Abnormally slow 4k read/writes. Normal?

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pauliwago

n00b
Joined
Mar 29, 2011
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2
Hey guys,
Recently got the Kingston ssdnow v+100 series. I've noticed 4k read/write benchmarks scores are extremely low, especially when compared to numbers the drive is capable of.
kingstonv100.jpg

My mobo uses the AMD SB710 chipset. I've done the tests before and after applying various Windows 7 tweaks with consistent results. AHCI and Trim is on...I've tried it with default Microsoft drivers and AMD ones, same results.

One thing in particular: while testing, the write speeds of both the 4k's seem really inconsistent (jumps around a lot especially in the beginning anywhere from 0.4mb/s~110mb/s)

Is this normal? Is it my mobo's fault? Or is it an ssd defect?

Thanks guys.
 
ur benching the same drive ur OS resides on which means the bench does not have exclusive access to the drive to establish performance.
when benchmarking like this, test the drive outside of the OS environ. note, the v+100 doesn't have crazy high 4k scores to start with, hardly a big deal tho as long as u feel the experience is faster!
 
You didn't mention that you were absolutely certain you were correctly aligned. Even if you weren't, I suppose read scores shouldn't suffer like that.

Do the SMART tables indicate any problems?
 
You didn't mention that you were absolutely certain you were correctly aligned.
Click to expand...
That green color with an "OK" on the AS-SSD score is a pretty good indication that the drive is aligned.

You can count on it. :)

OP, your drive was a dog when you bought it and it hasn't changed. ;)

Even though the AMD chipset is slower than Intel it wouldn't make a noticeable difference.

Ya get what ya pay for.

Sorry.
 
thanks for your replies guys. all i wanted to know was whether my drive's defective and looks like it's not. don't want to have to deal with loading windows on it and then having to RMA it. so thanks again, it's a relief to know its working in full order :)
 
Kingston SSDs used alot of JMicron SSD controllers; these are pretty low-end controllers. The sequential I/O is good but random I/O suffers. It is still faster than a mechanical HDD though, but not by that much.

A very modern SSD can do 200 - 500MB/s of multiqueue random read I/O. That said, having 10MB/s 4K reads is already much better than just 1MB/s on HDD.
 
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