Best GPUs for this CPU, bottleneck check, and compatible graphics cards
Core 2 Extreme QX9775 / Intel made / Core 2 / Released 2008 Also known as: 9775 / Core2ExtremeQX9775
Core 2 Extreme QX9775 (Intel, released in 2008, also listed as 9775 / Core2ExtremeQX9775) is a CPU with a performance score of 3,800, 4C / 4T, TDP 150W. If GPU compatibility and performance balance are poor, a Bottleneck occurs, preventing the GPU or CPU from reaching its full potential. In our estimate, the GPU that pairs best with Core 2 Extreme QX9775 is GeForce GTX 950 (estimated bottleneck: about 0%). Below are the top 10 compatible GPUs and a guide to GPUs to avoid.
GPUs are ordered by proximity to the ideal CPU:GPU ratio of 0.9:1. A lower bottleneck percentage means the combination can use more of its performance.
If you want higher graphics settings or plan to keep the PC for years, you can pick a GPU one step stronger. Core 2 Extreme QX9775 will fall slightly behind (a bottleneck of 10% or less), but a later CPU upgrade will let the GPU run at full strength.
The Bottleneck Checker opens with Core 2 Extreme QX9775 already selected.
Core 2 Extreme QX9775 (9775 / Core2ExtremeQX9775) has a performance score of 3,800 points. Using the same CPU:GPU ≈ 0.9:1 standard as the checker, compatibility by GPU score is shown below.
| GPU Score to Pair | Rating | What It Means |
|---|---|---|
| Below 2,815 points | GPU Too Weak | The GPU is too weak for this CPU. Some of Core 2 Extreme QX9775 performance remains unused (e.g., GeForce GTX 650 Ti、Radeon HD 6850、GeForce GTX 460) |
| 2,815–4,691 points | Great Match: 10% or Less | Optimal balance. Both CPU and GPU can deliver nearly full performance (ideal: about 4,222 pts) |
| 4,691–5,630 points | Acceptable: 10–25% | The GPU is somewhat strong. This is practical, but the CPU may hold it back under heavy load. |
| Over 5,630 points | CPU Bottleneck: Over 25% | The GPU is too powerful for Core 2 Extreme QX9775 to use fully (e.g., Radeon RX 6500 XT、Radeon R9 290、Radeon RX 470、GeForce GTX 780) |
Note: Perceived results vary by resolution and game (GPU matters more at 4K, while CPU matters more at high-fps Full HD). For an exact estimate, use the Bottleneck Checker.
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These CPUs have similar performance scores and may be useful replacement or comparison candidates.
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Our estimate finds that GeForce GTX 950 offers the best balance, with an estimated bottleneck of about 0%. A CPU-to-GPU performance ratio near 0.9:1 tends to use both parts effectively. See the top 10 compatible GPUs in the table on this page.
Pairing Core 2 Extreme QX9775 with a powerful GPU scoring over 5,630 points (for example, Radeon RX 6500 XT、Radeon R9 290、Radeon RX 470、GeForce GTX 780) is likely to create a CPU bottleneck above 25%.Conversely, a GPU below 2,815 points（例: GeForce GTX 650 Ti、Radeon HD 6850、GeForce GTX 460） leaves some of Core 2 Extreme QX9775 performance unused.
Core 2 Extreme QX9775 has 4 cores and 4 threads.Its base clock is 3.2GHz and maximum boost clock is 3.2GHz.The socket is LGA775.
Core 2 Extreme QX9775 has a TDP of 150W. As a guideline, choose a power supply that covers the CPU TDP plus GPU power draw, with additional headroom.
Its performance score is 3,800 points. CPU–GPU balance matters for games, while core count (4C / 4T) matters for video editing and AI preprocessing. Check the top 10 GPUs above for your use case. GPU VRAM is the main factor for running generative AI, so also see each GPU detail page.
