I was given a refurbished Dell OptiPlex 7010 Small Form Factor, but it struggles with even simple games. It has 16GB of RAM, an Intel Core i5-3550 running at 3.3GHz, and appears to be using the processor's integrated graphics with only 32MB of dedicated video memory. I have around $100 to spend and mainly want to play basic games such as Minecraft without severe stuttering. What upgrade would make the biggest difference, and are there any power or size limitations I should know about?
4 Answers
For Minecraft specifically, a low-profile RX 550 can be a good inexpensive option. Installing performance mods such as Sodium can also make a major difference, especially if you use reasonable render-distance and graphics settings. Be careful with unusually cheap cards and confirm that the card is genuinely low-profile and includes the correct short mounting bracket.
Your 16GB of RAM is already enough. The 32MB figure is probably just the amount reserved for the integrated graphics, not a standalone graphics card. A dedicated low-profile GPU will help much more than adding memory. An RX 550 or GT 1030 should be reasonable for basic Minecraft and older games, while a 1050 or 1050 Ti would be stronger if you find one within budget.
The i5-3550 is an older third-generation processor, so there is a limit to how far this computer can be upgraded. An i7-3770 could provide a modest improvement, but it usually is not worth spending much on this platform. If you later replace the system, aim for a newer used computer; for now, put the budget toward a compatible GPU. Also, there was no third-generation i9—third-generation systems topped out at Core i7 models.
The biggest improvement would be a used low-profile graphics card. Look for an RX 550, GT 1030, GTX 1050, or GTX 1050 Ti that specifically fits an SFF case. Make sure it does not require a separate power connector, since these office systems usually have limited power supplies. Check the wattage of your power supply before buying.

That makes sense. I’ll check the power-supply rating and focus on finding a low-profile card that runs entirely from the slot.