i7 920XM in Toshiba x505-898??

Woops sorry for the heading I meant i7 940xm. My buddy wants to settle a debt and trade me a i7 940xm mobile processor for the debt. I just got a qosimo x505-989 with an i7 740qm 2 weeks ago.

I know the qosimo is a pain to take apart, but I've upgraded a processor in an older verison. And I'm off the next 2 weeks for the holiday, so I have the time.

1] will the i7 940xm work in the qosimo 505??

2] even if it does work will it run too hot??


Thanks for any replies

Happy Holidays

 

sounds like it would work but its best to ask this in toshiba subforum to be extra sure

 

Whether it is compatible or not, you should first think of "whether you would really need it or not?"

740qm is definitely a good CPU. Are you maxing out the 4 cores frequently? If you are doing non-cpu intensive tasks for most of your time that is clearly a waste of money.


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Scanner,

I would simply sell the XM, and your notebook too and get a new (better?) Sandy Bridge notebook in a few weeks.

Seriously.

The ~13% difference you'll gain (if you gain it in real world apps) is nothing compared to the real (expected/guessed) 20% performance gain of SB plus all the heat and battery/power benefits too. Not to mention the (new) warranty.

Sell the XM now, and when the SB notebook you want is offered, sell your current Toshiba 505 and go for a real upgrade (with no headaches/glitches) and possibly even make some money out of this deal too.

Good luck.

 

ive seen people o/c a 920xm to 2.8ghz on all cores with hyperthreading enabled on a sager laptop. thats a 1ghz increase over 8 threads. depending on what you do, you may or may not make use of that power.
also, its best to find out whether the toshiba has the psu (usually 120watts up) and thermal overhead to take in the 940xm and overclock it.
assuming your laptop can handle it, the 940xm will provide you with lotsa power. if battery life is not important to you ( and you get it working), id say stick to this option.
with regards to a sandy bridge upgrade, i really would not suggest that. the equivalent sb extreme processor is also 55watts and is rated at 2.5/3.5ghz. the 940xm is just 385mhz below this on stock and as i mentioned overclocks very well. you wont be getting any battery savings also from the sb extreme cpu since it is rated at 55watss also, the same as the 940xm.
to me the only sb cpus that are actually worth getting are the 720/820 replacements.

edit : a new sb extreme cpu would probably cost more than 1000usd (for the cpu alone), going by 920/940xm prices when they first came out. laptops with an sb xm cpu will not be cheap.

 

Comparing his 740QM to the 2720QM, even 20% is extremely conservative, since the increase in clock speed alone is about 27%. (Granted 740QM -> 940XM is about 23%.) The gain is probably closer to 35%-50% in applications that stress the CPU.

 

You're forgetting about the on-chip GPU and the fact that TDP isn't the deciding factor in power consumption. You're also ignoring SB's 10-20% clock-for-clock performance increase and the generally improved power efficiency. It would give noticeably better battery life, especially in NVidia Optimus and AMD Dynamic SG systems.

You are right that the 2920XM will be expensive, though. Keeping the 940XM is better if performance is the main concern, assuming that the laptop supports the CPU and can keep it cool enough to allow overclocking.

 

i was interested in sb a while back but was kinda dissapointed when i saw the xm specs (the qm specs are good though).
it does have an igp but i believe there is debate as to whether this will use cpu bandwidth. if it does, then it could be limiting the performance of the cpu when igp is engaged thus hindering cpu performance a bit (cmiiw of course).
also even with a more efficient architecture (thats still pulling 55w tdp mind you), o/cing it could easilly push power requirements to 90watts. even with sb, you coud probably extend your 1hour battery session (on an old 940xm o/c) to 1hour and 10 mins. what im saying is any battery benefits on even an sb will be miniscule on an xm cpu becasue of the power draw.

sorry OT. lets get back on topic

 

I just want to point out that it's the high-powered, 70W+ graphics card that causes battery life to be so low, not the CPU. With the IGP active, that one hour really becomes two (possibly). Also, the CPU isn't largely bandwidth limited, and it's not like the IGP will be active when gaming. And again, you're misunderstanding what TDP is.

 

Id say that would hold true for any system not using an overclocked extreme cpu.