8740w w/ Core I7 620m running slower than core i5 desktop

8740w w/ Core I7 620m running slower than core i5 desktop

I do alot of video editing for my work. The idea behind this laptop was to do video editing on the go. The video I am editing is 720P and higher.

My fps on my destop is in between 150-160fps, the laptop is running at about 60-70fps.

My assumption is that while this is a mobile based processor it shouldnt be that much different.

Thoughts?
I have the latest drivers, and using the Default HP Win7 Image.

 

Mobile i5/i7s are weaker than their desktop brethren so there are no miracles to be expected. If you want a better performing mobile CPU - 840QM/920XM/940XM. Those should be closer to your desktop i5.

My advice - return the laptop and re-order a new one with 840QM, since you can't upgrade now - there are two different motherboard versions, one for dual cores and one for quad cores.

 

Well, every desktop i5 processor is either clocked higher than the i7-620M (3.2-3.6 GHz vs 2.67 GHz), or is quad-core compared to the i7-620M's dual core. Either of these factors would make the desktop edit faster than the notebook, regardless of the difference between mobile and desktop (although, naturally, the reason the i5s have these advantages is the extra power available through the desktop). Without knowing which i5 you actually have, it's difficult to tell if there even is a core i mobile which would outmatch your desktop.

 

Core i5 750 @ 2.67Ghz

Which should be comparable seeing how the i7 has turbo boost and HT. Might be small gains but should be relatively close.

 

^^ Sorry, but no.
Your 750 is 2.67-3.2ghz (on all cores) while 620M is 2.6 on 2 cores and up to 3.3 turbo on a single core. The difference is enormous in CPU critical applications.
Look here for some numbers. Your desktop CPU is stronger than any mobile one including 940XM

 

See, that's the thing. Core i5 desktop processors also have turbo boost, although not hyper-threading. The i5-750 is listed as 1/1/4/4 turbo boost, so it could run at 2.8 GHz on 4 and 3 cores, and 3.2 GHz on 2 and 1 core(s).

An i7-620M, while clocked similarly (3.07 GHz on 2 cores, and 3.33 on 1 core) only has 2 physical cores, so even though it has hyper-threading to let it run 4 threads simultaneously, if doing something like editing that taxes the processor to the fullest, each thread won't receive the full benefit of a core, and so would run at an effectively lower speed.

The highest mobile quad core (i7-940XM) is listed at 2.13 GHz base, with 2/2/8/9 turbo boost, and so could be running at 2.4 GHz on 4 and 3 cores, 3.2 GHz on 2 cores, and 3.33 GHz on 1 core. These similar speeds, along with hyper-threading, means that the i7-940XM would probably come close, and might even be slightly better than the i5-750, but note that we're now reduced to comparing an $1100 processor (ok, $1096 is Intel's release price) to a $200 ($196) processor.

Also note that these are stock numbers, and the desktop i5s are known to overclock pretty well.

Oh, and not to totally discount the numbers on the notebookcheck site, but those numbers are based on a single benchmark for each processor, and are kind of evenly split, with the i5-750 taking the 3DMark06 and wPrime, while the i7-940XM is better in SuperPI and Cinebench.

 

840QM might be a good compromise of performance/price ratio.
BTW, it's available with 8740w and costs only 200$ extra over the stock quad core model (i7-720QM)