My computer internet speed 3mbs slower than my laptops internet speed

[jamesg2571]

my laptop which is a hp probook 4730s has a speed of 4.5mps wireless but my desktop pc which is in the same room has a speed of only 1.2mps. (this is after i upgraded my desktop mobo and cpu)

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im thinking it might be that im using a 4pin mobo power connector (converted to a 8pin plug) on a 8pin power motherboard, will that effect performance in anyway?

my motherboard is a gigabyte ga-ma970xt ud4p
my wifi card in my desktop is a linkysys wireless G PCI adaptor


please help as games like bf3 are lagging as ping over 150 when its usually 47

 

[jamesmcuk]

turn off all AV and firewalls and see if problem persists