I am here.
I look through all conversation and facts presented - your current card choice has 2 problems:
First, those 2 transistors are in the way of GPU cooler, those 2 transistors can be removed, can they be bent - I have no clue, but would not recommend it.
Second, your Radeon choice has dual bracket - it would not fit into the case, look below for an explanation....
THIS POST APPLICABLE TO MT (MINI TOWER) FORM FACTOR ONLY.
Unfortunately no card that is more than 7.5 inches long or 2 slots wide will PHYSICALLY FIT inside the case - it was found that only single bracket video card can fit due to BTX MOBO, where card internals facing upward towards PC internals, not ATX, where dual card design is blocking another PCI slot by facing downward.
If you prefer the card with beefier fan, then the length of the card must not exceed 7.5 inches, otherwise only "skinny" single bracket, single slot cards can physically fit.
Pictures below will prove my point.
View shows no room for dual bracket
Single bracket only, or you have to cut dual bracket in half
This is the other way to show my point
Here you can clearly see only single place for the bracket
Visual explanation
7.5 inches explained, also shown "obstacles"
This is the picture of actual "skinny" single slot video card (not sure which model)- perfect, "glove" fit.
So, as you can see this card is not a good choice, would you consider something else?
Edit: I just realized what is the most important third reason - your power supply - Radeon X1900 XT – 22-25A and a 520W PSU minimum this is from here http://forum-en.msi.com/faq/article/power-requirements-for-graphics-cards.
Your power supply is about 300 watt, upgrade PSU on your Optiplex is a headache, can be done, but will require improvisation - The best option for you in this situation is to find Sapphire (you like this manufacturer, I do too for this card) HD7750 low profile like this one:
SAPPHIRE 100357LP Radeon HD 7750 1GB 128-bit GDDR5 PCI Express 3.0 x16 HDCP Ready Low Profile Video Card - it is out of stock almost everywhere in the US.
GPU cooler is very skinny and should fit between card and transistors, also, no power supply upgrade is necessary here - this is your best choice, if you can find it!