diff --git a/ggml/src/ggml-cuda/fattn-tile.cuh b/ggml/src/ggml-cuda/fattn-tile.cuh
index be4f3281a5b8..0f7efdef01db 100644
--- a/ggml/src/ggml-cuda/fattn-tile.cuh
+++ b/ggml/src/ggml-cuda/fattn-tile.cuh
@@ -68,6 +68,7 @@ static constexpr __host__ __device__ uint32_t ggml_cuda_fattn_tile_get_config_nv
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 16, 256, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 32, 256, 2,  64,  64)
 
+    GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  2,  64, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  4, 128, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  8, 256, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512, 16, 256, 2,  64,  64)
@@ -132,6 +133,7 @@ static constexpr __host__ __device__ uint32_t ggml_cuda_fattn_tile_get_config_nv
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 16, 256, 2,  32, 128)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 32, 256, 2,  32,  64)
 
+    GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  2,  64, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  4, 128, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  8, 256, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512, 16, 256, 2,  32,  64)
@@ -203,6 +205,7 @@ static constexpr __host__ __device__ uint32_t ggml_cuda_fattn_tile_get_config_am
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 16, 256, 2,  32, 128)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 32, 256, 2,  32, 128)
 
+    GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  2,  64, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  4, 128, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  8, 256, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512, 16, 256, 2,  64,  64)
@@ -277,6 +280,7 @@ static constexpr __host__ __device__ uint32_t ggml_cuda_fattn_tile_get_config_am
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 16, 256, 5,  32, 256)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(256, 256, 32, 256, 3,  64, 128)
 
+    GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  2,  64, 2,  32,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  4, 128, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512,  8, 256, 2,  64,  64)
     GGML_CUDA_FATTN_TILE_CONFIG_CASE(512, 512, 16, 256, 4,  64,  64)
@@ -1259,6 +1263,16 @@ static void launch_fattn_tile_switch_ncols2(ggml_backend_cuda_context & ctx, ggm
             launch_fattn_tile_switch_ncols1<DKQ, DV, 1, use_logit_softcap>(ctx, dst);
             return;
         }
+
+        // DV > 256 (e.g. DKQ=DV=512, head_dim=512 models): extend GQA fallback to ncols2=2/1.
+        // Without this, gqa_ratio not divisible by 4 (e.g. ratio=2) reaches GGML_ABORT.
+        if (use_gqa_opt && gqa_ratio % 2 == 0) {
+            launch_fattn_tile_switch_ncols1<DKQ, DV, 2, use_logit_softcap>(ctx, dst);
+            return;
+        }
+
+        launch_fattn_tile_switch_ncols1<DKQ, DV, 1, use_logit_softcap>(ctx, dst);
+        return;
     }
     GGML_ABORT("fatal error");
 }
diff --git a/ggml/src/ggml-hip/CMakeLists.txt b/ggml/src/ggml-hip/CMakeLists.txt
index f40b1d754f5a..7c70f222e4c6 100644
--- a/ggml/src/ggml-hip/CMakeLists.txt
+++ b/ggml/src/ggml-hip/CMakeLists.txt
@@ -85,14 +85,17 @@ else()
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo3_0-turbo3_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo3_0-q8_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-q8_0-turbo3_0.cu
+        ../ggml-cuda/template-instances/fattn-vec-instance-f16-turbo3_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo2_0-turbo2_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo2_0-q8_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-q8_0-turbo2_0.cu
+        ../ggml-cuda/template-instances/fattn-vec-instance-f16-turbo2_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo3_0-turbo2_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo2_0-turbo3_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo4_0-turbo4_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo4_0-q8_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-q8_0-turbo4_0.cu
+        ../ggml-cuda/template-instances/fattn-vec-instance-f16-turbo4_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo4_0-turbo3_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo3_0-turbo4_0.cu
         ../ggml-cuda/template-instances/fattn-vec-instance-turbo4_0-turbo2_0.cu