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Dual Opteron Quad Core 2356 vs Dual Xeon E5405 vs Intel Core i7 920

View Poll Results: Reliable?
Dual Opteron Quad Core 2356 6 26.09%
Dual Xeon E5405 7 30.43%
Intel Core i7 920 8 34.78%
Intel Core i7 860 4 17.39%
Multiple Choice Poll. Voters: 23. You may not vote on this poll

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  #1  
Old 09-18-2009, 04:39 PM
Up2vps Up2vps is offline
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Dual Opteron Quad Core 2356 vs Dual Xeon E5405 vs Intel Core i7 920


poll:
what You prefer? Reliable and high powerfull

Dual Opteron Quad Core 2356 2.3hz
Dual Xeon E5405 2.0hz
Intel Core i7 920 2.66ghz
Intel Core i7 860 2.8ghz



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  #2  
Old 09-18-2009, 05:03 PM
DMEHosting DMEHosting is offline
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Core i7's have been amazing when it comes to virtualization.

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  #3  
Old 09-18-2009, 05:04 PM
MattS MattS is offline
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Core i7 920 I'd have to say would be one of my picks, although the Dual Quad Opteron is pretty tempting. I'd say it all comes down to what you're gonna do, if its Virtualization the Core i7 might do a better job than the Dual opterons.

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  #4  
Old 09-18-2009, 05:20 PM
yajur yajur is offline
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i will go with Dual Xeon E5405 it will be good

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  #5  
Old 09-18-2009, 05:30 PM
KarlZimmer KarlZimmer is offline
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For most server uses the i7 options would be the least powerful, as you'd only have four processing cores, while you have 8 with the dual CPU options. Out of the dual CPU options the AMD should give you better performance as they're clock-for-clock roughly the same as the Intel's, but that one has a higher clock speed.

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  #6  
Old 09-18-2009, 05:35 PM
Up2vps Up2vps is offline
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Quote:
Originally Posted by KarlZimmer View Post
For most server uses the i7 options would be the least powerful, as you'd only have four processing cores, while you have 8 with the dual CPU options. Out of the dual CPU options the AMD should give you better performance as they're clock-for-clock roughly the same as the Intel's, but that one has a higher clock speed.
yes but i7 show 8 CPU

  #7  
Old 09-18-2009, 05:38 PM
KarlZimmer KarlZimmer is offline
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Quote:
Originally Posted by Up2vps View Post
yes but i7 show 8 CPU
Yes, with Hyperthreading you see 8, it physically has 4 cores. The physical cores is what will get you actual processing power.

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  #8  
Old 09-18-2009, 06:26 PM
hhw hhw is offline
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Quote:
Originally Posted by KarlZimmer View Post
Yes, with Hyperthreading you see 8, it physically has 4 cores. The physical cores is what will get you actual processing power.
At the CPU level, hyperthreading allows two threads running concurrently on the same core at different stages in the pipeline to be presented as two separate processor units to the OS. However, without hyperthreading, you are able to run multiple instructions on the same core at different stages of the pipeline anyway for any x86 cpu since 486. As not all instructions can be pipelined in this manner, hyperthreading will allow for better utilization of each core but nowhere near double.

With both hyperthreading and architectural improvements, one nehalem core averages around 25% more performance clock per clock in comparison to Core 2 in benchmarks. Real-world performance would depend on your application, but just using benchmarks to formulate a rough estimate using the clockspeeds of the listed CPU's, you would get more processing power out of the dual CPU configurations.

i.e. some very rough calculations
Dual Opteron Quad Core 2356 2.3hz - 8 x 2.3GHz = 18.4GHz
Dual Xeon E5405 2.0hz - 8 x 2.0GHz = 16.0GHz
Intel Core i7 920 2.66ghz - 1.25 x 4 x 2.66GHz = 13.3GHz
Intel Core i7 860 2.8ghz - 1.25 x 4 x 2.8GHz = 14.0GHz

So as Karl said, the Dual Opteron Quad Core 2356 configuration would be expected to have the best performance for most applications.

