Hi there guys, this is my 1st post and I have searched for my problem on the forum and cannot find the same one anywhere. I have a Sapphire AGP ATI Radeon X1600 PRO - best upgrade vs my budget. I've upgraded the card to put a ZALMAN Heatsink and fan on it as well as RAM HEAT SINKS that come with the Zalman set up on the card. The Zalman fan removed the original fan (obviously) but with it the direct connection from the fan to the board as the Zalman fan needed to be connected to the power directly. I think this has removed ATITools Temp sensors, before the Zalman fan the board used to run at 70 Degrees - Over clocked it'd hit up to 94! Now it doesn't read just displays 50 in the task bar sometimes 49 seems to switch about a bit. but never like 60 or anything higher even on running "scan for artifacts" My system is a Intel Celeron CPU 2.80Ghz I also have 2.00BG of RAM And am running XP PRO SP2 - (all latest updates) I removed Catalyst Control Center as it seems to massively slow the PC down. I had it on before but when it was on my system my X1600PRO didn't seem much faster (if at all) than my old over clocked Radeon 9550 (modded to a 9600 and over clocked.) The card my x1600 pro replaced. I am running ATITools 0.26 The reason for this post is that my ATItools keeps resetting to the defaults 499.50mhz core and 400.5omhz on Mem Also if I set up ATITools and run it and then close it with the "x" button does it keep running? Is there anything I can do to make my card run at optimum levels, I ran find max core and find max mem settings and it found them the mem was 427.50mhz and the core maxed out at 670 - but crashed my PC - whenever I run the "Find Max Core" it runs till crashing the card. I've now set the settings to Core 648.0 and 418.5 mem but for some reason the ATI tools keeps resetting them to defaults? Why is this is it too much for the card to handle? I have read some people on other forums running this card with the fan at core speeds of 670mhz and memory at over 500mhz!? Is this possible? Please help me setup my card so it runs optimality and so that it is stable. I play Day of Defeat Source (HL2 MOD) online and want the best set up I can get. Thank you in advance. Olly.