Slow SSD write after OS install

[projectshave]

Benchmarked a new ssd with AS SSD and got the same results as published by reviews: 240MB/s sequential read and 220MB/s sequential write. However, after I copy my image to the drive all the write benchmarks are cut in half: 100MB/s seq. write. Read performance does not change. Is this expected? Can I improve write performance?

It's a Kingston V100 128GB. I copied a 90GB image from my old hdd. Alignment is good, has the latest firmware, tried both msahci and intel's rst driver. I also tried a fresh install of Win7 and got the same slow write perf.

Thanks.

 

[tecmo34]

How did you test the new drive originally??

When you did a fresh install, did you do a secure erase first before installing?

Can you post a screenshot of your AS SSD Benchmark??

 

[photonboy]

That's strange. You should see if there's a Community spot at the manufacture website that discusses this. If you can't find any details then contact the manufacturer.

Did you update the drive to the latest firmware?

 

[projectshave]

Hi, the SSD has the latest firmware. I've never done a secure erase. I've taken the following steps:
1) Fresh Win7 on SSD: slow writes
2) Old image on SSD: slow writes
3) Quick format of SSD: fast writes
4) Put image on again: slow writes

So I know the drive is *capable* of fast writes. Here's my slow benchmark:

When it was fast, it was equal to this benchmark site's numbers:

Kingston gave me an RMA #. But I'm not convined the drive is bad because it did deliver fast write performance once. I'm wondering if this is normal for SSDs?