JetUsafMech
04-07-2005, 08:28 AM
Very interesting info they sorta stumbled on during the Intel dual core review.....
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2389&p=8
Snippet:
ghosted my non-NCQ drive to the NCQ drive and re-ran the test. Yep, same results as Monday. The difference was NCQ! Johan had been pushing me to use a Raptor in the tests to see how much of an impact disk performance had on them, and the Raptor sped things up a bit, but not nearly as much as using the 7200.7 did. How much of a performance difference? The following numbers use the same configuration from Monday's article, with the only variable being the HDD. I tested on the Athlon 64 FX-55 system:
Seagate Barracuda 7200.7 NCQ - 25.2 minutes
Seagate Barracuda 7200.7 no NCQ - 33.6 minutes
Western Digital Raptor WD740 - 30.9 minutes
The performance impact of NCQ is huge. But once again, just like the first NCQ article, this is the only test that I can get to be impacted by NCQ - the other Multitasking Scenarios remain unchanged. Even though these numbers were run on the AMD system, I managed to get similar results out of the Intel platform. Although, for whatever reason, the Intel benchmarks weren't nearly as consistent as the AMD benchmarks. Given that we're dealing with different drive controllers and vastly different platforms, there may be many explanations for that.
At first, I thought that this multitasking scenario was the only one where NCQ made an impact, but as you'll find out later on in this article, that's not exactly true.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2389&p=8
Snippet:
ghosted my non-NCQ drive to the NCQ drive and re-ran the test. Yep, same results as Monday. The difference was NCQ! Johan had been pushing me to use a Raptor in the tests to see how much of an impact disk performance had on them, and the Raptor sped things up a bit, but not nearly as much as using the 7200.7 did. How much of a performance difference? The following numbers use the same configuration from Monday's article, with the only variable being the HDD. I tested on the Athlon 64 FX-55 system:
Seagate Barracuda 7200.7 NCQ - 25.2 minutes
Seagate Barracuda 7200.7 no NCQ - 33.6 minutes
Western Digital Raptor WD740 - 30.9 minutes
The performance impact of NCQ is huge. But once again, just like the first NCQ article, this is the only test that I can get to be impacted by NCQ - the other Multitasking Scenarios remain unchanged. Even though these numbers were run on the AMD system, I managed to get similar results out of the Intel platform. Although, for whatever reason, the Intel benchmarks weren't nearly as consistent as the AMD benchmarks. Given that we're dealing with different drive controllers and vastly different platforms, there may be many explanations for that.
At first, I thought that this multitasking scenario was the only one where NCQ made an impact, but as you'll find out later on in this article, that's not exactly true.