1.6GHz/400MHz FSB/2MB Pentium M 725 (2004) vs. 1.3GHz/800MHz FSB/2MB Pentium SU2700 (2009)

Which is better, performance wise? I've always been under the assumption that the higher the clock speed the better the performance, but it looks like it's more complicated than that.

(My current laptop has the 1.6GHz Pentium M 725 while the one I'm interested in has the 1.3GHz Pentium SU2700)

 

I would get SU2700. Clock speed is a reasonable factor to compare if the CPUs are in the same technology. Here you are comparing a current CPU with a 5-yr. old CPU...

 

SU2700 is basically a single-core Penryn. Even at 1.3 it will be faster than Banias Pentium M, which is two (wait, even three) generations old (if we don't count the die-shrinks, +2 if we do). And at the same time it consumes twice less. It's just so obvious)))

 

The processors are about equal performance wise. The SU2700 only brings 64-bit capability and lower power consumption to the table. How much lower power consumption, we can't be sure, but it would definitely be significant.

The pentium m 725 and a processor that is going 8% faster than yours and with 50% more cache are pretty equal to each other, with a slight edge to the newer one in a couple of benchmarks:
http://hwbot.org/hardware/processor/pentium_m_725
http://hwbot.org/hardware/processor/core_2_u3500_1.4ghz

And that should be a Dothan, not a Banias.

 

Shouldn't Dothan have a 533MHz bus then?

EDIT: Pardon, I was wrong. I forgot that Banias was 130nm and had only 1meg cache

 

Thanks for the replies! So the performance isn't really that much better on the SU2700 then?

 

I just looked it up, and there was a similar chip:
http://ark.intel.com/Product.aspx?id=27577&processor=&spec-codes=SL6F7,SL6FA,SL8BH

Yeah, don't buy it for the (lack of) performance increase.

 

hummm, if this is a 400Mhz Dothan, than it can be pin-modded to become a 533MHz 2.13GHz monster)))

 

Careful though; it might melt his ram slots.

 

LOL))) nah, it will just become a normal 27W Pentium M 770

 

So Performance wise.... SU2700 > Pentium M 725?

I was going to make a thread just like this but guess the OP got to me first.

 

btw, i just looked at superpi scores and from the looks of it SU3500 does it in 31sec at 1.4 whilst dothan needs to go as high as 2.4GHz to achieve the same time.

 

lol the Dothan has 144 million transistors and that Penryn has 410 million... maybe effectively 410/2 because only one core is used though

 

The pi calculation benchmarks seem to favor the penryn, but PCMark and wPrime are about the same. I guess I didn't see that. Still, with a lower clock speed and less cache, the difference between the 725 and su2700 would probably not be noticeable.

Yeah, twice the cores and three times the cache probably eats up most of that difference.

 

you have to consider that those benches were on seriously overclocked dothans, while calculations for su3500 are done at its stock clocks

 

I mean for the stock clocked dothans, the PCMark and wPrime benches are pretty much exactly the same as the su3500.

 

crap.. didn't realise that the SU2700 uses the same mold as the cores with 6MB cache.. even my P8600 with 3MB cache..

 

Oops, I meant 1.5 times the cache. For some reason I was thinking it was 3MB per core.