Crucial M4 SSD write speeds sub par

It looks fine for the 64GB model.

Verify that your drive is connected to port SATA3_0 or SATA3_1, not GSATA3_5 or GSATA3_6.

MSAHCI is Microsoft's default AHCI driver. Use Intel's latest RST driver.

Best answer selected by rcfant89.

Thanks, I downloaded the intel driver and my performance went up a bit but, it was mainly a read speed increase.

My write speeds are very similar to yours but my write speeds (seq and 4k-64Thrd) are less than half yours. Sure a larger SSD might be a little faster but no way it's twice as fast to write, no?

Part of this could be that you have recently run the benchmark. The benchmark, for comparision, should be done on a Clean SSD shorly after installing OS. Repeated Runs will show lower performance.

One consolation, Sequencial read/write performance is the least important followed by the 4K-64 Values (very few uses use more than 3 -> 5, so 64 is not a realistic value).

Reads are generally more important than writes also for Loading the operating system and loading a program. With a 60/64 Gig SSds alot of the "writes" are set to the HDD any ways.

It's a shame that most reviews limit the review to the larger SSDs often the 240/256 Gig drives and some for the 120/128 gig drives, but very few post the AS SSD scores for the Sub 120 gig SSDs.

Probably for marketing purposes. Manufacturers submit their best drives for high reviews.  

You are correct. That is also why they generally post Sequencial read/write performa using Compressable data.