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Will using Mentats before handing in quests affect experience gain? I'm piling up a few quests to hand in. If I buff my Intelligence two points with Mentats, will I get more experience when I hand in the quest? Do the Mentats bonuses stack?

  • I suggest editing this to ask about all temporary INT bonuses, not just Mentats. It will be more useful for future users. – DCShannon Nov 17 '15 at 18:28
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    You can also save scum idiot savant bonus if you really wanted to. I think I've gotten 2000+ xp from one quest before when the bonus happened to trigger. – l I Nov 17 '15 at 18:56
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Yes, using Mentats is just like having two extra Intelligence points for extra experience when handing in a quest. However, you can't stack more than one Mentats effect at a time (two extra points is the max).

Apparel

If someone could confirm this in the comments below, I'd appreciate it. I think the easiest place to find the hat+body items is the Quincy Ruins. You can head there at the beginning of the game straight past Diamond City. In the middle of the town (held by raiders) is a storefront (Guns, guns, guns, it's called) that has a bunch of clothing items on an open shelf. One of them is the Ushanka Hat. I also went to the top floor of this building and found a Vault-Tec Lab Coat in the dresser next to the bed. (Can someone confirm whether this is random or a set item?)

  • Vault-Tec Lab Coat (+2 INT – locations)
  • Press Hat (+1 INT – trade with Piper when she becomes your companion)
    • Alternative: Ushanka Hat (+1 INT – Quincy Ruins, see above)
  • Liam's Glasses (+2 INT – at end of Plugging a Leak quest late in the game)
    • Alternative: Road Goggles (+1 INT – locations)

These items add to the Intelligence stat for extra exp gain atop Mentats when handing in quests. 10 (maximum base INT) +5 (apparel additional INT) +2 (temporary Mentats buff) = 17 INT points!

Sleep

Waking from sleep with a "well rested" notification denotes a 10% experience buff for 12 hours (though I haven't been able to confirm this myself). If you sleep with a romanced partner, the bonus increases to 15% ("Lover's Embrace").

  • I've started wearing the Vault-Tec Lab Coat when turning in quests. You find it in Vault 111. It does stack with Mentats. I've also seen a hat that added +1 to INT, but I can't recall where I found it. – DCShannon Nov 17 '15 at 18:28
  • @DCShannon: Good advice. Where is it in Vault 111? The Fallout wiki only has it in a different area: fallout.wikia.com/wiki/Vault-Tec_lab_coat – Wolf Nov 17 '15 at 18:53
  • There's some inconsistency on that wikia. This page lists the coat as having +2 to int, which is correct. Perhaps the name isn't right, and there are two similarly named pieces of clothing. I'll have to check when I get home. The coat I'm thinking of is on a corpse in Vault 111. I think it was the overseer. – DCShannon Nov 17 '15 at 19:05
  • It's definitely the Vault-Tec Lab Coat, and it's definitely +2 to INT, but I loaded a save from right before I left the vault, and I didn't have the coat yet, so I guess it's not in the vault. I found it real early in both my playthroughs. I'll have to figure out where I got it. Piper is wearing a Press Hat, which gives +1 to INT. – DCShannon Nov 18 '15 at 0:47
  • Being Well-rested is also probably useful. – MikeTheLiar Nov 18 '15 at 21:12
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In addition to the above menioned items I want to explain more about the idiot savant perk. Basically It is always a good pick till level 2. Why? Easy! There are two ways to boost your XP gain on a int/savant basis.

First one is INT 2 and idiot savant 2. The outcome is an avarage XP boost of 1.484. With each further INT level the chance to proc the idiot savant drops. Your XP boost drops, because the additional XP due to more INT does not overcome the lost XP due to the lower idiot savant proc probability. But luckily that changes after you get INT to a higher level.

Second one INT 15 and idiot savant 2. At INT 15 you gain more XP than with the first method. The probability of an idiot savant proc is 1% if you reach INT 10 and above. But the bonus XP due to your INT overcompensates that after you reach int 15. You have a boost of 1.508 now (or 1.45 without idiot savant, which means you need int 17 now to get 1.51).

Source: http://fallout.wikia.com/wiki/Idiot_Savant

PS: When getting XP for a quest and the perk idiot savant is skilled: Quicksave and turn in the quest. Idiot savant can proc for a quest reward! Did not proc? Reload and reload and reaload... till profit!

2

Further to Wolf's accepted answer, there are a couple of extra options to increase XP gain, and even more with DLCs. Also, there is an important note regarding Liam's glasses.

