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- - By tigershark (**) Date 2009-10-26 17:18

I know Rybka disguises the k/ns or counts them differently but I just want to make sure my machine is running oK

I have a laptop Intel Core 2 duo 2.4ghz and using a 32-bit version of Rybka 3 get 47 k/ns.  This seems rather slow compared to some of the k/ns that others mention on here but I think most people on here use a 64 bit Rybka.

Can someone tell me if mine is normal for a 32 bit please?
Parent - By Ivang64 (*) Date 2009-10-26 19:13

Yes it is normal.
Parent - By Dragon Mist (****) Date 2009-10-27 00:00
Quite normal Tiger.
- - By tigershark (**) Date 2009-10-27 09:25
thank you.  I am debating upgrading to Windows 7 (64 bit) at some point

Do any users on here use W7?  If so, do Chessbase 9, Fritz 10 etc work OK on that platform?

I know a lot of people here like Ubuntu etc but my wife uses the computer too and she has some work applications that only run on windows.

Parent - - By Ivang64 (*) Date 2009-10-27 14:24 Edited 2009-10-27 14:30
I am using windows 7 64 bit for sometime now on my desktop computer, the version i used is the release candidate so by now you can purchase the official release since
October 22. As for Chessbase GUI's don't worry they should be compatible, you will also get significant performance boost on rybka using the 64 bit version.
Parent - - By tigershark (**) Date 2009-10-27 16:03
thanks. Stupid question but is Ubuntu 64 bit?  I've read that I can do a dual boot somehow with a USB key in which case I could keep XP for some applications but load Ubuntu on the flash drive?

Not sure how I do the latter yet but if I can, what software for analysing games is available on Ubuntu?
Parent - - By brunjes (**) Date 2009-10-27 16:16
Ubuntu comes in 32 bit and 64 bit. 64-bit is the way to go if your processor supports it and especially if you have 4 GB of RAM or more since only a 64-bit OS can address more than 4 GB of memory.

I use 64-bit Ubuntu to run 64-bit Rybka 3 using microwine (free). Felix has written a nice web page about using Rybka 3 with Ubuntu.

I hear good things about Windows 7 but do not run it myself.

Parent - - By Highendman (****) Date 2009-10-27 16:24
Can I ask you something?

Are you using Rybka on Unix because you've measured and you're sure you get noticeable and repeatable better engine performance from your box this way, or is it because "you can" or need Linux for other stuff?

Afaik, Lukas who has the most advanced h/w, is using Windows across his Cluster (I may be wrong). I assume that he would want to squeeze every possible ounce of performance from his machine(s).
Hence if my assumption that he is using Windows is correct, I must further assume he's decided there's no sufficient performance reason to move to Linux if the machine(s) are dedicated to chess engines.

I've started 6 months ago installing Linux on an i7, but mid way through the process changed my mind :)
Parent - By brunjes (**) Date 2009-10-27 19:21
I use Ubuntu (and Linux in general) because I prefer it to Windows; less problems/hassles with viruses/spyware etc. I don't think there is much difference between Windows and Ubuntu when running Rybka 3. If there is a slight edge for Ubuntu, I'd be surprised it it amounted to more than 1 or 2 ELO. I know others here did some testing with huge page sizes but I don't recall if the difference made was significant. If you search on huge pages in this forum I think you'll find those posts.


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