diff --git a/README.md b/README.md
index 11679a8..b26fc2b 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,20 @@ Answers to accelerate config:
 - fp16
 ```
 
+### Optional: CUDNN 8.6
+
+This step is optional but can improve the learning speed for NVidia 4090 owners...
+
+Due to the filesize I can't host the DLLs needed for CUDNN 8.6 on Github, I strongly advise you download them for a speed boost in sample generation (almost 50% on 4090) you can download them from here: https://b1.thefileditch.ch/mwxKTEtelILoIbMbruuM.zip
+
+To install simply unzip the directory and place the cudnn_windows folder in the root of the kohya_diffusers_fine_tuning repo.
+
+Run the following command to install:
+
+```
+python cudann_1.8_install.py
+```
+
 ## Upgrade
 
 When a new release comes out you can upgrade your repo with the following command:
diff --git a/cudann_1.8 install.py b/cudann_1.8 install.py
new file mode 100644
index 0000000..8bd6d76
--- /dev/null
+++ b/cudann_1.8 install.py	
@@ -0,0 +1,109 @@
+import filecmp
+import importlib.util
+import os
+import shutil
+import sys
+import sysconfig
+import subprocess
+from pathlib import Path
+if sys.version_info < (3, 8):
+    import importlib_metadata
+else:
+    import importlib.metadata as importlib_metadata
+
+req_file = os.path.join(os.path.dirname(os.path.realpath(__file__)), "requirements.txt")
+
+def run(command, desc=None, errdesc=None, custom_env=None):
+    if desc is not None:
+        print(desc)
+
+    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, env=os.environ if custom_env is None else custom_env)
+
+    if result.returncode != 0:
+
+        message = f"""{errdesc or 'Error running command'}.
+Command: {command}
+Error code: {result.returncode}
+stdout: {result.stdout.decode(encoding="utf8", errors="ignore") if len(result.stdout)>0 else '<empty>'}
+stderr: {result.stderr.decode(encoding="utf8", errors="ignore") if len(result.stderr)>0 else '<empty>'}
+"""
+        raise RuntimeError(message)
+
+    return result.stdout.decode(encoding="utf8", errors="ignore")
+
+def check_versions():
+    global req_file
+    reqs = open(req_file, 'r')
+    lines = reqs.readlines()
+    reqs_dict = {}
+    for line in lines:
+        splits = line.split("==")
+        if len(splits) == 2:
+            key = splits[0]
+            if "torch" not in key:
+                if "diffusers" in key:
+                    key = "diffusers"
+                reqs_dict[key] = splits[1].replace("\n", "").strip()
+    if os.name == "nt":
+        reqs_dict["torch"] = "1.12.1+cu116"
+        reqs_dict["torchvision"] = "0.13.1+cu116"
+
+    checks = ["xformers","bitsandbytes", "diffusers", "transformers", "torch", "torchvision"]
+    for check in checks:
+        check_ver = "N/A"
+        status = "[ ]"
+        try:
+            check_available = importlib.util.find_spec(check) is not None
+            if check_available:
+                check_ver = importlib_metadata.version(check)
+                if check in reqs_dict:
+                    req_version = reqs_dict[check]
+                    if str(check_ver) == str(req_version):
+                        status = "[+]"
+                    else:
+                        status = "[!]"
+        except importlib_metadata.PackageNotFoundError:
+            check_available = False
+        if not check_available:
+            status = "[!]"
+            print(f"{status} {check} NOT installed.")
+            if check == 'xformers':
+                x_cmd = "-U -I --no-deps https://github.com/C43H66N12O12S2/stable-diffusion-webui/releases/download/f/xformers-0.0.14.dev0-cp310-cp310-win_amd64.whl"
+                print(f"Installing xformers with: pip install {x_cmd}")
+                run(f"pip install {x_cmd}", desc="Installing xformers")
+
+        else:
+            print(f"{status} {check} version {check_ver} installed.")
+
+base_dir = os.path.dirname(os.path.realpath(__file__))
+#repo = git.Repo(base_dir)
+#revision = repo.rev_parse("HEAD")
+#print(f"Dreambooth revision is {revision}")
+check_versions()
+# Check for "different" B&B Files and copy only if necessary
+if os.name == "nt":
+    python = sys.executable
+    bnb_src = os.path.join(os.path.dirname(os.path.realpath(__file__)), "bitsandbytes_windows")
+    bnb_dest = os.path.join(sysconfig.get_paths()["purelib"], "bitsandbytes")
+    cudnn_src = os.path.join(os.path.dirname(os.path.realpath(__file__)), "cudnn_windows")
+    cudnn_dest = os.path.join(sysconfig.get_paths()["purelib"], "torch", "lib")
+    
+    print(f"Checking for CUDNN files in {cudnn_dest}")
+    if os.path.exists(cudnn_src):
+        if os.path.exists(cudnn_dest):
+            # check for different files
+            filecmp.clear_cache()
+            for file in os.listdir(cudnn_src):
+                src_file = os.path.join(cudnn_src, file)
+                dest_file = os.path.join(cudnn_dest, file)
+                #if dest file exists, check if it's different
+                if os.path.exists(dest_file):
+                    shutil.copy2(src_file, cudnn_dest)
+            print("Copied CUDNN 8.6 files to destination")
+
+    # diffusers_cmd = "git+https://github.com/huggingface/diffusers.git@8e74efa#egg=diffusers --force-reinstall"
+    # run(f'"{python}" -m pip install {diffusers_cmd}', "Installing particular diffusers commit", "Couldn't install diffusers")
+    # #install requirements file
+    # req_file = os.path.join(os.path.dirname(os.path.realpath(__file__)), "requirements.txt")
+    # run(f'"{python}" -m pip install -r "{req_file}"', "Updating requirements", "Couldn't install requirements")
+            
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