Maximum base INT is 12, not 10:

  • once your INT is 10, decrease it using alcohol and then use "You're SPECIAL!" book
  • finally collect the bobblehead

Apparel:

  • Liam's glasses give +2 INT - they are however quite far down the main storyline, require to not join the Railroad (if you completed Tradecraft quest, Plugging a Leak won't be available) and are exclusive with Ballistic Weave and Institute Killer Weave clothing mods. Deliverer pistol can still be obtained by doing Tradecraft partially
  • Destroyer's Helmet gives +1 INT - sold by Penny Fitzgerald in Covenant
  • Far Harbour DLC: The Captain's Hat gives +2 INT
  • Lab Coat outfit (cannot be worn under armor) gives +2 INT - note that there is about a dozen of variations like Vault Lab Coat, Institute Lab Coat, Dirty Lab Coat etc.
  • Mechanic Jumpsuit outfit gives +1 INT
  • legendary armor pieces with Sharp prefix give +1 INT - they cannot be worn over Lab Coat but they would give +5 INT instead of +2 INT (set difficulty to highest to increase the number of legendary enemies spawning)
  • Nuka World DLC: Fancy Suit & Tie gives +1 INT and can be worn under armor
  • Creation Club: Military Backpack with Institute patch gives +1 INT
  • Nuka World DLC: Lucky Rabbit's Foot gives +10% XP when equipped - it is a grenade which does nothing when thrown, apparently it has a very, very low chance of dropping from any Nuka World raider

Power armor:

  • helmet's Internal Database misc mod gives +2 INT

Consumables:

  • Berry Mentants give +5 INT - doesn't stack with Mentats
  • X-cell gives +2 INT - stacks with Mentants, however it is quite rare
  • Squirrel Stew gives +2% XP for 2 hours (I think these are real time hours)

Perks:

  • Piper's companion perk doubles XP for persuasion and location discovery
  • Nuka World DLC: Porter Gage's companion perk gives +5% XP for kills
  • Idiot Savant (req. LCK 5) gives a chance of gaining x3 or x5 XP
  • Night Person (req. PER 6) gives +2 or +3 INT at night
  • Well Rested / Lover's Embrace
1

Higher INT = larger XP gains. Don't forget when you level you can increase any one of your SPECIAL stats, incluing INT.

The simplest way to get an XP bonus when turning in quests is to sleep for 1 hour in an owned bed.

The Idiot Savant perk also has a chance to give you x3 or x5 (second level) xp gains at random, though the chances are higher the lower your INT.

Donning INT boosting gear is another method of increasing XP gains.

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The single strongest increase to XP gain is the Idiot Savant perk.

At any value of Int below ten, Idiot Savant, or going from IS1 to IS2, offers a larger XP bonus than an additional point of Int. In fact, so long as your final Int remains below 10, going up one rank in IS provides a nearly identical bonus to XP than the entire 7 points of Int you can gain from Apparel and Chems. For example, starting from 1 Int, Idiot Savant would take you from +3 to +23.6% XP. Going to 8 Int via chems and apparel would bring you to 24%. And of course, if you did both, and had IS + 8 Int, you'd be at +31.4.

There are some good charts with the actual numbers involved here.

The tl;dr is that if you want to maximize XP gain, you should always take Idiot Savant, however, boosting Int may or may not be a net gain after that fact.

  • Doesn't Idiot Savant only activate randomly? How consistent would this be as an alt strategy? – Wolf Dec 6 '15 at 16:20
  • @Sean the numbers cited in the linked chart reflect the average gain over time, taking the random proc rate of Idiot Savant into account. If you were willing to savescum large XP gains such as quest turn ins, you would see dramatically higher returns. – LessPop_MoreFizz Dec 6 '15 at 16:21
  • Depends on the players preference, but you have a good idea that your handing in the quest, before you hand it in. If you really wanted to guarantee the experience bonus, and maximise it, you could push for 11 intelligence (w/ bobblehead), save before handing in the quest, and repeatedly reload and repeat until the bonus activates. – user106385 Jul 15 '16 at 2:42
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You can use clothing and legendary armor to buff your intelligence. Ushanka hat and the vault tech lab coat are good if you can't find any armor, but the armors can give you more overall than the coat can.

The idiot savant perk can help as well, but the higher your intel the less often it happens.

Mentats give you an intel boost but they don't stack. Squirrel stew will boost your xp for 2 hours. Three of the live and love magazines also boost xp. One for persuading men, one for women, and one for travelling with a companion. There's also a bobblehead that gives you a perm +1to intel, but I think you need to have 10 intel for it to give you 11.

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Just saying I find getting the most xp out of a quest is to have idiot savant and lowest intellegence. You can up 5x the normal amount. So say if you got 200xp with no boosts whatsoever you would 1000xp instead (with max idiot savant). The only con to this is that it doesn't always happen. That's why the lower your intellect the better chance.

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