| ||Thread Tools|
|30th July 2008, 16:35||#1|
Join Date: May 2002
PCMark05 Favors Intel CPUs ?
I've heard rumors for years that performance in PCMark 2005 could change depending on what CPUID was handed to the benchmark, but this is the first opportunity I've ever had to test that theory. The term CPUID refers to a processor-specific character string that stores information on the chip's manufacturer, available features, make, and model. Different manufacturers use different CPUIDs, including GenuineIntel, AuthenticAMD, CentaurHauls, and the now-obsolete CyrixInstead. Intel and AMD both lock their CPUIDs to prevent them being changed by a third party, but VIA doesn't—and that gives us an opportunity to explore a question that normally can't be explored.
My my. Swap CentaurHauls for AuthenticAMD, and Nano's performance magically jumps about 10 percent. Swap for GenuineIntel, and memory performance goes up no less than 47.4 percent. This is not a test error or random occurance; I benchmarked each CPUID multiple times across multiple reboots on completely clean Windows XP installations. The gains themselves are not confined to a small group of tests within the memory subsystem evaluation, but stretch across the entire series of read/write tests.
Last edited by jmke : 30th July 2008 at 16:37.
|30th July 2008, 18:08||#3|
Join Date: Nov 2004
Interesting ... I really hope that other people pick up on this and re-run the tests as well :-).
|1st August 2008, 15:19||#4|
Join Date: May 2002
Slashdot posted this too here: http://hardware.slashdot.org/article.../08/01/1152237
with some interesting comments:
|1st August 2008, 23:02||#5|
Join Date: Mar 2006
No matter what the cause, it means any benchmark that's not on an Intel system is flawed and any cross-platform comparisons are flawed.
Pretty pointless using the software unless all you want to do is to note incremental changes in a specific system after any upgrades?
|Thread||Thread Starter||Forum||Replies||Last Post|
|Intel Talks "Canoe Lake" Platform and "Oak Trail" CPUs||jmke||WebNews||0||1st June 2010 15:08|
|88 percent of Intel CPUs in Q1 2011 to be Core 2010||jmke||WebNews||2||12th May 2010 22:41|
|Intel Plans Core i7 and Core i5 CPUs for Notebooks in 2010||jmke||WebNews||0||13th November 2009 13:00|
|Early sales of Core i5 and i7 CPUs unlikely to stop despite Intel warning||jmke||WebNews||1||21st August 2009 23:21|
|Intel Has Shipped 1 Million Nehalems CPUs||jmke||WebNews||2||17th April 2009 20:36|
|QPI Unlocked on recent Intel Core i7 920 and 940 CPUs||jmke||WebNews||4||7th March 2009 08:37|
|Intel Core i7 makes up for 1% of consumer CPUs||jmke||WebNews||0||10th February 2009 19:56|
|Noctua presents NH-U12P SE1366 for Intel Core i7 CPUs||jmke||WebNews||0||12th November 2008 20:46|
|Intel Nehalem to be released as Core i7 CPUs||jmke||WebNews||0||8th August 2008 15:42|
|Intel delivers 64-bit CPUs to server OEMs, delays shipments for the desktop||jmke||WebNews||0||12th August 2004 22:37|