Posts by RWZeitgeist

1) Message boards : Number crunching : 18,000 S@h-RAC - which GPU? (Message 1319877)
Posted 25 Dec 2012 by Profile RWZeitgeist
My 6 core AMD computer with a Gigabyte GTX 670 ( currently shows a RAC of nearly 27,000. Neither the processor nor the video card are overclocked. The 2GB GTX card runs three simultaneous SETI tasks. While the 6 AMD cores do run SETI tasks, the video card dominates the RAC score.
2) Message boards : Number crunching : 2012 - 2013 Marathon Pledge Drive (Message 1274551)
Posted 23 Aug 2012 by Profile RWZeitgeist
Your gift was assigned to the following areas:

SETI@home - $250.00

Your confirmation number is: 97060


3) Message boards : Number crunching : AMD test needed to improve TThrottle AMD support. (Message 1263529)
Posted 23 Jul 2012 by Profile RWZeitgeist

Copy everything and email it to me.

1) Copy from CPU-Z
2) A copy from the Logging tab with "Debug" checked.
3) A copy from the PCI Scan list. (leave out the # and at is @)

4) Message boards : Number crunching : Windows Licensing, virtual machines. (Message 1262087)
Posted 19 Jul 2012 by Profile RWZeitgeist
I copied this paragraph directly from the Microsoft license of my Windows 7 machine. The installed system is an OEM package legally purchased with hardware.
a. One Copy per Computer. The software license is permanently assigned to the computer with which the software is distributed. That computer is the “licensed computer.”
d. Use with Virtualization Technologies. Instead of using the software directly on the licensed computer, you may install and use the software within only one virtual (or otherwise emulated) hardware system on the licensed computer. When used in a virtualized environment, content protected by digital rights management technology, BitLocker or any full volume disk drive encryption technology may not be as secure as protected content not in a virtualized environment. You should comply with all domestic and international laws that apply to such protected content.

I have another machine that came with Windows 7 installed. I removed Windows 7, installed Fedora 15 on the bare metal, then installed Windows 7 in a VirtualBox VM. This configuration has been running for well over a year without issues of any sort. Windows update runs as expected. The license verifications occasionally delivered in Windows Update have never reported a problem. I honestly don't remember having to call to activate the reinstalled Windows 7.
5) Message boards : Number crunching : May/June Fund Drive (Message 1111056)
Posted 29 May 2011 by Profile RWZeitgeist
Thank you for your gift of $250.00 via Visa on 05/29/2011.
Your gift was assigned to the following areas:

SETI@home - $250.00

Your confirmation number is:
6) Message boards : Number crunching : Quad Core vs. Hex Core (Message 1076885)
Posted 13 Feb 2011 by Profile RWZeitgeist
I am looking at an upgrade to my PC's processor and currently I'm debating between a Phenom II X4 or X6. I'm not sure which would be better, so I could use some suggestions.

All other things being equal (clock rate, cache, ...), 6 cores will crunch more. I've been quite happy with my X6.

As an aside on the upgrade, my current processor is rated for 80W TDP. Can I go to the 125W TDP processors in the X4 or X6 families without much difficulty, or should I scale back the ambition of the upgrade for the sake of a still functional machine?

The answer depends on your motherboard. I upgraded my Gigabyte GA-890XA-UD3 from a Phenom II X4 955 to a Phenom II X6 1055T. However, my motherboard specifically lists support for 125 watt processors, so the upgrade works fine.

Check the CPU support list for your motherboard, or look in the manual, to find out of your board supports the power requirements of your proposed processor.

I notice that the Gigabyte CPU support list for my motherboard lists four Phenom II X6 processors with a TDP of 95W, so an upgrade to a hex core processor doesn't necessarily mean 125W TDP.

7) Message boards : Number crunching : Virtual Machine and CUDA Questions??? (Message 1070778)
Posted 26 Jan 2011 by Profile RWZeitgeist
Q1) Just wondering. Provided you have the right hardware, is it possible to run CUDA from a virtual machine ?

Q2) If you run a 32bit OS can you run a 64bit VM (on 64 bit hardware) and get the full benefit of the 64bit system ?

I tried looking in the VM Ware forums but these questions weren't answered


From the VirtualBox User Manual (see an answer to your second question:

VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met:

1. You need a 64-bit processor with hardware virtualization support (see the section called “Hardware vs. software virtualization”).
2. You must enable hardware virtualization for the particular VM for which you want 64-bit support; software virtualization is not supported for 64-bit VMs.
3. If you want to use 64-bit guest support on a 32-bit host operating system, you must also select a 64-bit operating system for the particular VM. Since supporting 64 bits on 32-bit hosts incurs additional overhead, VirtualBox only enables this support upon explicit request.

Note carefully the comment that this configuration "incurs additional overhead", suggesting the guest operating system won't run as fast as it would if the host operating system was a 64 bit system.

FWIW, I've been using VirtualBox to run Windows 7 Ultimate 64 bit as a guest on a 64 bit Fedora Linux host for many months without issues.

8) Message boards : Number crunching : Emergency fund drive for the project............. (Message 1041326)
Posted 11 Oct 2010 by Profile RWZeitgeist
Somebody updated the SETI donations summary page for October, substantially improving the numbers.

9) Message boards : Number crunching : Emergency fund drive for the project............. (Message 1040824)
Posted 10 Oct 2010 by Profile RWZeitgeist
Should be RWZeitgeist, not RVZeitgeist.

10) Message boards : Number crunching : Emergency fund drive for the project............. (Message 1040089)
Posted 9 Oct 2010 by Profile RWZeitgeist
"Thank you for your gift of $250.00 via Visa on 10/08/2010.
Your gift was assigned to the following areas:

SETI@home - $250.00"

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