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TDP in Laptops

post #1 of 5
Thread Starter 
So I'm going to switch my processor from my current i3-370M to an i7-620M. I already know that everything else works out (Man. Tech, Overall Size, BIOS compatibility, sockets, etc.). My current laptop is a HP dv6-3143us. Some specs:

Intel Core i3-370M
ATI Mobility Radeon HD 5650 + Intel HD

So I was looking through everything that could possibly go wrong in switching it and I decided to download CPU-Z to check my socket specs, etc. I open CPU-Z and at first glance, everything looks compatible. Then I look over to the right and I see that my Max TDP rating is 25W. However, when I searched up my processor on Intel's site, it said that the Max TDP should be 35W. The real problem lies in the fact that the i7-620M has a max TDP of 35W as well.

It might just be some misconception I have about TDP in general but now I'm doubting whether or not I can switch my processor due to that problem. Any light shed here will be welcomed as I have not received any replies on any other forums
post #2 of 5
TDP is thermal design power. Basically its how much heat the CPU is designed to put out when running under full load at stock settings. Of course overclocking will change this but motherboard sockets have no effect on it. Its very easy to find CPUs with different TDPs that fit in the same socket simply because intel knows some people will want a cooler more low-powered chip.
    
CPUMotherboardGraphicsRAM
i7 970 4.15 @ ~1.39v HT ON, Turbo Off EVGA x58 3x SLI 2x EVGA GTX 980 SLI (watercooled), 1x EVGA GTX ... 6 GB 1600 OCZ DDR3 Gold Edition 7-7-7-18 @1475Mhz 
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Samsung 840 SSD 250GB, 2xSamsungF3 1TB (Raid0) 22x Super Multi, 8x Blu-ray Reader Windows 7 Ultimate x64 2x Yamakasi Catleap Q270s (2560x1440) 
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Kingwin 1000w Platinum HAF 932 Black Interior Logitech G500 Logitech Z5500 
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CPUMotherboardGraphicsRAM
i7 970 4.15 @ ~1.39v HT ON, Turbo Off EVGA x58 3x SLI 2x EVGA GTX 980 SLI (watercooled), 1x EVGA GTX ... 6 GB 1600 OCZ DDR3 Gold Edition 7-7-7-18 @1475Mhz 
Hard DriveOptical DriveOSMonitor
Samsung 840 SSD 250GB, 2xSamsungF3 1TB (Raid0) 22x Super Multi, 8x Blu-ray Reader Windows 7 Ultimate x64 2x Yamakasi Catleap Q270s (2560x1440) 
PowerCaseMouseAudio
Kingwin 1000w Platinum HAF 932 Black Interior Logitech G500 Logitech Z5500 
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post #3 of 5
Keep in mind your laptop's cooling system is designed for the stock CPU. You might find that it's no longer sufficient in keeping all of the components cool enough after adding a different CPU (one with more cores + hyperthreading and higher TDP).
    
CPUMotherboardGraphicsRAM
i5-2500K Biostar TP67B+ XFX HD5750 1GB 2x4GB DDR3 Corsair 1600 
Hard DriveOSMonitorPower
60GB OCZ SSD, 2x160GB HDD RAID0, 500GB+500GB+1.5TB Windows 7 Ultimate 64-bit Samsung SyncMaster 930B Antec SmartPower 450w 
Case
Antec 900 
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CPUMotherboardGraphicsRAM
i5-2500K Biostar TP67B+ XFX HD5750 1GB 2x4GB DDR3 Corsair 1600 
Hard DriveOSMonitorPower
60GB OCZ SSD, 2x160GB HDD RAID0, 500GB+500GB+1.5TB Windows 7 Ultimate 64-bit Samsung SyncMaster 930B Antec SmartPower 450w 
Case
Antec 900 
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post #4 of 5
Thread Starter 
Thanks, does this mean I have to replace my heatsink or fan? When I searched it up, some sites said that stock cooling should be enough given I don't work it too hard. So the new processor will work then right?

As a bonus question, will undervolting it make it run at cooler temps and allow me to not have to get better cooling? If I have to get cooling anyway, where do I get it?

Sorry for the multitude of questions, this is the first site that has given me reasonable answers that actually help me.

Cheers!
post #5 of 5
Yep, undervolting/underclocking = less heat.
    
CPUMotherboardGraphicsRAM
i7 970 4.15 @ ~1.39v HT ON, Turbo Off EVGA x58 3x SLI 2x EVGA GTX 980 SLI (watercooled), 1x EVGA GTX ... 6 GB 1600 OCZ DDR3 Gold Edition 7-7-7-18 @1475Mhz 
Hard DriveOptical DriveOSMonitor
Samsung 840 SSD 250GB, 2xSamsungF3 1TB (Raid0) 22x Super Multi, 8x Blu-ray Reader Windows 7 Ultimate x64 2x Yamakasi Catleap Q270s (2560x1440) 
PowerCaseMouseAudio
Kingwin 1000w Platinum HAF 932 Black Interior Logitech G500 Logitech Z5500 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 970 4.15 @ ~1.39v HT ON, Turbo Off EVGA x58 3x SLI 2x EVGA GTX 980 SLI (watercooled), 1x EVGA GTX ... 6 GB 1600 OCZ DDR3 Gold Edition 7-7-7-18 @1475Mhz 
Hard DriveOptical DriveOSMonitor
Samsung 840 SSD 250GB, 2xSamsungF3 1TB (Raid0) 22x Super Multi, 8x Blu-ray Reader Windows 7 Ultimate x64 2x Yamakasi Catleap Q270s (2560x1440) 
PowerCaseMouseAudio
Kingwin 1000w Platinum HAF 932 Black Interior Logitech G500 Logitech Z5500 
  hide details  
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