question about upgrading ram

[nawfal]

hi guys

i have currently 2 x 512mb cheap ddr400 unbranded ram

now, i really didnt want to spend any money on ram, until i move to the new platform am3(?), but the thing is i want to play gothic 3, and have just upgrade my processor and graphics card and gothic needs more ram

so i have 2 x 512mb ram

is it better for me to buy one more stick of 1gb, or 2 more 512mb or ram?
__________________
CPU: X2 4400 @ 2.75ghz
Mobo: Asus A8n-e
Memory: Generic 1gb 2x512mb
Graphics: x1900xtx
Drives: 2x Seagate 400gb
Monitor: Dell 2407 wfp
Creative X-Fi xtreme music
Speakers Logitech z5400
PSU Antec 530w

 

[desolationw]

System Requirements for Gothic 3 from JoWood.com

Minimum

* CPU: 2,0 GHz Pentium or 100% compatible
* 1024 MB RAM
* 3D-Graphic card: 128 MB Direct3D (DirectX 9.0c April 2006 compatible graphics driver) Grafikkarte: ATI X1900 Series, ATI X1800 Series, ATI X1600 Series, ATI X850 Series, ATI x800 Series, ATI x700 Series, ATI x600 Series, ATI Radeon 9800 Series, ATI Radeon 9700 Series
* Soundcard: DirectX compatible
* DVD drive required
* Windows 2000/XP


Recommmended

* 3 GHz Intel Pentium 4 or equal
* 1,5 GB System RAM,
* 3D-Graphic card: ATI X1600, NVIDIA Geforce 6800 Series or better


Additional

* Windows XP, Windows 2000 SP4 Rollup 1, Windows XP 64-bit, Windows 2003 Server
* 4.6 GB free disk space

It says it needs a gig minimum which you have, and recommends 1.5gb.

Your choices are either 1x1gb stick or 2x512mb like you said.

Whereas 2x512mb provides dual-channel there is still a taboo over whether or not filling all 4 ram slots slows your computer down as it puts too much stress on the ram controller thingymajig?!?

IF anyone says that this won't happen then i would get 2x512mb's.

also, what is your current cpu and g-card?