Yes, your Intel DF41RQ
supports C2Q CPU's and all
The type of RAM on the GPU has absolutely no bearing on what the motherboard uses, it is a completely separate system.
Also, just so you know, the E7500 is a dual core CPU, not a quad core....
If you want a quad core, get a Q
A further recomendation, do not waste your cash on a 1Gb 4670.
At the resolutions it is capiable of gaming at, anything over 512Mb is overkill.
Get the 512Mb version, save some cash and enjoy the same performance.