Now, if your application sees 31% or more performance increase with Nehalem, you would see better performance with the new single CPU configurations. (8/5 / 2.8/2.3 = 1.31)

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Last edited by hhw; 09-18-2009 at 06:32 PM.
  #9  
Old 09-18-2009, 06:35 PM
tshen83 tshen83 is offline
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Quote:
Originally Posted by hhw View Post
At the CPU level, hyperthreading allows two threads running concurrently on the same core at different stages in the pipeline to be presented as two separate processor units to the OS. However, without hyperthreading, you are able to run multiple instructions on the same core at different stages of the pipeline anyway for any x86 cpu since 486. As not all instructions can be pipelined in this manner, hyperthreading will allow for better utilization of each core but nowhere near double.

With both hyperthreading and architectural improvements, one nehalem core averages around 25% more performance clock per clock in comparison to Core 2 in benchmarks. Real-world performance would depend on your application, but just using benchmarks to formulate a rough estimate using the clockspeeds of the listed CPU's, you would get more processing power out of the dual CPU configurations.

i.e. some very rough calculations
Dual Opteron Quad Core 2356 2.3hz - 8 x 2.3GHz = 18.4GHz
Dual Xeon E5405 2.0hz - 8 x 2.0GHz = 16.0GHz
Intel Core i7 920 2.66ghz - 1.25 x 4 x 2.66GHz = 13.3GHz
Intel Core i7 860 2.8ghz - 1.25 x 4 x 2.8GHz = 14.0GHz

So as Karl said, the Dual Opteron Quad Core 2356 configuration would be expected to have the best performance.
Actually the i7 920 would beat the dual Quad 2356 barcelonas by roughly 20% or so. The only reason you should get the Dual quad Opterons is if you need more than 12GB of ram that the i7 920 will give you.

  #10  
Old 09-18-2009, 06:51 PM
Up2vps Up2vps is offline
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i already Have Dual Quad Opteron with 32gb Ram I plan to get new another server and I want the option,

  #11  
Old 09-18-2009, 06:56 PM
tshen83 tshen83 is offline
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Quote:
Originally Posted by Up2vps View Post
i already Have Dual Quad Opteron with 32gb Ram I plan to get new another server and I want the option,
i7 920 performance:

http://www.spec.org/cpu2006/results/...81024-05720.ps

Dual 2356 Opteron performance

http://www.spec.org/cpu2006/results/...0623-04654.pdf

So i7 gets 109/102 SpecInt vs Opteron 102/87. 7-15% difference.

If you need 32GB ram, get Dual E5504s which gives you up to 72GB ram. Benchs around 137 SpecInt.

  #12  
Old 09-18-2009, 07:27 PM
hhw hhw is offline
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Quote:
Originally Posted by tshen83 View Post
i7 920 performance:

http://www.spec.org/cpu2006/results/...81024-05720.ps

Dual 2356 Opteron performance

http://www.spec.org/cpu2006/results/...0623-04654.pdf

So i7 gets 109/102 SpecInt vs Opteron 102/87. 7-15% difference.

If you need 32GB ram, get Dual E5504s which gives you up to 72GB ram. Benchs around 137 SpecInt.
SPECint's CINT2006 and benchmarks are more oriented towards scientific computing, which is a much different application than your typical hosting environment. Unfortunately, there aren't any SPECweb results for these CPU's yet.

That's not to say the benchmarks I looked at to derive my very arbitrary 25% were the best reference either (Anandtech if anybody cares), but are somewhat more balanced workloads than raw integer and floating point performance.

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  #13  
Old 09-18-2009, 07:39 PM
tshen83 tshen83 is offline
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SpecWeb is heavily IO dependent, and favors max memory configs. So dual Socket systems with obscene 8GB DIMM ram win all the time.

SpecPower2008 is the newest benchmark people look at, which is aggregate performance per watt at different load levels. So I base my decisions on SpecPower2008 ratings per dollar now.

  #14  
Old 09-19-2009, 03:42 AM
Lightwave Lightwave is offline
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As a server builder... I'm inclined to say the Dual Opteron boxes...
However, they real ly would be much better as Shanghai not Barcelona cores.

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  #15  
Old 09-19-2009, 08:20 AM
underduck underduck is offline
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I used both i7 920(HT) and dual e5502(**2.2G), I7 920 with HT tech is obvious faster. about Dual Opteron Quad Core 2356 2.3hz i haven't used amd, however, i don't think it has better performance than top2

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