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Posted by Paul on 08/14/07 15:13
Smarty wrote:
> Intel's offerings in high performance processor / motherboards has 2
> somewhat comparably priced alternatives, the "Clovertown" 5365 which is used
> in 8 core Xeon 3.0 GHz versions in such products as the MacPro, and also the
> "Conroe" 6850 CoreDuo Extreme Quad Core which companies like HP, Dell, and
> others are / will be offering.
>
> I am wondering if there is any reason to prefer one versus the other based
> on PC performance, in particular for rendering in programs like Vegas 7.
>
> Any opinions would be much appreciated. Thanks,
>
> Smarty
>
Platforms that support the processors are different. The 5365 probably
uses an FBDIMM memory based chipset. The 6850 might be compatible with
desktop boards, and then maybe you could use DDR2 or DDR3, depending
on chipset. Do both processors have the same FSB speed ?
Memory bandwidth is limited by either the memory bus operating speed,
or by the FSB operating speed. So one of those platforms is
going to be better that way than the other.
To a first order approximation, the performance is proportional to the
core clock speed. Memory is a secondary effect, and sometimes, going for
better memory, makes no economic sense. But that has not stopped
people from spending hundreds of dollars on the fastest memory they
can find.
http://processorfinder.intel.com/details.aspx?sSpec=SLAFN
Intel® Core™2 Extreme Processor QX6850
3 GHz, FSB1333, 8MB L2. 130W, CPUID 06FB hex, socket LGA775 (desktop)
5365 is not listed, so I have to use 5355 instead. It does
look to be the same processor, only in a different socket.
So the 5365 probably has the same stats, only runs at 3GHz.
It is possible the power spec could be different, and be 130W
like the QX6850.
http://processorfinder.intel.com/details.aspx?sSpec=SLAEG
Intel® Xeon® Processor X5355
2.66 GHz, FSB1333, 8MB L2. 120W, CPUID 06FB hex, socket LGA771 (server)
You can go here, and select "Intel Core2 Processor", then QX6850.
A long list of boards is returned.
http://support.asus.com/cpusupport/cpusupport.aspx?SLanguage=en-us
Commando
P5B
P5B Deluxe
P5B Deluxe/WiFi-AP
P5B Premium
P5B-E
P5B-E Plus
P5K
P5K Deluxe
P5K Premium/WiFi-AP
P5K SE
P5K WS
P5K3 Deluxe
P5K3 Premium/WiFi-AP
P5KC
P5K-E/WiFi-AP
P5KPL-VM
P5K-V
P5NT WS
P5W DH Deluxe
P5W64 WS Professional
P5WDG2 WS Professional
The P5K are the latest, and are native FSB1333 chips. Some boards support
DDR2 and some support DDR3, which means you have choices as to what to get.
So the choice all boils down to which memory type offers the best performance
FBDIMM, DDR2, or DDR3 ?
Paul
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