Good to see that you got the problem worked out.
Looking at the info you shared... never knew that Dell used Fatal1ty gaming boards.
I had a similar Fatal1ty gaming board with SLI running Windows XP over 5 years ago with tons of RED surface mount LEDS everywhere so it came to life with a red glow in the tower, and integrated POST diagnostic Green LED readout. I got rid of this back in early 2009 when it sadly would not take a better than a Pentium 4 socket 775 CPU of which I had the 3GHz HT CPU, and games I played required a better ( true dual-core vs Hyperthreaded single-core ) CPU at the time because they were lagging out as the CPU was pegged at 90 to 100% for physical and virtual HT cores almost constant trying to keep up with Need for Speed Carbon and World of Warcraft. So I bought a cheap Dual-Core AMD CPU/Motherboard bundle which was 3x more powerful than it for $65 and was able to move my 1.5GB of 667Mhz DDR2 RAM and Video Card GeForce 7800GT over for the easiest Motherboard/CPU combo upgrade by using all the other original hardware from the Fatal1ty build which was all compatible with the newer dual-core upgrade. Sadly that Fatal1ty board would not take a Core 2 Duo, otherwise I'd probably be still running it today. I gave my board away to a friend who was hard up for a basic computer, and its still running today 5 years later. Good Motherboard, but sadly limited to Pentium 4 Class socket 775 CPU
But the AMD Dual-Core Motherboard/CPU combo upgrade now made these games play without lag that I had prior. I almost bought a new video card thinking it was video card related, but the CPU showing it pegged stood out that I needed more processing power as well as these games were suggesting Dual-Core CPU's for proper gameplay in the game spec requirements.
Are you gaming with this system with modern games? If so which ones and what type of performance are you getting out of it?
Looks like yours is also the 3Ghz HT P4 same as what I was running. I forgot that it was the P4 630.