Intel's Pentium Extreme Edition 955: 65nm, 4 threads and 376M transistors
by Anand Lal Shimpi on December 30, 2005 11:36 AM EST- Posted in
- CPUs
Final Words
The Pentium Extreme Edition 955 finally starts to bring some respectable performance to Intel's high end processors, but there is no clear cut victory. In applications and usage scenarios where the EE's ability to execute four threads simultaneously comes into play, it generally can remain quite competitive with the Athlon 64 X2 4800+. However, looking at older applications, single threaded scenarios and some multithreaded applications that aren't optimized for more than two threads, the EE 955 falls significantly behind.
There are a few other conclusions that we can draw based on what we've seen thus far. For starters, Hyper Threading is quite important to the performance of the Extreme Edition 955. While it isn't always perfect, when under very heavy multitasking loads, the ability to execute more threads translates into better overall performance for the entire system.
We've also been able to take an early look at the state of multithreaded game development, through the latest Call of Duty 2 and Quake 4 patches. Although the performance in CoD2 was terrible in SMP mode, Quake 4 gave us some hope, with performance gains approaching the 50% mark on dual core processors at CPU bound resolutions.
As far as the processor at hand is concerned, Intel has done a reasonable job with the Pentium EE 955, but with Conroe not too far away, we just can't justify recommending it. If you absolutely must upgrade today, the Athlon 64 X2 is still probably going to be a better bang for your buck. However, as we have seen in the benchmarks, there are advantages to being able to execute four threads simultaneously.
It is pretty much a toss-up at this point, but we'd recommend sticking with AMD for now and re-evaluating Intel's offerings when Conroe arrives. If all goes well, we will have a cooler running, faster processor with Conroe that may provide some even tougher competition for AMD's Athlon 64 X2.
While we're not emphatically recommending Intel's latest and greatest, we are impressed with Intel's transition to 65nm thus far. If Intel can use Cedar Mill and Presler to ramp up their 65nm process, hopefully it will be primed and ready for Conroe's introduction later this year. From what we've seen of Yonah, Intel does have their work cut out for them in order to truly regain the performance crown with Conroe, but anything is possible. A successful migration to 65nm would be a definite step in the right direction for Intel.
More than anything, we're hoping not to be disappointed by Conroe. We vividly remember recommending to wait for the original Pentium 4's release and then once more for Prescott's release, and both times being terribly disappointed by Intel's decisions. Let's hope that with the Pentium M team at the helm, Conroe's introduction will be a change of tradition for Intel.
The Pentium Extreme Edition 955 finally starts to bring some respectable performance to Intel's high end processors, but there is no clear cut victory. In applications and usage scenarios where the EE's ability to execute four threads simultaneously comes into play, it generally can remain quite competitive with the Athlon 64 X2 4800+. However, looking at older applications, single threaded scenarios and some multithreaded applications that aren't optimized for more than two threads, the EE 955 falls significantly behind.
There are a few other conclusions that we can draw based on what we've seen thus far. For starters, Hyper Threading is quite important to the performance of the Extreme Edition 955. While it isn't always perfect, when under very heavy multitasking loads, the ability to execute more threads translates into better overall performance for the entire system.
We've also been able to take an early look at the state of multithreaded game development, through the latest Call of Duty 2 and Quake 4 patches. Although the performance in CoD2 was terrible in SMP mode, Quake 4 gave us some hope, with performance gains approaching the 50% mark on dual core processors at CPU bound resolutions.
As far as the processor at hand is concerned, Intel has done a reasonable job with the Pentium EE 955, but with Conroe not too far away, we just can't justify recommending it. If you absolutely must upgrade today, the Athlon 64 X2 is still probably going to be a better bang for your buck. However, as we have seen in the benchmarks, there are advantages to being able to execute four threads simultaneously.
It is pretty much a toss-up at this point, but we'd recommend sticking with AMD for now and re-evaluating Intel's offerings when Conroe arrives. If all goes well, we will have a cooler running, faster processor with Conroe that may provide some even tougher competition for AMD's Athlon 64 X2.
