Nvidia released  a new GeForce driver This is a DirectX optimized driver, well CPU overhead lowering driver so to say. So make no mistake and do not confuse it with the DX12 release versus low-level API access. Nvidia listed a bunch of games in the driver release, all CPU limited titles. The driver should help out SLI users though, where CPU limitation is a more common thing.

We have a discussion thread open on this driver right here. 

In Multi GPU mode the performance increases as such should be more substantial. Here's an overview of what you may expect tomorrow with the driver release:

What’s New in Version 337.50

Performance 
Introduces key DirectX optimizations which result in reduced game-loading times and significant performance increases across a wide variety of games. Results will vary depending on your GPU and system configuration. Here are some examples of measured gains versus the previous 335.23 WHQL driver:

GeForce GTX 700 Series (Single GPU):

• Up to 64% in Total War: Rome II
• Up to 25% in The Elder Scrolls V: Skyrim
• Up to 23% in Sleeping Dogs
• Up to 21% in Star Swarm
• Up to 15% in Batman: Arkham Origins
• Up to 10% in Metro: Last Light
• Up to 8% in Hitman Absolution
• Up to 7% in Sniper Elite V2
• Up to 6% in Tomb Raider
• Up to 6% in F1 2013

GeForce GTX 700 Series (SLI):

• Up to 71% in Total War: Rome II
• Up to 53% in Sniper Elite V2
• Up to 45% in Aliens vs. Predator
• Up to 31% in Sleeping Dogs
• Up to 20% in CoD: Black Ops 2
• Up to 10% in Hitman Absolution
• Up to 9% in F1 2013
• Up to 7% in Far Cry 3
• Up to 6% in Metro: Last Light
• Up to 6% in Batman: Arkham Origins

SLI Technology:

• Total War: Rome II – added profile
• War Thunder – added profile
• Watch Dogs – updated profile
• Diablo III – updated profile

3D Vision
Supports new “3D Compatibility Mode” for 3D Vision that enables us to improve the 3D experience for many key DirectX 10 and 11 games

3D Vision Profiles

• Path of Exile – rated “Good”
• KickBeat – rating now “Excellent”

3D Compatibility Mode Profiles

• Assassin’s Creed Liberation – previously “Not Recommended”, now rated as “Excellent”
• Sniper Elite: Nazi Zombie Army – previously “Good”, now rated as “Excellent”
• Sniper Elite: Nazi Zombie Army 2 – previously “Good”, now rated as “Excellent
• Strike Suit Zero – previously “Not Recommended”, now rated as “Good”
• Watchdogs – rated as “Good”

Additional Details:
Installs new PhysX System Software 
Installs HD Audio 
Installs GeForce Experience 

DriverVer:

• Driver 337.50 is
• Driver 335.23 is r334_89-21, DriverVer = 03/04/2014, 9.18.13.3523
• Driver 334.95 is r334_89-2, DriverVer = 02/13/2014, 9.18.13.3495
• Driver 334.89 is r334_00-150, DriverVer = 02/08/2014, 9.18.13.3489
• Driver 334.67 is r334_00-113, DriverVer = 01/15/2014, 9.18.13.3467
• Driver 332.21 is r331_82-6, DriverVer = 12/19/2013, 9.18.13.3221