next Unit of Computing Kit DC3217BY
Replies: 36
Views: 21869

Re: Intel Next Unit of Computing Kit DC3217BY

Olaf van der Spek wrote: USB3 controllers support USB2 devices, but that doesn't imply USB3 controllers can be 'driven' by USB2 drivers.
Well, no, of course it doesn't - but I fail to see what that has to do with anything. Why on Earth would a USB 3.0 device have a USB 2.0 driver?
by Johnsy
Tue Nov 20, 2012 2:04 pm
Forum: SPCR Article Discussion
Topic: Intel Next Unit of Computing Kit DC3217BY
Replies: 36
Views: 21869

Re: Intel Next Unit of Computing Kit DC3217BY

"The tickle here is that only-USB 3.0 would mean there's no easy way to install most operating systems, as native USB 3.0 support is found only in Windows 8."

USB 3.0 is backward compatible with USB 2.0, so that shouldn't really matter.
by Johnsy
Fri May 13, 2011 3:49 pm
Forum: Cases and Damping
Topic: PaQ (Powerful and Quiet) case
Replies: 5
Views: 1483

Re: PaQ (Powerful and Quiet) case

Hi,

The designer of the PaQ case, Peter Cyriax, fell ill a couple of years ago. Not only did he design this excellent case, but was a tireless contributor to both the SPCR (username: PCY) and SOS (Peter C) forums.
by Johnsy
Fri Apr 08, 2011 7:25 am
Forum: System Advice / Troubleshooting
Topic: Will this quiet system run cool enough?
Replies: 9
Views: 1009

Re: Will this quiet system run cool enough?

fumino wrote:googlefu has failed you.
Then I shall never use it again!
by Johnsy
Fri Apr 08, 2011 2:37 am
Forum: System Advice / Troubleshooting
Topic: Will this quiet system run cool enough?
Replies: 9
Views: 1009

Re: Will this quiet system run cool enough?

As far as I can ascertain, the Mugen 2 is not compatible with LGA1155. I don't know where you got this from. There is a known problem with some specific motherboards e.g. Asus P8P67 Deluxe, but there is a solution http://www.scythe-eu.com/forum/mainboard-compatibility/764-mugen-2-mugen-2-rev-b-comp...
by Johnsy
Fri Apr 08, 2011 12:58 am
Forum: System Advice / Troubleshooting
Topic: Will this quiet system run cool enough?
Replies: 9
Views: 1009

Re: Will this quiet system run cool enough?

As far as I can ascertain, the Mugen 2 is not compatible with LGA1155.
by Johnsy
Wed Apr 06, 2011 12:44 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

Obviously it's your decision, but as I said before, even with the Winmate rather than the PICO, and even with the 5670 (AMD TDP for reference card = 64W) rather than the 9800, you'll have basically zero (or less!) headroom.

Personally, I wouldn't even consider doing this.
by Johnsy
Tue Apr 05, 2011 4:03 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

The specific method doesn't really matter. Split two cables using whatever. It's not rocket science but it takes a bit of skill. As I said it takes a bit of tweaking to make the most of the picoPSU as the power draw approaches "normal" where a regular ATX PSU also could be considered. Going into th...
by Johnsy
Tue Apr 05, 2011 3:24 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

Vicotnik wrote: I split incoming +12v, feeding ATX 4-Pin 12V power connector and the picoPSU in parallel.
I was thinking more about the actual physical details: cables, connectors etc. I'd really appreciate it if you could run me through your method.
by Johnsy
Tue Apr 05, 2011 2:38 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

The quote in my post above is mistakenly attributed to Ashex rather than Vicotnik. Apologies.
by Johnsy
Tue Apr 05, 2011 2:35 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

Ditch the graphics card and you don't have a problem.
Ashex wrote: It's possible to feed stuff that needs 12v directly from the brick, bypassing the picoPSU
Interesting. Have you actually done this in practice? If so, how?
by Johnsy
Tue Apr 05, 2011 1:12 pm
Forum: System Advice / Troubleshooting
Topic: Low power Sandy Bridge Mini-ITX build
Replies: 91
Views: 12888

Re: Low power Sandy Bridge Mini-ITX build

Don't forget that although the PICO XT-160 is rated for a total output of 160 Watts, it's only rated for 8A on the 12V line. 8 x 12 = 96W. Then remember that virtually everything in the build you specify - CPU, GPU and mobo/memory - will be running off that 12V line. For these SFF builds, I personal...
by Johnsy
Mon Feb 28, 2011 1:00 pm
Forum: SPCR Article Discussion
Topic: HDPLEX H10 Fanless microATX Case
Replies: 26
Views: 8860

Re: HDPLEX H10 Fanless microATX Case

The caption beneath the first photo on page 2 reads: Like most fanless cases, a series of aluminum fins stick out at the sides to dissipate heat. They are 5.0 cm thick at the base and 3.1 cm at the tip. I think that should be 0.5cm and 0.31cm Or rather mm, rather than cm. Quite so. Thank you.
by Johnsy
Fri Feb 25, 2011 5:25 pm
Forum: SPCR Article Discussion
Topic: HDPLEX H10 Fanless microATX Case
Replies: 26
Views: 8860

Re: HDPLEX H10 Fanless microATX Case

The caption beneath the first photo on page 2 reads:

Like most fanless cases, a series of aluminum fins stick out at the sides to dissipate heat. They are 5.0 cm thick at the base and 3.1 cm at the tip.

