How Does Storage Performance Affect Gaming?
|I/O Pattern on SSDs||Game Startup||Level Loading||Gameplay|
|Read/Write Balance||Nearly all reads||Nearly all writes|
|Seek Distance||This varies, depending on the gameCrysis 2: SequentialWoW: RandomCivilization V: Sequential||Nearly all sequential|
|Transfer Sizes||This varies, depending on the game||A majority are 128 KB|
|Queue Depths||Almost completely queued one-deep||Mostly queued one-deep, but this also varies with gameUp to 50% of ops queued two- to eight-deep|
There’s a lot going on when you play a game. So, generalizing about the way storage technology affects gaming ignores many of the nuances that affect how long it takes to fire up a game, load a level, or even just play through it.
Granted, simply replacing a hard drive with an SSD won't address all of your performance-oriented issues in one fell swoop. It's often the case that one subsystem is waiting on another, which in turn is waiting on something else. That's why it might take almost a minute to load a level in Crysis 2, even if the drive is busy for fewer than three seconds. Responsiveness also affects how commands stack up. When we run these same games on a hard drive, a majority of the accesses occur at queue depths between two and 64.
As a practical matter, you don't spend much time waiting for a game or level to load, which is why the gameplay itself should be your highest priority. And we've seen the consequences of stuttering gameplay on a system limited to magnetic storage.
As with most performance comparisons we draw, just because you see SSD A beat SSD B by 50% in a synthetic benchmark doesn't mean it'll load a game or level 50% faster, too. With that said, based on the results we generated today, it's pretty clear that an SSD can help speed up certain aspects of your gaming experience.
More than anything, we wanted to make some correlations between the often-dry storage benchmarks you see in most drive reviews and real-world gaming. Those terms, numbers, and graphs do mean something; hopefully now you have a better understanding of how they relate. Take our explanations of how each specification affects your favorite title and use the data in our reviews to draw your own conclusions about which SSD is best for you.
Or, if you'd like to see more games dissected like this, feel free to let us know in the comments section.
Longer loading times are not crucial when all you want is to frag your enemies!
Doesn't this reduce the life of a SSD?
I'd like to see how the witcher stacks up with SSD. You are constantly having to load different areas the entire game so I made sure to have that on the SSD while playing it hoping to reduce the load times. Would like to see if that really paid off or not.
Does that mean if you had an infinitely fast disk, the level loading would take 56s? In which case, where is the bottleneck for level loading? Is it CPU bound? (if so, why isn't CPU usage at 100% when loading a level?) Memory? Graphics card?