32 bit VRAM wall on a 64 bit application? and nVidia CUDA VRAM limits?

[CIBtheGhost]

Hello great citizens of Nexusmods forums,

I've been having some issues with Fallout 4 crashing out right around the Win10 4GB limit that is usually saved for those special hours and hours of trying to get 32 bit applications working with 64 bit resources.

I was using both ENBoost for memory management and ReShade for color correction and found it curious I was even hitting this limit. I was able to verify both dlls used by the overlay and memory manager were both 64 bit and the only other dll would be F4SE which couldn't possibly be 32 bit. But these are easy things to remove from the loop so I removed the ENBoost, ReShade, AND F4SE (while disabling the mods dependent), and still hit the 4048 MB VRAM wall. So I was stumped. Technically, I still am. I suspect it's a MOD someone made using 32 bit tools but I have no way to test this. Anyway, I started to scour the internet and then I ran into an article surrounding CUDA and VRAM limits in Windows 10 that just seems like pure amateur hour by Microsoft, but I digress.

According to a post on some MS Tech Social site, CUDA programs automatically give up 1/8th of the system VRAM as unusable. That's 12.5% of your GPU and RAM. That seems like a ridiculous amount of VRAM to call unusable, especially if you're like me and have 2x11GB GTX 1080 TIs and 32 GB of RAM. I'm giving up ~6GB of non-swap VRAM to CUDA programs.

Granted I don't even know if Fallout 4 is a CUDA program, but if it is, is there anyone who can validate this information?

Also, given that I have several metric tons of VRAM, anyone have any ideas what could possibly be causing me to hit the old 32 bit VRAM wall?

Hardware and software specs

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Windows 10 fully updated

Just updated nVidia drivers

Steam Fallout 4 fully updated with just updated F4SE

ENBoost for Fallout 4 v0283

ReShade 3.4

i7 4790K @ 4.5 gHz

2x11GB EVGA nVidia GTX 1080 TI in SLI

32GB RAM

2x512GB SSD in RAID 0

running resolution 3840x2160 Ultra settings with lots of tweaks to the ini files

 

 

 

