I'm seeking input from the hardware buffs here regarding the T3400 versus the T5400 as a replacement for my primary trading box which has served me flawlessly for 7+ years. Recently my CPU has hit 100% usage a few times during the trading day, slowing things down noticeably. Price is no object but I would like to make an efficient purchase. I've read the threads recommending the T3400 and was ready to purchase it but the Dell sales rep made me think about moving up to one of the higher Precision lines, the T5400 with the Xeon chip. I have no idea what the differences in chips are. I trade only stock index futures with my primary account at IB and a backup account at PFG; I usually have both TWS and Best Direct execution platforms running. I use Ensign for about 10 charts with datafeed from IB and e-signal as backup; only one feed is running at one time. I also run Outlook Express and have a couple of Internet Explorers open during the day. My current trading box is a Pentium III (not positive though) using Windows 2000, 1 GB RAM, and I have 4 monitors hooked up using the Appian Jeronimo Pro quad video card. The monitors are Samsung SyncMaster1200NF's (CRTs) which I do not want to replace. I'm not sure if I can use my current quad video card in a newer computer. I have in mind getting the NVIDIA Quadro NVS 440 from another vendor but need to know if I can hook up my CRTs to this card. I have some questions: Do I get anything out of upgrading to a T5400 in terms of the Xeon chip? Can I run my CRT's on 2 NVS 290 cards (Dell's quad configuration for the T5400)? How much RAM is optimal for Windows XP? Thanks for any help.