ID Software Doom 3 1.3	Source: id Software

Doom 3 takes advantage of the latest videocard technology and pushes the processing power of the CPU to its absolute limit. At its highest setting, Ultra quality, texture sizes pass the 500MB mark which means even tomorrow's videocards will have a hard time running everything. The frame rates in the game itself are locked at 60 fps so anything above that point is wasted. Each test is run three times with the third run being recorded.

Doom 3
LQ 640x480	FPS	Ranking
512MB System Memory	144.6
512MB System Memory 512MB ReadyBoost	145.3
512MB System Memory 1GB ReadyBoost	147.6
512MB System Memory 2GB ReadyBoost	147.6
512MB System Memory 4GB ReadyBoost	147.6
1GB System Memory	168.3
1GB System Memory 1GB ReadyBoost	170.4
1GB System Memory 2GB ReadyBoost	170.5
1GB System Memory 4GB ReadyBoost	170.5
2GB System Memory	178.5
2GB System Memory 2GB ReadyBoost	178.5
2GB System Memory 4GB ReadyBoost	178.5
4GB System Memory	178.6
4GB System Memory 4GB ReadyBoost	178.6

ReadyBoost does boost overall framerates very slightly with the 512MB system RAM configuration, which is a surprise. I guess there's a bit of HDD access when running the Doom3 demo. In any case ReadyBoost does not make a significant impact here.

Sierra FEAR 1.08	Source: Sierra

FEAR is Sierra's latest first person shooter which relies heavily on DirectX 9 features. With its "Soft Shadows" feature enabled, even the fastest videocards run at a crawl, FEAR is definitely the new benchmark for future FPS games to follow.

FEAR
Minimum 640x480	FPS	Ranking
512MB System Memory	417
512MB System Memory 512MB ReadyBoost	427
512MB System Memory 1GB ReadyBoost	430
512MB System Memory 2GB ReadyBoost	430
512MB System Memory 4GB ReadyBoost	430
1GB System Memory	462
1GB System Memory 1GB ReadyBoost	465
1GB System Memory 2GB ReadyBoost	465
1GB System Memory 4GB ReadyBoost	465
2GB System Memory	497
2GB System Memory 2GB ReadyBoost	498
2GB System Memory 4GB ReadyBoost	498
4GB System Memory	502
4GB System Memory 4GB ReadyBoost	502

Again we see that with 512MB of memory installed, ReadyBoost does improve framerates slightly. When the system has 1GB or more of memory installed ReadyBoost has no impact at all.