] [Thread Prev
Re: OT: Power PC Laptop
Thanks Rainer. That's extremely helpful. I had also read that Windows 7
appears to be the most stable operating system, especially when running
Ableton Live. I own a Fireface 400 audio interface and intend to use this
unit with the chosen laptop system. The ADK laptops certainly look
interesting. Thanks for the link.
----- Original Message -----
From: "Rainer Straschill" <email@example.com>
Sent: Sunday, February 07, 2010 5:32 PM
Subject: Re: OT: Power PC Laptop
> Ricky Graham schrieb:
>> I'm considering a power pc laptop (i7 Quad core 8GB). I'm looking at
>> HP DV7t quadcore series. Does anyone have any knowledge of any HP as a
>> live performance machine?
> Guess you're referring to the (Clarkfield) 720QM - which by its
> price in the "processor power per money" is second only to the i5-520M,
> however even beats it in the available notebook systems (the performance
> increase by roughly 45% comes with a price increase in the 20% range).
> The multicore vs. single core argumentation, as someone else already
> mentioned, is not as simple as suggested I'm afraid; there's a lot of
> things to factor in - apart from the softsynths and effects he mentions,
> also the VST host and the operating system, together with the specific
> kind of processor you're using.
> From a purely theoretical approach, for Windows users the best way to go
> is Windows 7. The reason: Windows 7 is the first (Windows?) OS to
> efficiently make use of the (i7) hyperthreading architecture - with XP
> Vista, you might end up with not-multicore-optimized applications
> running slower on a i7 architecture than on a i5 (or older) one. This
> however has been addressed in Windows 7.
> Another important factor is the VST host: even if the individual plugins
> do not make use of multicore architecture, it is often sufficient if the
> host does: say you're running two softsynths and four effects, then the
> host can easily distribute those evenly among the cores if it has that
> Finally, the i7 architecture allows to boost cores specifically if
> are unused: taking again the Clarksfield example of the 720QM, if you're
> only running two cores, you get a 798MHz boost on those - and if you
> assign your (not-multicore-enabled) application to one core and the
> driver to another one, you can redline the application core and still
> extremely low latencies...
> This is, basically, all a lengthy email to tell you that I don't have
> experiences with the dv7 family (or HP notebooks in general). One thing
> look for for audio hardware (just mentioning that in case you're not
> of that) is a characteristic called "DPC latency". Basically, it means
> long it takes for some procedure calls to be processed, and for proper
> audio stuff, this should be constantly below 1ms.
> Alas, only a few sites have started to test for that (e.g.
> notebookcheck.de - German), and typically the manufactures don't. But if
> you have the chance to have a look at the dv7 in a shop, be sure to run
> the following program:
> And btw, by just looking through some forums, I saw the following
> Anyone got experience with those?
> Follow me on twitter: http://twitter.com/moinlabs