I think that should be 0.5cm and 0.31cm
by Johnsy
Thu Sep 30, 2010 2:48 pm
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: Puget Serenity SPCR Edition v.2
Replies: 50
Views: 15866

[quote="MikeC"]Johnsy -- That 55C temp you cite is surely for the operating environment -- not for specific chip temps on the board. You're right, of course. (Interestingly, every server/workstation board I'm aware of - single and dual CPU alike, whether Intel, Supermicro or Tyan - calls for a rathe...
by Johnsy
Thu Sep 30, 2010 10:35 am
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: Puget Serenity SPCR Edition v.2
Replies: 50
Views: 15866

Re: Have to disagree

Surely an increase in mainboard temp. of more than 25% at idle (38C v 30C) and of more than 55% (55C v 35C) under Prime95 is huge? Erm... you do realise that the Centigrade/Celsius temperature scale has a quasi-arbitrary zero-point? You can't sensibly make arguments about percentage rises in temper...
by Johnsy
Thu Sep 30, 2010 10:04 am
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: Puget Serenity SPCR Edition v.2
Replies: 50
Views: 15866

Re: Have to disagree

I wasn't suggesting that the machine was dangerously undercooled. That's what it sounded like to me... Here's my original post in it's entirety: Huge rises in several key temperatures compared to the original, making this machine simply the "or" in the eternal either/or of thermal/acoustic performa...
by Johnsy
Thu Sep 30, 2010 2:50 am
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: Puget Serenity SPCR Edition v.2
Replies: 50
Views: 15866

Re: Have to disagree

Huge rises in several key temperatures compared to the original, making this machine simply the "or" in the eternal either/or of thermal/acoustic performance. Not really. The earlier sample was too conservative, wasting thermal headroom. The new version is closer to the limits... but who runs Prime...
by Johnsy
Wed Sep 29, 2010 6:14 pm
Forum: Quiet Prebuilt, SFF and Barebones Systems
Topic: Puget Serenity SPCR Edition v.2
Replies: 50
Views: 15866

Have to disagree

Huge rises in several key temperatures compared to the original, making this machine simply the "or" in the eternal either/or of thermal/acoustic performance.
by Johnsy
Tue Feb 23, 2010 6:06 am
Forum: SPCR Article Discussion
Topic: Zalman CNPS10X Flex CPU Cooler
Replies: 9
Views: 15197

In the 2010 Heatsink Test Platform thread, someone points out that only two memory DIMMs are being used on a triple-channel capable platform. If the photo of the Zalman CNPS Flex installed on the motherboard is correct, those two DIMMs are both on channel A, giving single channel performance. Person...
by Johnsy
Thu Jan 28, 2010 8:38 pm
Forum: SPCR Article Discussion
Topic: SPCR's 2010 CPU Heatsink Test Platform
Replies: 123
Views: 39110

Can C/W from one test be used to predict HS behavior with a hotter or cooler CPU If it can't, then what's it for? and to what range And there, I think, is the rub. I personally have always valued C/W figures, but the testing on the new platform has caused me to consider more closely something I pre...
by Johnsy
Thu Jan 28, 2010 6:32 pm
Forum: SPCR Article Discussion
Topic: SPCR's 2010 CPU Heatsink Test Platform
Replies: 123
Views: 39110

How exact does it need to be? Taking a set of reasonable notional values for the i7, along with the measured temp. rise at 7V, shows that the lower the load actually is , the worse any derived coefficient will be. 42/86 = 0.48 42/100 = 0.42 42/110 = 0.38 42/120 = 0.35 42/130 = 0.32 (All in deg.C/W) ...
by Johnsy
Thu Jan 28, 2010 5:18 pm
Forum: SPCR Article Discussion
Topic: SPCR's 2010 CPU Heatsink Test Platform
Replies: 123
Views: 39110

heat/power coefficient

The biggest casualty of the new platform is the notion that a universalized cooling coefficient (deg.C/W) can be derived for a specific heatsink employing a specific fan at a specific speed. Take the Megahalems for example. With a heat source of ~78W (D950), we get a coefficient of 0.22 deg.C/W when...