also i lose cursor control; quad desktop, windows 7 (re-installed), installed latest video card driver; need new video card ? nvidia geforce 9800 gt now; crysis crashes, older games run ok; thanks any diagnostics to isolate problem ? running at 90 degress farenheit; thanks little black squares/lines come-up on displaly, then go away, screen switches to desktop, blacks out, etc. then returns to game screen; thanks
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