What's wrong with my SSD?

[tatts]

I've been away from PC's for a years so i'm now rusty
Just got myself an i7 system but think the SSD may be duff? I was getting 31k bad errors so i've deleted the partition and started a fresh but it still doesn't look right? Drive is an intel x25m

 

[tatts]

Tried different sata lead and port with no improvement. The write speed starts around 50mb/s and slowly drops to single figures.
Can i do the secure erase via usb on my laptop? It's my OS drive in this pc.

Here are screenshots of intel ssd toolbox: