Welcome too.
I am having this same behavior. I have a decently sized FAB Library of Assets and when I launch the Epic Games Launcher - My VRAM Spikes to around 2-3gb in use. Even when the FAB Library syncs all the assets it still does not release the VRAM. This usage issue is still happening as I just built this new PC.
Welcome to post.
Really surprised, that there hasn’t been a bigger buzz or a real solution yet, considering that the launcher reaches a mad insane 8-10gb of VRAM on my end( I’d assume that people with larger Vault Caches could be facing potentially more than 16gb of VRAM), meaning that I can’t really use the launcher on my notebook anymore, which only has 6gb of VRAM, while it leaves me with just 2gb of free VRAM on my PC with an RTX4070 with 12gb of VRAM.
And there also isn’t any real solution besides not opening the Unreal Engine tab and maybe not opening FAB tab either, which makes working with the Engine more difficult.
I’m on Windows 11 on both devices, and my Vault Cache is also very large.
@gjohn167 Any news?
Hello Everyone,
Thank you to everyone who has provided me with DxDiags, reports of this issue, screenshots, and other information. I greatly appreciate your patience and passion for this issue!
I have been updating the Launcher team about this thread since December 2024, and will continue to do so until a resolution is found. Please note that this is generally outside my scope of support; however, I’m doing everything possible to ensure that the right people are aware of this issue so that a fix can be found as soon as possible.
I will continue to update this thread when I have more information. I expect to have an update for you soon, so look forward to hearing back from me!
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Epic you are so funny. This problem has been around for several years and was described above. For those who have a large library of Fab(since UE Marketpace) assets, when launched, the launcher apparently loads something into VRAM, perhaps images of assets; on my 8GB video card it loads 7.3GB, as soon as I close the launcher I have the original 600MB again. I also tested it on a video card with 2GB VRAM, in the same case a large amount is loaded into RAM.
I hope the geniuses of the launcher developers are in no way connected with the UE5 development team, although they know the requirements of UE5 
Ask the Steam team, or at least Ubisoft, EA to record a training course for you on how to make a normal launcher 
. Considering how old the problem is, maybe you think that those using UE5 should not play games in their Epic library.
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Still does it one year later btw. Seems to be related to my ever growing FAB library. The more I scroll into it, the more gpu memory it consumes.
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Hello,
Thank you for letting me know! I will continue to flag this with my resources and advocate for its prioritization. We are aware that this has been an ongoing issue for an extended period of time, so I’m very grateful for your patience as we continue to investigate.
For any newcomers to this thread, please continue to let us know how this impacts you. I will continually advocate for a swift resolution.
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Besides using UE5, I also have games and keep the app closed to save VRAM.
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