by Rob Williams on January 30, 2008 in Processors
Intel’s 45nm Dual-Cores have finally arrived, so it’s only fitting that we take one for a spin. Our test subject is the 3.0GHz E8400, offering 6MB cache, SSE4 and more. Overclocking is impressive, with 3.8GHz stable being possible without even raising the voltage! This chip definitely proves itself a winner.
One area where Intel’s 45nm processors excel is with multi-media encoders that utilize the SSE4 instruction set. Beginning with DivX 6.6.0, the set is fully supported and will make a huge difference when using the “Experimental Full Search” algorithm to encode.
When using DivX 6.6.0+, you will notice that the “Experimental Full Search” is left at Disabled by default. This, as we found out, is a good thing since it does indeed take longer overall. If you are a media enthusiast who cares a lot about quality and doesn’t mind the extra wait, then this might be the route to take. The end result may vary depending on certain factors, such as original video codec, original video quality and video length.
For our testing, we are using a 0.99GB high-quality DivX .AVI of Half-Life 2: Episode Two gameplay. The video is just under 4 minutes in length and is in 720p resolution, which equates to a video bit rate of ~45Mbps, not dissimilar to standard 720p movies. We converted the video two different ways.
First, we encoded the video at the same resolution but a lower quality, so as to achieve a far more acceptable file size (~150MB). The second method is encoding of the same video, but to a 480×272 resolution, similar to what some mobile devices use. This last method is not entirely realistic as it’s unlikely the exported video would work on such a device, but the test is to see the benefits of SSE4 in general.
It’s hard to see what benefit SSE4 had here, but the E8400 still easily beat the other Dual-Cores, not surprisingly.
Where video conversion is concerned, one of the applications I’ve grown to enjoy over the years is Nero Recode. Though it’s export options are extremely limited, they offer high image quality and decent file weight. Nero 8 was released a few months ago, but still lacks support for SSE4.
In a meeting with Nero in September, we questioned whether or not we would see SSE4 support in a future update, but we were told that there is no immediate plans to implement it, although the “guys in the lab” are taking a look at it. Nero exhibits confidence that their application is optimized enough as is, and SSE4 is not needed.
For this test, we’ve first ripped our copy of our concert DVD, Killadelphia, by Lamb of God. The original DVD rip weighs in at 7.7GB, but we are using Nero to reconvert it to 4.5GB so that it will fit on a normal-sized DVD to use as a backup. Our “mobile” test consists of converting the main concert footage to the same resolution a Sony PSP uses (480×272) which results in a 700MB file.
The performance continues here, with the E8400 pushing ahead of our other dual-cores. It also far surpasses our Q6600 for our mobile video, thanks to the fact that the encoder will not utilize more than two cores.