His 3612qm is actually a pretty good CPU... The OP will not see real improvements unless he goes for a desktop with an i7 or AMD 8 core.
@James,
I recommend checking your system while calculating by also running something that can read your core speed. Something like CPUID would do. There is a chance that your CPU is being clocked down because of heat. If that is the case, you can literally double your speed by cleaning the laptop, getting a cooling pad, etc... My 3610qm throttles down to 1.2GHz because of heat!
If you are looking for a laptop that will calculate faster than what you are getting now, you will pay A LOT!!! You have a high end consumer laptop. You will need something custom built to get better performance. Your best bet at a budget system would be an AMD FX 8320 build with 16GB of RAM (you can get away with 8GB). Here's a quick build for example at $1100 (you can shave off a few hundred $$$ on some components like a weaker GPU, no SSD, etc...) This will be much faster than any laptop at a similar price.
PCPartPicker part list:
http://pcpartpicker.com/p/2Xg8J
Price breakdown by merchant: http://pcpartpicker.com/p/2Xg8J/by_merchant/
Benchmarks: http://pcpartpicker.com/p/2Xg8J/benchmarks/
CPU: AMD FX-8320 3.5GHz 8-Core Processor ($154.99 @ SuperBiiz) -
Note Microcenter has this for $99!!!
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($29.98 @ OutletPC)
Motherboard: Asus M5A99FX PRO R2.0 ATX AM3+ Motherboard ($126.98 @ SuperBiiz)
Memory: G.Skill Ripjaws X Series 16GB (2 x 8GB) DDR3-1866 Memory ($142.99 @ Newegg)
Storage: Samsung 840 Pro Series 128GB 2.5" Solid State Disk ($114.99 @ Best Buy)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: PNY GeForce GTX 650 1GB Video Card ($87.99 @ Microcenter)
Case: NZXT Source 210 (Black) ATX Mid Tower Case ($29.99 @ Microcenter)
Power Supply: Corsair CX 750W 80+ Bronze Certified Semi-Modular ATX Power Supply ($64.99 @ Microcenter)
Optical Drive: Asus DRW-24B1ST/BLK/B/AS DVD/CD Writer ($16.99 @ Newegg)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) ($84.99 @ NCIX US)
Monitor: Dell S2240M 60Hz 21.5" Monitor ($119.99 @ Microcenter)
Keyboard: Microsoft SIDEWINDER X4 Wired Gaming Keyboard ($49.99 @ Newegg)
Mouse: Gigabyte GM-M6880 Wired Laser Mouse ($9.99 @ Newegg)
Total: $1093.84
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-21 02:32 EST-0500)