Image forming apparatus

An image forming apparatus to which a cartridge provided with a device including a memory is detachably mountable and in which an image is formed by using the cartridge mounted, the image forming apparatus comprising:

• a controller configured to execute image formation control for putting the image forming apparatus in a state in which the image forming apparatus is capable of forming the image based on image information;
• an acquiring portion configured to acquire first condition information which is image forming condition information including an operation setting of at least one of a charging unit, an exposure unit, a developing unit, a transfer unit, and a fixing unit from the memory in communication with the device;
• a verifying portion configured to verify the first condition information acquired from the memory;
• a second condition information storing portion in which second condition information which is image forming condition information including a corresponding operation setting is stored;
• and
• an authenticating portion configured to execute authentication processing for authenticating the cartridge in communication with the device,
• wherein the controller executes at least a part of the image formation control, using the first condition information or the second condition information selected on the basis of a verification result by the verifying portion, in parallel to the authentication processing by the authenticating portion, wherein execution of at least part of the image formation control is started after the first condition information is acquired and verified and before completion of the authentication processing such that at least a part of a period of the image formation control overlaps with at least a part of a period of the authentication processing.