I'm putting together a low-budget gaming setup using a hand-me-down OptiPlex 7040 with an i7-6700, 16GB of DDR4 memory, and the original 240W power supply. I have about $100 to spend on a graphics card. Since the case is a tower, I can use a standard full-size card rather than being limited to low-profile models. What GPU would provide the best performance while staying within the system's low power limits?
3 Answers
The i7-6700’s integrated graphics will handle office work, but they are not a realistic choice for modern gaming. I would avoid using a SATA-to-PCIe adapter or trying to run a much more powerful card from the stock supply, since the connectors and power delivery may not be designed for it. A connector-free GTX 1650 is the sensible balance of performance, power use, and compatibility.
If a GTX 1650 is too expensive, consider a used GTX 1050 Ti, GTX 1050, or GTX 750 Ti. They are slower, but the no-extra-power versions are generally easier matches for a 240W OEM power supply. The GTX 1650 is still the better target if you can find one close to your budget.
The safest and strongest practical choice is a used GTX 1650 4GB that does not require a 6-pin power connector. It draws power directly from the PCIe slot, typically stays around 75W, and works fine with the system’s PCIe 3.0 interface. Look for a short, dual-slot model from a reputable seller, although prices may be closer to $120–$140 depending on shipping and condition.
Examples include the Gigabyte GTX 1650 OC 4G and the original MSI GTX 1650 Ventus XS 4G. Check the exact model carefully because some 1650 variants do include an external power connector.
Cards using 55–60W or less provide more safety margin with an older proprietary power supply, so confirm the card’s power requirements before buying.