# \#ultralytics

**URL:** https://forum.opencv.org/tag/ultralytics/401.md

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## [Opencv DNN c++ GPU issue](https://forum.opencv.org/t/opencv-dnn-c-gpu-issue/20834)

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**Author:** [@samblueocean](https://forum.opencv.org/u/samblueocean)\
**Replies:** 1\
**Last updated:** [May 12, 2025, 11:51am UTC](https://forum.opencv.org/t/opencv-dnn-c-gpu-issue/20834 "2025-05-12T11:51:24Z")

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My YOLOv8 model is trained on RTX 4090 using Ultralytics. I exported it to ONNX. And when I use the model using opencv DNN in C++ for inference on any other GPU than 4090 (4060, A6000) I do not have good accuracy. The sa…

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## [Unexpected behavior with ONNX model when read from OpenCV DNN module (Java)](https://forum.opencv.org/t/unexpected-behavior-with-onnx-model-when-read-from-opencv-dnn-module-java/17969)

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**Author:** [@akvn](https://forum.opencv.org/u/akvn)\
**Replies:** 8\
**Last updated:** [September 10, 2024, 4:44am UTC](https://forum.opencv.org/t/unexpected-behavior-with-onnx-model-when-read-from-opencv-dnn-module-java/17969 "2024-09-10T04:44:44Z")

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I have a YOLO model extracted in ONNX format and I am trying to use it for inference in Java. I need to get the bounding box and class prediction information. While the model is being read with no errors, I am getting t…