siliconinsider usually does a great job. I have 4x4MB SIMMs from him in my SE/30 which work great! The SE/30 however is very picky about RAM. Did you install them correctly? What are the symptoms?
I‘d assume it‘s soldered. At least the same variation of the ‘030 was soldered in my SE/30. I believe the golden ones are socketed. Why do you want to remove it? Is it a battery bombed board?
If it‘s a SE/30, are you sure the RAM is compatible? I also had these stripes on mine despite known-good RAM. I tried different modules, and it booted..