While we're not emphatically recommending Intel's latest and greatest, we are impressed with Intel's transition to 65nm thus far. If Intel can use Cedar Mill and Presler to ramp up their 65nm process, hopefully it will be primed and ready for Conroe's introduction later this year. From what we've seen of Yonah, Intel does have their work cut out for them in order to truly regain the performance crown with Conroe, but anything is possible. A successful migration to 65nm would be a definite step in the right direction for Intel.
More than anything, we're hoping not to be disappointed by Conroe. We vividly remember recommending to wait for the original Pentium 4's release and then once more for Prescott's release, and both times being terribly disappointed by Intel's decisions. Let's hope that with the Pentium M team at the helm, Conroe's introduction will be a change of tradition for Intel.
84 Comments
View All Comments
Betwon - Saturday, December 31, 2005 - link
NO.Don't You think that Future versions of the patch will be written by intel.
Viditor - Saturday, December 31, 2005 - link
Doubtful (but who knows)...I can't see Intel spending 100s of millions with every developer (or even 1 developer) for the long term, just to keep tweaking their patches. It's just not a very smart long term strategy (and Intel is quite smart).
Betwon - Saturday, December 31, 2005 - link
You just guess it.We find that the good quality codes can provide better performance for both AMD and Intel.
Intel can often benefit more, because the performance potential of Intel is high.
Now, You can not find another SMP-game which can make fps of SMP CPU improve so much great.
If you find it, please tell us.
There is no one who found it.
Viditor - Saturday, December 31, 2005 - link
Now it's you who's guessing...
Betwon - Saturday, December 31, 2005 - link
NO.It is true.
Viditor - Saturday, December 31, 2005 - link
OK...prove it!
Betwon - Saturday, December 31, 2005 - link
For example:we saw a test(from anandtech)
With the good quality codes, AMD become faster than before, but Intel become much faster than before.
They use Intel's compiler.
Betwon - Saturday, December 31, 2005 - link
When not use the intel's compiler, AMD become slow.Viditor - Saturday, December 31, 2005 - link
I know you've often quoted from the spec.org site...
I suggest you revisit there and look at the difference between AMD systems using Intel compilers and the PathScale or Sun compilers. In general, the Spec scores for AMD improve by as much as 30% when not using an Intel compiler...especially in FP.
http://www.swallowtail.org/naughty-intel.html">http://www.swallowtail.org/naughty-intel.html
defter - Saturday, December 31, 2005 - link
This is not true, for example:
FX-57, Intel compiler, SpecInt base 1862:
http://www.spec.org/osg/cpu2000/results/res2005q2/...">http://www.spec.org/osg/cpu2000/results/res2005q2/...
FX-57, Pathscale compiler, 1745: http://www.spec.org/osg/cpu2000/results/res2005q2/...">http://www.spec.org/osg/cpu2000/results/res2005q2/...
Opteron 2.8GHz, Intel compiler, SpecInt base 1837: http://www.spec.org/osg/cpu2000/results/res2005q3/...">http://www.spec.org/osg/cpu2000/results/res2005q3/...
Opteron 2.8GHz, Sun compiler, SpecInt base 1660: http://www.spec.org/osg/cpu2000/results/res2005q4/...">http://www.spec.org/osg/cpu2000/results/res2005q4/...
In SpecFP Intel compiler produces slightly slower results, but the difference isn't 30%:
Opteron 2.8GHz (HP hardware), Intel compiler, SpecFP base 1805: http://www.spec.org/osg/cpu2000/results/res2005q3/...">http://www.spec.org/osg/cpu2000/results/res2005q3/...
Opteron 2.8GHz (HP hardware), Pathscale compiler, SpecFP base 2052: http://www.spec.org/osg/cpu2000/results/res2005q3/...">http://www.spec.org/osg/cpu2000/results/res2005q3/...
Opteron 2.8GHz (Sun hardware), Sun compiler, SpecFP base 2132: http://www.spec.org/osg/cpu2000/results/res2005q4/...">http://www.spec.org/osg/cpu2000/results/res2005q4/...
So let's see:
Intel vs Sun compiler:
- Intel complier is 10.7% faster in SpecINT
- Sun compiler is 18.1% faster in SpecFP
Intel vs Pathscale compiler:
- Intel compiler is 6.7% faster in SpecInt
- Pathscale compiler is 13.7% faster is SpecFP
It is quite suprising that Intel's compiler gives best results for AMD's processors in many situations.