Hi,
I would mostly appreciate your suggestions regarding the bottleneck of overclocked QSV.
I have Core i5-2400s on Intel's DH67BL (H67) mother and have been using Media Espresso 6.5 to transcode ts files (MPEG-2) into H.264 by QSV. DH67BL allows me to overclock the graphics core from its default 1.1GHz to 2GHz. I observe linear shortening of transcoding time from 43 seconds/GB (1.1GHz) to 35 seconds/GB (1.6GHz), but beyond that there is no further improvement. Thus, it is expected to be transcoding in 30 seconds/GB at 2GHz but in reality it takes 35 seconds/GB.
QSV encoding in Media Espresso 6.5 is already ultrafast, and first I thought it might be hitting the I/O bandwidth of HDD, but it was not the case because SSD or even RAMDISK did not improve the situation.
Any idea about what is becoming the bottleneck of overclocked QSV? My guess is that it has something to do with either Sandy Bridge's internal hardware (such as data transfer) or Media Espresso's logic or both.
I have posted the same question in AnandTech review of i7-2820QM before knowing this forum.
Thanks for your comments.
I would mostly appreciate your suggestions regarding the bottleneck of overclocked QSV.
I have Core i5-2400s on Intel's DH67BL (H67) mother and have been using Media Espresso 6.5 to transcode ts files (MPEG-2) into H.264 by QSV. DH67BL allows me to overclock the graphics core from its default 1.1GHz to 2GHz. I observe linear shortening of transcoding time from 43 seconds/GB (1.1GHz) to 35 seconds/GB (1.6GHz), but beyond that there is no further improvement. Thus, it is expected to be transcoding in 30 seconds/GB at 2GHz but in reality it takes 35 seconds/GB.
QSV encoding in Media Espresso 6.5 is already ultrafast, and first I thought it might be hitting the I/O bandwidth of HDD, but it was not the case because SSD or even RAMDISK did not improve the situation.
Any idea about what is becoming the bottleneck of overclocked QSV? My guess is that it has something to do with either Sandy Bridge's internal hardware (such as data transfer) or Media Espresso's logic or both.
I have posted the same question in AnandTech review of i7-2820QM before knowing this forum.
Thanks for your comments.
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