Just out of interest : compare peformance of 2 systems

Hi.

My friend has an desktop with an Pentium d 820 2.8ghz

how does it compare to my

mobile core2due T7700 2.4ghz

which is more powerful.

If each had the same amount of memory, just different processors.

I suppose it will be the desktop, but by how much.

thanks

John.

 

Hard comparison here as there is no basis.

It really depends what kind of benchmarks you are running and what they solely rely on ie; RAM speed, CPU processor speed & cache, GPU speed or HDD Speed or a combination of all of these.

To be honest, the desktop will be faster but not by much in all benchmarks despite the technology architecture differences; yours being much newer and his a couple generations older. Reason being is that the mobile chips are designed to conserve energy and that sacrifices performance, on top of that ram speed and buspeeds are slower, so in general they will be slower than the desktop counterparts. But that solely depends on his desktop hardware components and what his peripherals are.

EDIT: Actually, SkeeteRX8 is right. The Pentium D 820 Presler was based on the Prescott, which isn't reall a good multi-threaded processor compared to C2D, so the Mobile C2D will be faster in pretty much all benchmarks except for a few RAM dependent and HDD dependent tests.

 

However, the T7700 is much better at multi-threaded programs, because though the Pentium D is dual-core, it is essentially 2 P4 processors in one, and isn't as balanced or capable..

 

You will need to run some benchmarks such as 3DMark06, Cinebench(Rendering/CPU), SYSMark etc to really get a grasp as to which system is quicker.

 

SiSoft Sandra Has Pentium D/Core 2 T7600 Dhrystone 10929mips/21080mips Whetstone 8967mflops/14669mflops.

I could not disagree more, your T7700 will obliterate his on anything! Any benchmark except ones for slowness.

 

Right, but that's a theoretical bench and really doesn't show real world performance(neither does 3Dmark06 but it's better). Real world would be actually comparing XVID encoding speeds, SpecView Rendering, Specific Game FPS etc, and not Dhrystone/Whetstone numbers which don't mean anything.

 

CPU charts from Tom's Hardware:

http://www23.tomshardware.com/cpu_2007.html

http://www23.tomshardware.com/cpu_mobile.html

Just from picking a few random benchmarks, it seems like the T7700 is usually about 25 to 30 percent faster than the 820.

 

Pentium D 820 - XVID - 2 Minutes Terminator Encode
http://www23.tomshardware.com/cpu_2007.html?modelx=33&model1=899&model2=876&chart=429

Mobile C2D T7700 - XVID - 2 Minutes Terminator Encode
http://www23.tomshardware.com/cpu_mobile.html?model1=1077&model2=1082&chart=530

Powerpack, read it and weep. LOL just kidding!

Like I said, it really depends on what your benching and how your comparing. That bench seems to hate mobile processors..

Agreed, that the T7700 is quicker than the D 820 in nearly all the benches, so I was wrong Wow how technology has changed these last few years...

 

I'd venture to say that you could attribute some the the T7700's lower benchmarks to subsystem bottlenecks; I mean, the Pentium D is running on a P35 board and the T7700 is running on a mobile 965 board. And then you've got slower memory, slower hard drives, not that it should make too much of a difference, but you should consider it.

But then again, for DiVX 6.6.1, the 820 is actually a full forty seconds faster than the T7700...

 

Yours. The Core 2 DUo is much better than the Pentium D. The Pentium D runs on a certain platform, like all CPU's, but the achitecture of it, isnt good at all. Just there, a C2D outruns it. Also, it most likely has less Cashe, which is very important.