GTK Radiant (1.5) running lagg

[Netter]

now, i dunno if this is the right spot, just correct me if it isn't.

anyhow, since i got a new computer (which is not so new but anyhow), (2.4 ghz processor, geforce 8800 gts, 4 gig ram), which i have installed GTK Radiant, but, whenever i create a command that alters the XYZ plane (graph like area), it runs unusually slow, which it takes round about 5-15 seconds to create a small box, only thing i do not understand, when i do so, i still use round about 10%cpu (i sit round bout 6-8% on desktop doing nothing) and running 46% ram approx, which is nearly the same as when i am idle. but, whenever i do anything else, (for example right click) it works, just anything that alters the camera or the xyz plane (graph like area) it lags, also, whenever i go to desktop, and go back to gtk radiant, i only see toolbar and seperators (in between texture area - camera, and camera/texture - xyz plane (graph like area) plus the borders of the window)

i'm sorry i can't give you more details, since i'm sorta lost myself, plus, i've found no previous posts relevant to this.

any ideas?

[UniqPhoeniX]

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[swamp-cecil]

christmas. Get a better computer.

[Ingar]

which i have installed GTK Radiant

What radiant? Binary packages? Compiled from source? What OS?

Looking at the specifications, radiant should run fine in your box.

[CATAHA]

Look like you have video drivers problem.

UPD: Try NET Radiant! Its same, but not outdated, some bugs fixed, etc. I dunno why mappers still using GTK Radiant when NET Radiant exist. =D