My load order sorted with LOOT

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0 0 Fallout4.esm
1 1 DLCRobot.esm
2 2 DLCworkshop01.esm
3 3 DLCCoast.esm
4 4 DLCworkshop02.esm
5 5 DLCworkshop03.esm
6 6 DLCNukaWorld.esm
7 7 DLCUltraHighResolution.esm
8 8 Unofficial Fallout 4 Patch.esp
9 9 TrueStormsFO4.esm
10 a ACS Master.esm
11 b Damage Threshold.esm
12 c HUDFramework.esm
13 d ArmorKeywords.esm
14 e Loads.esm
15 f NewCalibers.esp
16 10 SimSettlements.esm
17 11 SettlementKeywords.esm
254 FE 0 LMNSOverlays.esp
18 12 Realistic Roads 2.0 Black.esp
19 13 Ammo.esp
20 14 LoreFriendlySurvivalChems.esp
21 15 RU556.esp
22 16 GS Beretta PX4.esp
23 17 Binoculars.esp
24 18 McMillanCS5.esp
25 19 WeaponsHD.esp
26 1a M9.esp
27 1b Skibs-IF88Redux.esp
28 1c RU556AWKCR.esp
29 1d CBBE.esp
30 1e The Eyes Of Beauty.esp
31 1f KSHairdos.esp
32 20 VHCE.esp
33 21 Lots More Facial Hair.esp
34 22 Lots More Male Hairstyles.esp
35 23 Lots More Female Hairstyles.esp
36 24 UnlockAllHairstyles.esp
37 25 ExtendedHairColors.esp
38 26 AzarPonytailHairstyles.esp
39 27 KSHairdos_oel.esp
40 28 LooksMenu.esp
41 29 LMBTOverlays.esp
42 2a LooksMirror.esp
43 2b BrighterSettlementLights_ExtraBrightv1.1.esp
44 2c TrueStormsFO4-FarHarbor.esp
45 2d TrueStormsFO4-GlowingSeaExtraRads.esp
46 2e TrueStormsFO4-FarHarborExtraRads.esp
47 2f TrueStormsFO4-NukaWorld-FH-Compat.esp
48 30 DiamondCityOverhaul.esp
49 31 More detailed perk description dlc version.esp
50 32 WelcometoGoodneighbor.esp
51 33 dD-Enhanced Blood Basic.esp
52 34 dD - Limited Blood Decals.esp
53 35 dD - Small Splatter Size.esp
54 36 PD_VisualReload.esp
55 37 MegaExplosions_x2.esp
56 38 EPO Redux.esp
57 39 LongRangeBulletHoles.esp
58 3a Immersive HUD.esp
59 3b CustomCamera.esp
60 3c GCM.esp
61 3d CleanVATS.esp
62 3e More Where That Came From Diamond City.esp
63 3f More Where That Came From - Classic.esp
64 40 Elvani's Track Pack - FIX.esp
65 41 No Audiofilters on the Radio 0.4.esp
66 42 GruffyddsSignsAndPosters.esp
67 43 SignsOfTheTimesCategorized.esp
68 44 Housekeeping.esp
69 45 AutomatronSecuritron.esp
70 46 ACS Master.esp
71 47 ACS Paintings.esp
72 48 BetterModDescriptions.esp
73 49 Armorsmith Extended.esp
74 4a 155mm Howitzer M1.esp
75 4b AES_Renovated Furniture.esp
76 4c BusySettlers.esp
77 4d Crimsomrider's Unique Furniture.esp
78 4e Movable Power Armor.esp
79 4f CleanSettlement Beds.esp
80 50 RealTroughs.esp
81 51 SolarPower.esp
82 52 FunctionalDisplays-Collectibles.esp
83 53 FunctionalDisplays.esp
84 54 FunctionalDisplays-AID-Vanilla.esp
85 55 FunctionalDisplays-MISC-Vanilla.esp
86 56 FunctionalDisplays-Patch-DLC-ALL.esp
87 57 VerticalConduits.esp
88 58 pylonscheap.esp
89 59 PBT_RoN.esp
90 5a spacefiddle_Follower-Stealth-Distance-Fixes.esp
91 5b Move (Get Out the Way).esp
92 5c VisibleCompanionAffinity.esp
93 5d Danse GTFO Power Armor.esp
94 5e CompanionsGoHome_A.esp
95 5f BTInteriors_Project.esp
96 60 BTInt_Optimization.esp
97 61 Nuka World Bottle Fix.esp
98 62 CrimeTown.esp
99 63 TrainBar.esp
100 64 Radiant Clouds and Fogs.esp
101 65 Clean Water - Tropical.esp
102 66 No More Fake Puddles - Nuka World 1-0.esp
103 67 TrueGrass.esp
104 68 Immersive Wasteland Grass.esp
105 69 CommonwealthConifersREDUX.esp
106 6a FO4 Landscape Overhaul.esp
107 6b Vivid Fallout - All in One - 4k.esp
108 6c WET.esp
109 6d waterLODfix.esp
110 6e PowerArmorNoSneak.esp
111 6f Tougher Vertibirds.esp
112 70 TakeCover.esp
113 71 CCOFO4 - Traits and More Perks.esp
114 72 No Legendary Items From Creatures.esp
115 73 STL_SneakRadioDebuff.esp
116 74 Pack Attack.esp
117 75 Pack Attack - Far Harbor Patch.esp
118 76 Assaultron Combatron.esp
119 77 PlutoniumCreatures.esp
120 78 Docile Radstags.esp
121 79 strongheight.esp
122 7a CraftableAmmo.esp
123 7b CraftableAmmo_plus.esp
124 7c Loads of Ammo - Leveled Lists.esp
125 7d Crafting Workbenches - Removed Crafting Experience.esp
126 7e Crafting Workbench.esp
127 7f Crafting Workbenches - Ammo.esp
128 80 Crafting Workbenches - Ammo Expanded.esp
129 81 Crafting Workbenches - Ammo Special.esp
