This page is obsolete and his kept here just for legacy sake.
The current guides are here:
Here are a few of the most popular and useful Death Knight PVP specs at the moment.
UPDATED for Cataclysm
2H Frost Build
Frost (31 Points)
Runic Power Mastery - Rank 3/3
Increases your maximum Runic Power by 30.
Icy Reach - Rank 2/2
Increases the range of your Icy Touch, Chains of Ice and Howling Blast by 10 yards.
Lichborne - Rank 1/1
Draw upon unholy energy to become undead for 10 sec. While undead, you are immune to Charm, Fear and Sleep effects.
On a Pale Horse - Rank 2/2
You become as hard to stop as death itself. The duration of movement-slowing effects used against you is reduced by 30%, and your mounted speed is increased by 20%. This does not stack with other movement speed increasing effects.
Endless Winter - Rank 2/2
Your Mind Freeze no longer costs runic power.
Chill of the Grave - Rank 2/2
Your Chains of Ice, Howling Blast, Icy Touch and Obliterate generate 10 additional runic power.
Killing Machine - Rank 3/3
Your melee attacks have a chance to make your next Icy Touch, Obliterate, or Frost Strike a guaranteed critical strike. Effect occurs more often than Killing Machine (Rank 2).
Rime - Rank 3/3
Your Obliterate has a 45% chance to cause your next Howling Blast or Icy Touch to consume no runes.
Pillar of Frost - Rank 1/1
Calls upon the power of Frost to increase the Death Knight's Strength by 20%. Icy crystals hang heavy upon the Death Knight's body, providing immunity against external movement such as knockbacks. Lasts 20 sec.
Improved Icy Talons - Rank 1/1
Increases the melee and ranged attack speed of all party and raid members within 100 yards by 10%, and your own attack speed by an additional 5%.
Brittle Bones - Rank 2/2
Your Strength is increased by 4% and your Frost Fever chills the bones of its victims, increasing their physical damage taken by 4%.
Chilblains - Rank 2/2
Victims of your Frost Fever disease are Chilled, reducing movement speed by 50% for 10 sec.
Hungering Cold - Rank 1/1
Purges the earth around the Death Knight of all heat. Enemies within 10 yards are trapped in ice, preventing them from performing any action for 10 sec and infecting them with Frost Fever. Enemies are considered Frozen, but any damage other than diseases will break the ice.
Improved Frost Presence - Rank 2/2
Increases your bonus damage while in Frost Presence by an additional 5%. In addition, while in Blood Presence or Unholy Presence, you retain 4% increased runic power generation from Frost Presence.
Might of the Frozen Wastes - Rank 3/3
When wielding a two-handed weapon, your autoattacks have a 45% chance to generate 10 Runic Power.
Howling Blast - Rank 1/1
Blast the target with a frigid wind dealing ((
/ 2) + (AP * 0.4)) Frost damage to all enemies within 10 yards.
Blood (3 Points)
Bladed Armor - Rank 3/3
Increases your attack power by 6 for every 180 armor value you have.
Unholy (7 Points)
Unholy Command - Rank 2/2
Reduces the cooldown of your Death Grip ability by 10 sec, and gives you a 100% chance to refresh its cooldown when dealing a killing blow to a target that grants experience or honor.
Virulence - Rank 3/3
Increases your chance to hit with your spells by 9%. Spells are all Death Knight abilities that are not direct weapon strikes.
Epidemic - Rank 2/3
Increases the duration of Blood Plague and Frost Fever by 8 sec.