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Lenovo Thinkpad X220: Which CPU?

post #1 of 9
Thread Starter 
Hey,

So, I am currently looking at the Lenovo Thinkpad X220 notebook and I'm intrigued by its really long battery life and being lightweight. Fortunately, the heat and noise issues are minimal.

However, I am stuck at which CPU to get. These are the options:
i5-2410m 2.3GHz (+$0)
i5-2520m 2.5GHz (+$55)
i5-2540m 2.6GHz (+$105)
i7-2620m 2.7GHz (+$245)

Unfortunately, I am at a budget and will most likely take the i7 out of the options (doubt it's much an improvement since it's still only dual-core).

As for the i5 options, I will be using the laptop for Matlab, Solidworkds, AutoCAD, Adobe CS3 and CS5 Master collection Suites (I understand the CS5 would benefit with a good graphics card, but I don't mind the integrated card to get the X220's portability and IPS screen). With that, is $105 justifiable for the i5-2540m or should I just stick 2410m? I don't know too much about the 2nd gen Sandy Bridge performances, but I hear the i5 can be just as good as some of the older i7's. Opinions??? Thanks!
post #2 of 9
While i don't have any real insight, i say go for the 2540m. I was looking at the x220 and my only concern is the integrated graphics. But that battery life, especially with the external battery is really impressive.
post #3 of 9
if the only difference is clock speed, I would go with the 2520. Although, even if there's a difference in the integrated GPU, there probably won't be much of a difference to pay $50 more for 100 mhz
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post #4 of 9
I would go with i5-2520m
post #5 of 9
Id stay with the stock i5. It has turbo boost and will speed up if necessary. You probably will not notice a difference between it and the rest.
   
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post #6 of 9
I've seen some discussions on this, and the general consensus is that the best dollar-to-performance upgrade is the 2520, and even that isn't major. Spending the $55 may be worth it, if only for piece of mind, but I wouldn't drop $100 for the extra 100mhz (over the 2520) of the 2540.
Edited by Otterclock - 4/23/11 at 9:02am
    
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post #7 of 9
Thread Starter 
Yeah, so I am going to try to talk to Lenovo about changing my invoice. They had a web error (something about not being able to change the Operating System language from Spanish to English) and sent me an invoice with the i5-2410m. I just e-mailed a representative to see if it's possible to change to the i5-2520m.

Looks like most, if not all, of the reviews used the i5-2520m and provided great speed and performance, despite the Passmark score:
see http://www.cpubenchmark.net/cpu_list.php for it shows the Passmark scores:
2410m: 3304
2520m: 1737 (why is it so low???)
2540m: 3561

If not, I'm sure I'll be fine with the 2410m because I wouldn't need much of the extra features (vt-D and other). Thanks guys!
post #8 of 9
Quote:
Originally Posted by collegekid;13242201 
Looks like most, if not all, of the reviews used the i5-2520m and provided great speed and performance, despite the Passmark score:
see http://www.cpubenchmark.net/cpu_list.php for it shows the Passmark scores:
2410m: 3304
2520m: 1737 (why is it so low???)
2540m: 3561

If not, I'm sure I'll be fine with the 2410m because I wouldn't need much of the extra features (vt-D and other). Thanks guys!

Hm that is interesting.. I checked it out on the site and you're right, it's ranked significantly lower.

In the passmark forums, specifically here, the passmark administrator says that the data is only from one computer's test.. and the person may have tested it on battery power instead of plugged in or something, who knows. Can't get an accurate reading from just one person :\.. it's likely somewhere around 3400 or so.
post #9 of 9
I tested a laptop with a 2410M and it scored a 3600 on cpu for Passmark 7 64 bit in Win 7 Pro and overall score of 1226--no dedicated video though. It seems like the score posted for the 2520 has a core disabled. The x220 does look nice but for those CAD and modeling programs you might want to check benchmarks for the HD3000 igp on the cpu. That could be more disappointing than a few mhz on the cpu.
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