130 82 Crafting Workbenches - Automatron DLC.esp
131 83 Crafting Workbenches - Junk Items.esp
132 84 Crafting Workbenches - Power Armor.esp
133 85 Crafting Workbenches - Pre War and Manufactured.esp
134 86 3dscopes-framework.esp
135 87 EFF.esp
136 88 3dscopes.esp
137 89 3dscopes-AddToSpawnList.esp
138 8a clothingoverhaul.esp
139 8b Pip-Boy Flashlight.esp
140 8c Eli_Armour_Compendium.esp
141 8d RRTV_GoodneighborCondo.esp
142 8e Diamond City Enhanced.esp
143 8f LegendaryModification.esp
144 90 LegendaryModification2LM.esp
145 91 LegendaryModification2LMAKPatch.esp
146 92 LegendaryModificationMisc.esp
147 93 [mvt]PluginByGownoWriter.esp
148 94 SanctuaryHotSpringHome.esp
149 95 TP-Redux.esp
150 96 Diverse Cats.esp
151 97 Eli_Rockin Red Rocket.esp
152 98 CheatTerminal.esp
153 99 Ketaros_Magazines.esp
154 9a MilitarizedMinutemen.esp
155 9b Immortal Cats 2.esp
156 9c WhirligigSentry.esp
157 9d New Magazines_(Frost).esp
158 9e CorvalhoWidowShotgun.esp
159 9f F4NVServiceRifleRedux.esp
160 a0 crx_HammerTime_Sanctuary.esp
161 a1 NWTransCenLOD.esp
162 a2 StarlightLOD.esp
163 a3 Eli_Bunker.esp
164 a4 AK74M.esp
165 a5 P99.esp
166 a6 GS Benelli M3S90.esp
167 a7 dD - MoreBloodandBits.esp
168 a8 LooksMenu Customization Compendium.esp
169 a9 AndromedaRadioSave1.esp
170 aa JetfuelRadio.esp
171 ab AUG-A1.esp
172 ac RSh-12.esp
173 ad Modern Weapon Replacers - All-in-One Pack Variant 1.esp
174 ae Extended weapon mods.esp
175 af OWR.esp
176 b0 OWR_NIN.esp
177 b1 SimSettlements_MegaPack_YearOne.esp
178 b2 SettlementTidyBot.esp
179 b3 NewCalibers_extendedWeaponMods.esp
180 b4 Esk_NoTeleportingCreatures.esp
181 b5 Ferals After Dark.esp
182 b6 3dscopes-servicerifleaddon.esp
183 b7 McMillan CS5 - See Through Combat Scopes Patch.esp
184 b8 SettlementMenuManager.esp
185 b9 BetterModDescriptionsAE.esp
186 ba BetterModDescriptionsEWM.esp
IF88TacShotgun_BMD_Main.esp
187 bb BetterModDescriptionsLMNormal.esp
188 bc BetterModDescriptionsLM2LMNormal.esp
189 bd BetterModDescriptionsLMMiscNormal.esp
BetterModDescriptionsLME.esp
190 be BetterModDescriptionsSTCSAdd.esp
191 bf Realistic Death Physics - ALL DLC.esp
192 c0 dD-Realistic Ragdoll Force.esp
193 c1 mcgFemaleWalk.esp
194 c2 SSNPC - DCResidentsAIO.esp
195 c3 mcgFemaleWalk-Granny-eng.esp
196 c4 mcgFemaleWalk-Granny-ru.esp
197 c5 dD-Reduced Explosion Force.esp
198 c6 DeadBodyCollision.esp
199 c7 Swinging Meat Bags.esp
200 c8 Lower Gun Timer.esp
201 c9 Crimsomrider's Accessories.esp
202 ca Piercings.esp
203 cb HN66Fo4_Rings.esp
204 cc HN66Fo4_EarringsV1.esp
205 cd Elegant Hardware.esp
206 ce Elegant Hardware AWKCR.esp
207 cf EAMR.esp
208 d0 ClothingOverhaulSP_XB1_PC.esp
209 d1 Clothing Of The Commonwealth.esp
210 d2 SuperMutantClothes.esp
211 d3 Ballistic Under-Armor 1.3.esp
212 d4 DX Commonwealth Shorts.esp
213 d5 DX Vault Girl Shorts.esp
214 d6 SuperMutantClothes-Leveled List_90.esp
215 d7 ImmersiveVendors.esp
216 d8 Marmo1233 - Immersive Settlers.esp
217 d9 BetterSettlers.esp
218 da BetterSettlersCleanFacePack.esp
219 db BetterSettlersNoLollygagging.esp
220 dc BetterSettlersCCAPack2.0.esp
221 dd BS NS BFS Merged Patch.esp
222 de BetterSettlersMostlyFemale.esp
223 df FlirtyCommonwealthFemale.esp
224 e0 CatCreaturesSettlement.esp
225 e1 More Realistic Cats.esp
226 e2 Immortal Cats - Cat Meat to Cat Food.esp
227 e3 VisibleWeapons.esp
228 e4 Holsters & sheaths.esp
229 e5 AnS Wearable Backpacks and Pouches.esp
230 e6 AnS Wearable Backpacks and Pouches - Ballistic Weave.esp
231 e7 AnS Wearable Backpacks and Pouches - No Crafting Perks.esp
232 e8 Friffy_Holstered Weapons.esp
233 e9 CS5 Apparel.esp
234 ea Visible Weapons Extended - AK74M.esp
235 eb Visible Weapons Extended - AUG.esp
236 ec Visible Weapons Extended - RU556.esp
237 ed ImmersiveFastTravel.esp
238 ee IFT_Automatron.esp
239 ef IFT_NoFuel.esp
240 f0 IFT_NoQuest.esp
241 f1 IFT_Worker.esp
242 f2 VegetableOil.esp
243 f3 Vertibird Alt Fix - Far Harbor.esp
244 f4 Extra_Tracks_Classic.esp
245 f5 Extra_Tracks_Diamond.esp
246 f6 EnhancedLightsandFX.esp

