Min/Max Boards

Azurin^MoI - Azurin has one bonus feat which is great! An extra essentia might be helpful(remember questionable midnight metamagic feat trick?). However the reason, making this race purple not blue, is its stats v.s. age categories. Middle/Old/Venerable ages gives you physical-1, mental+1/physical-2, mental+2/physical-3, mental+3! Hence a venerable age grants you Int/Wis/Cha+6 totally. It means if you point buy a Int 18, you will get Int 24 at the very beginning, though Con-6 indeed hurts. But what if you play a undead wizard? Using Necropolitan template will exempt you from the huge Con penalty while it gives you great undead traits. It is true that Necropolitan will grant you one negative level and 1000xp lost, but you will catch up soon right?

Buomman^PlH - No Int/Con boost plus the vow that you cannot speak. It means you need spend extra feat to cast spells. Bad race for wizards.

Changelings^RoE - Two reasons make this race blue: Racial Emulation feat and Recaster prestige class. Both of them are from Races of Eberron. Plus, Changeling wizard substitution has more skill points.

Daelkyr Half-Blood^MoE - An interesting race in Magic of Eberron. At first level you gain one symbiont, and Symbiont Mastery bonus feat. At 5th, 10th and 15th levels, you can change a new one. Some of symbiont's abilities are decent. Besides symbiont has share spell as supernatural ability which is even greater than Familiars', since their share spell ability can share spell/spell-like abilities to their master back! Symbionts in certain senses are like Familiars. It will essentially boost the efficiency of your fighting.

Deep Imaskari^Und - +2 Int is good boost. -2 Dex doesn't hurt very much. Recalling one 1st level spell per day is nice for low level games.

Dream Dwarf^RoS - Inherited stat boost from dwarves plus some minor boosts on Divination spells. See more discussion on Dwarves entry.

Duskling^MoI - Duskling's Stats v.s. Age Categories is same as Azurin,  but +2 Con/-2 Int somewhat offset venerable age trick. Besides, Duskling has Fey type, qualifying for the feat Beauty's Bounty(http://www.wizards.com/default.asp?x=dnd/fey/20030815a), which allows you to use Cha bonus to determine your Hit points. You invest a feat and get important stats boosted, it's still a decent choice.

Dwarves^Core - +2 Con boost is always welcomed, plus some other small racial traits. So far it barely beats the average races. However in RoS there is 5-levels PrC called Runesmith only accessible to Dwarves. Its 3rd lv Share Runes and 5th lv Permanent Rune class abilities make this PrC quite strong and interesting, and thus make Dwarves being wizards competitive! (Thanks @MirddinEmris for reminding me this great PrC)

Elan^XPH - It is designed for Psion not Wizard. Don't pick this one, unless you consider a Psion/Wizard dual progression, in which case it is green

Elves^Core - Maybe you are surprised that I rate elves orange, while elves' favorite class is wizard. However in my opinion, +2 Dex boost cannot compensate the -2 Con at all.

Gnomes^Core - +2 Con, small size and qualify for Shadowcraft Mage, But if you want to enter Shadowcraft Mage, why not using Whisper Gnome

Goblins ^Core - +2 Dex/-2 Str/-2 Cha, small size are not sufficient to make it green.

Gray Elf^Core - A Str-2/Dex+2/Con-2/Int+2 plus some minor immunity race. If only core resource allowed, it is a blue choice as well.

Half-Elves^Core - Nothing special, a rather mediocre choice

Half-Orcs^Core - -2 Int/-2 Cha, one of the worst choice ever.

Halflings^Core - +2 Dex/-2 Str and small size are small boosts to wizards.

