I've compared two cards one is the EAH4870 512Mb gddr5 and the other is a sapphire 100242TXSR 512Mb gddr3. Their not to far off on specs except about 75Mhz less on the core clock 1.4Ghz on the memory clock(which is a little much) and the fact the 4870 is GDDR5 and the 4850 is GDDR3. the price difference is 100 bucks. my question is, is there something im not seeing in the card differences? and if i'm only running a tiny 15" 1024x768 monitor is it worth it to spend another 100 bucks? (i heard 4870's are just really good/made for high res/big monitors.) thanks the links are ASUS: http://www.newegg.com/Product/Product.aspx?Item=N82E16814121290R Sapphire: http://www.newegg.com/Product/Product.aspx?Item=N82E16814102760R sorry for the multiple posts, but i keep submitting before i know i'm finished on what i'm saying oh and the the title was supposed to be "4870 VS. 4850" sorry about that. my LAST question is other than just buying a new 4870 or 4850 would it be better for me to run another 3870 with the current one i have? i know it would for money but for performace would either a 4870 or 4850 out perform two 3870's? (i've compared the specs and they say "yes" it would outperform it but i still think theres something i haven't taken into consideration.) thanks again.