 

 

Thanks for reading!

[Deleted3082751User]

pretty sure microsoft fixed the 4gb vram limit quite along time a go now. believe it was somewhere in 2017, it was originally part of a beta update, that users had to opt in for, but i am pretty sure it has made it into a public update by now (if not then wtf microsoft. not that affects me though stiil being on the magical windows 7 xD). i could be wrong however as i do not and will not use windows 10.

 

not too mention that the 4gb vram limit is actually only for 32bit applications.

 

so in other words both fallout 4 and skyrim special edition does not and never had a 4gb vram limit. as they are both 64bit applications (which supports a practically endless amount of ram).

 

only those that was on windows 10 and played oldrim, were affected by the 4gb vram limit.

 

so the key question is, are you definitely sure you are on a 64bit edition of windows 10.

 

also SLI could be causing issues in fallout 4. try disabling sli, and see if that fixes or at least improves the game.

 

running sli has its own potential issues, from bad scaling, to Dual GPU running worse then a single GPU, you also have the potential Heat Issues.

 

and you are also running the game at 4k Monitor Resolution, with some Demanding mods (having a quick look through your mods), this will consume a lot of memory very quickly. i mean just running the game completely in 4k textures can easily exceed, 8GB Vram and 16GB System Ram. so while you do have more, if you was to have your entire game in 4k textures, as well as 4k resolution, you could very well hit your GPU Max Vram @ 11GB (as SLI does not stack Vram) and of course you are on windows 10, so you have a lot of redundant services eating your resources, and other windows 10 crap, consuming availble resources, so the maximum amount of availble resources you thought you had is much less.

 

their is a very good chance that you are definitely exceeding the so called 4GB Vram Limit (especially as this limit should not even apply to you, unless you happen to be on windows 32bit, which i cannot imagine you would be with the hardware you have), easily. so whatever you are using to monitor the Vram Usage clearly is not showing the correct numbers.

 

also putting a 4GB Memory limit on a 64bit application would be a major flop on microsoft behalf, i highly doubt they would be that stupid.

 

also the Creation Kit is a 64bit Tool, so any mod made using this tool would not be a 32bit mod

 

and all tools you mentioned would be 64bit programs, as they would have had to be updated for 64bit applications. even so, even if they were/are 32bit programs it would not affect the game's memory management, and likewise would not impose a memory limit.

Edited August 6, 2018 by Guest