Hellbred^FC2 - An interesting and potentially broken race for wizard. First you have Devil’s Favor as a bonus feat. Secondly You have Body or Spirit options to choose once you use this race. Spirit aspect brings -2 Con/+2 Cha(bad....), but Telepathy ability, which allow you to qualify for Mindsight feat in LoM! On the other hand, Body aspect gives you +2 Con/-2 Int(terrible...), BUT TWO additional devil-touched FEATS at the 4th and 14th HD. So totally it is three devil-touched feats. Devil-touched feats themselves are not impressive. However you can somehow SHUFFLE them to ANY OTHER feats by spells Embrace the Dark Chaos & Shun the Dark Chaos in FC1! If these two spells allowed by your DM, this race is an absolute-even-beyond purple choice! If not, it returns to a green race

Human^Core - Human could be a good choice for any classes because of the extra bonus feat and skill points. As mentioned at the very beginning, wizard is a feat-starving class. Bonus feat is superior to anything else when picking up race.

Illumian^RoD - Illumian's sigils are great. Aeshkrau allows you to substitute Str for Int to determine your bonus spells. Boosting Str is MUCH EASIER than Int (Bite of the Werebear gives you +16 Str, Giant Size, cast by Miracle, gives +16~32 Str and etc.). In addition, Sigil Krau provides CL+2(up to HD). It's very good if you lose caster level, want to dip other classes or enter dual spellcasting classes. Besides, Naenhoon is another decent choice. If you have turn attempts, free metamagic spells twice per day.

Kalashtar^ECS - It is not meant to be a wizard. However if you consider psion/wizard dual progression, it is indeed a blue choice, because of its strong performance on psionic aspect.

Killoren^RotW - Nothing quite outstanding but Stats v.s. Age Categories which is the same as Azurin. Killoren could only reach old category. It means you have -3 physical/+3 mental stats. It is a good race for Druid/Wizard dual progression.

Kobold^RotD - A Cliche-broken race, because of Dragonwrought feat. Almost same reason as above, a venerable Dragonwrought Kobold grant +3 to all mental stats. However it is not sufficient to rate this race purple. Investing a feat on only +3 mental stats in principle is a bad choice. The truth is actually that a venerable Dragonwrought Kobold is qualified for epic feats even at 1st character level. Furthermore it is questionably qualified for Sovereign Archetypes stuff in Dragon of Eberron(your DM maybe refuse this because only TRUE DRAGON qualifies Sovereign Archetypes). At last don't forget those rites and greater rites from RotD and website enhancements if you consider sorcerer in some certain wizard builds, Ultimate Magus for example.

Lesser Gray Dwarves^PGtF - A +2 Con/-4 Cha race, lesser version of Gray Dwarves. +2 Con is good, but -4 Cha hurts a little bit. An average choice.

Lesser Drow^PGtF - See elves.

Lesser Deep Gnome^PGtF - Bad replace +2 Con by +2 Dex from standard Gnomes. If you want to use Gnome or access to Shadowcraft Mage, choose another kind of Gnomes please.

Lesser Aasimars^PGtF - +2 Wis/+2 Cha are not correct boosts. An average choice for wizards.

Lesser Tieflings^PGtF - +2 Dex/+2 Int/-2 Cha, plus small racial traits make it green.

Neraphim^PlH - No bonus feat or Int boost. But it is LA +0 Outsider. It means you have outsider traits and master all martial weapons and so on. Come up with spell alter self/polymorph in early-middle games would be very powerful, but at high levels games it performs bad because of shapechange spell

Maenad^XPH - Similar to Elan, but even in dual progression it is an average choice.

Mongrelfolk^RoD - +4 Con/-2 Int/-4 Cha, and Emulate Race is an interesting trait, allowing you to use magic item available to other races and boost your UMD skill. But in general it is not designed for wizards. If you play a tainted scholar, it is a blue choice

Orcs^Core - Similar to Half-Orcs

Raptoran^RotW - Similar to Killoren, but Raptoran can reach venerable age. With Necropolitan template -6 physical/+6 mental stats is good for sure. Good race for Cleric/Wizard dual progression.

Rilkan & Skarn^MoI - Similar to Duskling, in anyway you need the venerable + Necropolitan tricks. But if you want to use this trick why not choose Azurin?

