RM-1027 which was earlier revealed to be in the first bunch of Windows Phone 8.1 devices has now appeared on GFXBench. The device has WVGA display as is confirmed by the 800×480 resolution and will run on Adreno 305, the standard GPU configuration for low-end Lumia devices.
We earlier guessed it to be the Lumia 530, as it is the only rumored device which has not been released. The kind of specs the benchmarking entry reveals makes it more probable now. May be Microsoft is planning to bring Lumia 530 out soon.