ULV Laptops any good?

[archi]

I am in the market for a new laptop and been using my Core i5 560M based laptop for over 4 years now. My primary usage is for playing browser based flash games and they are normally quite cpu intensive with CPU running 100% most of the time.

I see most of the new laptops are running the ULV chip and wanted to know if an i5 4300U would be slower in cpu performance compared to i5 560M?

Any thoughts?

 

[RU482]

an i5 4300U would best an i5 560M in all categories by a good margin.

 

[archi]

any idea if turbo in 4300U lasts all time or chickens out in few mins?

Also from future proofing is ULV a good decision? I would prefer to keep the laptop for 4-5 years atleast.
My other option is the i7 - 4600M but its in much bulkier package.

 

[RU482]

any idea if turbo in 4300U lasts all time or chickens out in few mins?

Also from future proofing is ULV a good decision? I would prefer to keep the laptop for 4-5 years atleast.
My other option is the i7 - 4600M but its in much bulkier package.

My experience with Haswell is limited, but I did extensive testing with the previous gen Ivy Bridge i5 3427U (roughly equivalent to i5 4300U). Monitoring the clock frequency in task manager, it'll run at turbo speed all day under load. Not quite sure how they are accomplishing this, but it's what I've seen on Both Ivy Bridge and Bay Trail systems

going "ULV" vs "M" really depends on priority. Due you value long battery life and light weight over greater performance in a bulky hotter running package?

 

[archi]

If it can indeed turbo all time then wouldn't the performance of 4300U be similar or better than say i3 4000M?

What I would like to understand is if the performance per mhz of an ulv chip is same to a standard volt M series processor? (Assuming other variables like cache, ram speed are same)

 

[pw257008]

i would think it's not going to give ULV level battery performance if it's running turbo all the time...

 

[Piroko]

If it can indeed turbo all time then wouldn't the performance of 4300U be similar or better than say i3 4000M?

What I would like to understand is if the performance per mhz of an ulv chip is same to a standard volt M series processor? (Assuming other variables like cache, ram speed are same)

CPU load yes, they should be pretty close. But on mixed/GPU load the Ivy Bridge M chips are clearly faster. As for Haswell my guess is that they'll behave very similar to IB.

i would think it's not going to give ULV level battery performance if it's running turbo all the time...

The i7 3517u that I have will run max turbo of 3.0 Ghz all day at ~14.5W SOC power consumption according to throttlestop, but it does kill the battery quite fast. Low load will get me around six hours, Cinebench drops that to around 3 hours and demanding games ~2.5 hours.