Intel Core 2 Duo E6300 & E6400: Tremendous Value Through Overclocking
by Anand Lal Shimpi on July 26, 2006 8:17 AM EST- Posted in
- CPUs
Encoding Performance using DivX 6.1, WME9, Quicktime (H.264) & iTunes
Multimedia encoding is typically a very good CPU benchmark, with performance that scales very nearly linearly with faster CPU clock speeds. Video testing was conducted using three popular codecs and applications: Xmpeg 5.03 with DivX 6.1, Windows Media Encoder with WMV9, and QuickTime 7.1 with H.264. The complexity of the encoding process increases as we move from DivX to WMV9, and H.264 encoding is in a league of its own in terms of the amount of CPU time required. Audio encoding performance was also tested using iTunes; MP3 encoding is less time-consuming than video encoding, but it continues to stress CPU performance.
Video encoding was always one of the strong points of the NetBurst architecture, and the results in DivX and WME9 are one of the few instances where the Pentium Extreme Edition 965 can actually outperform all of AMD's dual core offerings. This is in part due to optimizations in the applications, and the advantage doesn't extend over to QuickTime H.264 encoding or MP3 encoding.
Both of the low end Core 2 Duo chips continue to impress, especially the overclocked E6400 which once again manages to surpass the stock X6800 in performance. How can a slower clocked chip outperform the X6800? Video encoding also stresses FSB bandwidth, and the FSB is running faster and providing more bandwidth with the low-end parts due to overclocking. Obviously, neither chip is actually faster than the X6800 if you test that with overclocking thrown in, but for those looking to save money the performance offered is definitely impressive.
DivX performance is very strong with the new Core 2 processors, and it looks like it'll take K8L to restore AMD's competitiveness here. The E6300 performs like a 4600+ while the E6400 performs like a 5000+, but once overclocked there isn't an AMD CPU that can touch either one. Given that most current 90nm X2s top out at around 2.8 - 3.0GHz on air, there's not much hope here for AMD until 65nm.
The situation is pretty much unchanged using Windows Media Encoder 9: the E6300 and E6400 are competitive at stock speeds but once overclocked they are now able to hang with their more expensive 4MB brethren.
Our Quicktime H.264 test is the most stressful out of all the video encoding tests we've got here, but the Core 2 line is quickly changing that as the majority of Core 2 parts complete the test in around 2 minutes. The E6400 is already faster than the FX-62 at stock speeds and overclocking it gives the X6800 a new neighbor at the top of the chart.
The AMD lineup is far more competitive under the iTunes MP3 encoding test; the E6400 is the same speed as the X2 4600+ while the E6300 is just under the performance of the X2 4200+.
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goinginstyle - Wednesday, July 26, 2006 - link
Read the entire post and see what the outcome is before posting this kind of information.
Kiijibari - Wednesday, July 26, 2006 - link
That's the reason why he was using stepping 5 cores, if he would have used stepping 6, no article, no clicks, no advertising money (from Intel(?) ;-) )
I mean an overclocking article itself is nonsense, exspecially if you only have 1 kind of a specific CPU and that one is directly from Intel...
Just wait until the first guys bought E6300s because of anandtech and then stuck around ~2.0/2.2 GHz. Guess who is angry then ...
Sadly but it looks like anandtech does not care too much about that :(
regards
Kiijibari
Gary Key - Saturday, July 29, 2006 - link
The retail chips are overclocking just as well as the ES chips from all indications the past few days. I know my retail E6400 is 150MHz higher than the ES sample. ;-) Here is an example at XS.......
http://www.xtremesystems.org/forums/showthread.php...">E6700 Retail
Anand Lal Shimpi - Wednesday, July 26, 2006 - link
As soon as we can get our hands on something other than B1 stepping CPUs we'll include those results. As far as I know, there's nothing that has been changed in current silicon revisions to severely limit overclocking. I haven't run into the issues myself but I will do my best to follow up once I can get later silicon.Take care,
Anand
mkruer - Wednesday, July 26, 2006 - link
Thanks Anand,I don’t know if this is true any more but I seem to recall that Intel has a small scale FAB just for engineering samples, and I think that they tend to use it both as a test to validate the new FAB process as well as the CPU design. Thus the engineering samples tend to be better then the mass production chips. Remember the 5 GHz Prescott Intel showed off. I don’t think that anyone go a 5 GHz Prescott running from production chips without having to use liquid nitrogen to keep the chip cool.
This is something to keep in mind when benching the ES ability. The real production chip might be totally different from a thermal and OC aspect.
mine - Wednesday, July 26, 2006 - link
its been reported that there is one change in b2 retail stepping .based on 3 6800 retail versions (b2) @ (xs) b1 stepping seem to oc better than the retail versions
so right now it seems to early to prejudge ..
PetNorth - Wednesday, July 26, 2006 - link
Anand, your X2 4200+ $215 is wrong. It's EE version. Normal version is $187http://www.amd.com/us-en/Processors/ProductInforma...">http://www.amd.com/us-en/Processors/Pro...ion/0,,3...
aldamon - Wednesday, July 26, 2006 - link
Get a better mobo AT and you'll see what the E6300 can really do. The $150 Gigabyte DS3 goes well over 400 FSB with the right RAM.goinginstyle - Thursday, July 27, 2006 - link
His motherboard is fine, using stock cooling is what limited the overclocks.rjm55 - Wednesday, July 26, 2006 - link
It's been interesting to watch as AT has paid more and more attention to overclocking. Fortunately for me, the overclocking on good air cooling has been a perfect match for what I'm looking for. I just checked and the monster Tuniq cooler we saw in the Conroe launch sells for just $49. People using it say it is silent because of the huge fan that turns slow inside the core. The point is I can likely go even further with the Tuniq than Anand found here - which was impressive enough.Now that we see the headroom on even the cheapest Conroe CPUs it is hard to understnad why anyone can consider an AM2 for anything but the low-end. Until Am2 drops to 65nm the Conroe OC blows away anything I can do with my AM2 chip.
Thanks for showing us what great overclockers Conroe is turning out to be! The E6600 with 4MB cache for $312 is looking mighty sweet for me. If I remeber you got yours to 4GHz.