What's the directx of the model with code name RV770 PRO and a core bigger than 650.0 MHz?
CREATE TABLE table_19161046_1 (
    directx VARCHAR,
    code_name VARCHAR,
    core___mhz__ VARCHAR
)
SELECT directx FROM table_19161046_1 WHERE code_name = "RV770 PRO" AND core___mhz__ > 650.0
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What's the directx of the model with code name RV770 PRO and a core bigger than 650.0 MHz? ### Input: CREATE TABLE table_19161046_1 (
    directx VARCHAR,
    code_name VARCHAR,
    core___mhz__ VARCHAR
) ### Response: SELECT directx FROM table_19161046_1 WHERE code_name = "RV770 PRO" AND core___mhz__ > 650.0