Sea Kins^RoD - no highlights to be a wizard, an average race.

Shifters^ECS - +2 Dex/-2 Int/-2 Cha makes it a bad choice.

Spellscales^RotD - -2 Con/+2 Cha hurts you, however it has some nice abilities available. First it grant you dragonblood subtype. Secondly, Blood Quickening ability is interesting: worthy of notice is that Io grants HD/2 bonus on SPELLCRAFT skill and 3 uses of Empower Spell feat. If you enter Incantatrix prestige class, consider this race!

Silverbrow Human^DrM - Silverbrow is a variant race of human. It grants you the bonus feat as human, while trading off extra skill points for dragonblood subtype. Dragonblood is the prerequisite of lots of feats in RotD, and thus is of importance. Dragonblood subtype usually need to take feat to obtain. It hence alternatively saves you one more feat!

Strongheart Halfling^RoF - Similar to Human, bonus feat plus small size and +2 Dex boost.

Synad^CP - A good choice for Psion, however because of his Multitask ability, it's a nice pick for spellcasting class as well.

Underfolk^RoD - Similar to Sea Kin, rather mediocre choice.

Warforged^ECS - A Dex-2/Con+2/Wis-2 Warforged doesn't grant feats or boost Int. However there is a 9th spell in SPC called Awaken Construct which grants any constructs with 3d6 mental stats. If you can find someone, for example artificers or yourself when advancing to 17lvl, casting maximized and empowered awaken construct, you will get 25 Int/Wis/Cha! Further consider aged+dragonborn template, your stats will be Str-1/Dex-5/Con+3/Int 26/Wis 24/Cha 26! You can even point buy a Con 18. Besides dragonblood subtype and many immunity from living construct subtype, the arcane spell failure from your plate has been offset by dragonborn as well. Awakened Middle aged Dragonborn Warforged = Optimized option!

Whisper Gnome^RoS - +2 Dex/+2 Con and small size are good for wizards. However It is a blue race because of the powerful prestige class Shadowcraft Mage

Aasimar^RoD - Didn't boost correct stats, but bestow you a LA. Even though you are outsider, it is not worth at all.

Catfolk - One LA for +4 Dex/+2 Cha, not worth of it at all

Chaos Gnome^RoS - +2 Dex/+2 Con/+2 Cha/-2 Str and small size are decent. Spell power(+1 CL for spells with Chaos descriptor) is nice. Immunity to Confusion effects is good. Luck of Chaos(reroll one roll once per day) is awesome. In sum, it is a good trade-off for one LA. Furthermore, don't forget the Shadowcraft Mage option!

Sharakim^RoD - +2 Int is good, but you get one LA for other useless traits

Tiefling^RoD - +2 Dex/+2 Int/-2 Cha and becoming outsider are decent, though you get one LA.

Half-Ogre^RoD - 2 LA without correct stats boost

Strength: Not important at all in most cases, please dump it as much as possible. Especially at high levels, it's easy to immune ability damage or acquire incorporeal subtype. In low level games, a 6-8 Str is enough.
Dexterity: Dex improves your touch AC, ranged AB and Ref save. Many spells require ranged AB and Ref is poor save for wizard. So it's worthy of pumping it more or less especially at low levels, but a 14 Dex is fairly enough.
Constitution: Second stat to max regardless of classes. It determines your hit points, the very possibility to survive in any games. Unless you play a undead wizard, otherwise pump it at least to 14 Con.
Intelligence: Max it!! It determines your spellcasting ability and capacity, skill points and so forth. The most important stat for wizard!
Wisdom: Because wizard is a strong will class, you can dump it more or less. Making a 6-8 Wis is OK, unless you want to play a tainted scholar.
Charisma: Arguably the third stat to pump compared to Dex. Because it is related to stuffs like leadership scores, social/UMD skills, some important spells' effects, and EVEN DMM. Since Cha is the easiest to boost in 6 stats by spells/feats/items, you might keep it on average.