Battle : 720QM vs 820QM vs 920XM

Results at http://www.notebookjournal.de/praxis/intel-core-i7-720qm-820qm-920xm-nkmo-114/1

Cheer =D

 

Google translated version.

 

GREAT article!

 

Still looks like 720QM is the best in terms of performance for the cost (as expected).

 

It looked like alot of the CPU bench markes were all single threaded. The numbers dont quite add up.

Plus how weird that the 920 can only go to 2.26 and that is if you turn off the 4 extra thread... seems pretty weak sauce to me.

I still want to see a real benchmark with the q9000 vs the 720, the q9200 vs the 820 and the qx9300 vs the 920 in similar statted machines (or as close as is possible)

 

No you don't.... I don't know where you got that from. It'll work at 2.26GHz Hyperthreading on or off.

 

I got it from the article that is the topic of this thread (unless i'm greatly misreading the translation)

They OCed the 920 to 2.26-3.73 but couldnt get it to work with hyperthreading on.

 

That was kinda confusing I apologize. 2.26GHz is the 4 core Turbo so I think I got mistaken with it. Turbo Mode on laptops will rely primarily on thermals to activate so Hyperthreading might interfere with overclocks. Now, I'd say that such high single core clocks are pointless though, modern apps use at least 2 threads.

Now look at the power usage comparison in load compared to the T9800, people. The 45W 720QM and 820XM uses only 2 and 4W more than the 35W T9800. Meaning if they can get a video card that is low power enough, it can replace T series Core 2 Duo.

 

We really can't compare that exactly without isolating the rest of the system.

I wish the comparison would have involved the Core 2 quads as well as the 3.06Ghz Core 2 duo, all with as closely matched hardware as possible. I know the article was nominally supposed ot be just about the three notebook nehalems, but the article touches upon and everyone is interested in penryn vs nehalem.

 

Nice info. And the 720QM is not bad at all, for the price, the performance is impressive!

 

Yeah i just bought my wife the M15x with the 720 in it. I'm going to run a few comparisons between it and my x9000 to see how it preforms in day to day tasks. I think its going to impress me.

I think the 820 might be the sweet spot (though a bit over priced) it looks like the 920 is about the only let down with 3 times the cost and only marginally better preformance. Though once these are released more openly there will probably be better ways to overclock it found and it might be a really super processor then

 

IDK, it would be great to get all 8 threads oc'd to 3ghz or something but that defeats the purpose of letting the CPU handle the OC'ing. I read somewhere that overclocking the i7 mobiles is a big no no and would possibly result in damage to the CPU and or mobo.

 

Where did you find this info?

 

From what I have been reading about overclocking extreme edition i7 mobile processors is that Intel has an application that is similar to Nvidia system tools that allows adjustments.
http://www.intel.com/Consumer/Game/extreme-memory.htm

 

I really hope not, because there are quite a few people OCing the i7's in desktops and not having any problems. I know its a different CPU class, but ours will run at a third of the power draw so we should have pretty decent head room i would think.

I'm not wanting a 3gHz quad (though the qx9300 has been shone able to reach that) but 2.26-2.5 range with hyper threading still active would be nice. (i know the CPU can do 2.26 itself when not under heavy load, but the heavy loads are where the OC starts to pay off)

If intel wants to sell the 920's the CPU's had better be able to have a decent Overclock or no one will ever look any further than the 820 because theres no real pay off for spening 1K+ for the 920.
All of the previous generations extreme CPUS have overclocked beautifully so while expensive you were actually getting something for your money.

 

The link you posted is for desktops.

 

I think you're thinking about this wrong. There are 4 cores plus hyperthreading on each core, not "8 threads" you can overclock. To overclock the most on the desktop people disable hyperthreading which is good for a few hundred extra megahertz and disable the "turbo boost" stuff because they have all four cores running as high as they can go already. Hyperthreading has quesitonable usefulness on a quad core in a home or office environment to begin with, so disbling it to acheive greater clock speeds is a no brainer.

 

You need to read the second page of that article. Read it It doesn't always have advantages in performance.

 

Painful english but still a decent read.