Accelerated Graphics Port

AGP (tieng Anh: Accelerated Graphics Port)la mot bus truyen du lieu va khe cam danh rieng cho cac bo mach do hoa - Ngay nhu ten goi tieng Anh day du cua no da cho biet dieu nay (Tam dich: Cong tang toc do hoa).
Ngay nay (2007) giao tiep AGP khong con duoc su dung trong cac bo mach do hoa nua, chung duoc thay the bang chuan PCI Express X16.

AGP duoc phat trien tren nen bus PCI voi su thay doi ve dang thuc vat ly, cau tao va toi uu hon de danh rieng cho cac bo mach do hoa. Khong giong nhu cac khe cam PCI duoc thiet ke voi so luong nhieu tren bo mach chu, AGP chi duoc thiet ke mot khe duy nhat.
Trong cau truc may tinh, bus AGP duoc ket noi thang voi chip cau bac (Cai tien so voi bus PCI ket noi voi chip cau nam).
Do cau truc nay, AGP cho phep cac bo mach do hoa co the truy cap truc tiep vao bo nho cua he thong, dieu nay giup tang dang ke hieu nang tren cac bo mach do hoa so voi khi chung su dung bus PCI truoc do. Tuy nhien nhung bo mach do hoa nhung the he cuoi cung su dung giao tiep AGP it khi su dung bo nho he thong do chung thuong duoc trang bi san cac bo nho do hoa rieng.
Ngay nay bang thong cua bus PCI Express (X16) cao hon so voi AGP nen ngay nay cac bo mach do hoa da chuyen sang su dung bus nay, cac bo mach chu ngay nay cung khong con ho tro bus AGP. Nguoi su dung muon nang cap bo mach do hoa tren cac he thong co bo mach chu su dung cong giao tiep AGP hien nay con rat it lua chon va da so cac bo mach do hoa nay su dung cac GPU cu.

• Phien ban dau tien cua AGP la AGP 1.0 xuat hien vao nam 1996.
• Nam 1998, phien ban AGP 2.0 ra doi voi dien ap su dung 1,5 V. Bao gom cac loai AGP 4X.
• Phien ban AGP 3.0 ho tro 8X tang gap doi bang thong so voi AGP 4X.
• Phien ban AGP Pro 1.0 duoc ra doi thang 8 nam 1998; Cho den thang 4 nam 1999 thi chung phat trien thanh phien ban AGP Pro 1.1a.

AGP Pro su dung cac ranh cam dai hon va tang kha nang tieu thu cong suat tu 25W len 110W. Co tinh tuong thich nguoc: Cac bo mach su dung chuan AGP thong thuong co the cam vao cac ranh AGP Pro do do nhieu hang san xuat bo mach chu da su dung loai nay de co the cho phep su dung voi nhieu loai bo mach do hoa hon (tuy nhien cung cung cap cac phan phu kien de lap vao phan con lai cua cac ranh AGP Pro khi dung bo mach do hoa AGP thong thuong chung khong cam het day du vao ranh).

AGP Pro chi xuat hien trong cac may tram cao cap ma khong co o cac phien ban cho cac may tinh ca nhan pho thong do do chung it duoc biet den voi da so nguoi su dung.

Phan loai AGP theo bang thong bao gom:

1. AGP 1X Do rong bus: 32 bit; Tan so lam viec: 66 Mhz; So du lieu chuyen mot xung nhip: 1; Bang thong: 266 MBps
2. AGP 2X Do rong bus: 32 bit; Tan so lam viec: 66 Mhz; So du lieu chuyen mot xung nhip: 2; Bang thong: 533 MBps
3. AGP 4X Do rong bus: 32 bit; Tan so lam viec: 66 Mhz; So du lieu chuyen mot xung nhip: 4; Bang thong: 1066 MBps
4. AGP 8X Do rong bus: 32 bit; Tan so lam viec: 66 Mhz; So du lieu chuyen mot xung nhip: 8; Bang thong: 2133 MBps

Dien ap cua cac loai giao tiep AGP phan biet tuy thuoc vao tung loai. Voi AGP 1X, 2X, su dung dien ap 3,3 V. Voi AGP 4X, 8X su dung dien ap 1,5 V hoac thap hon (0,8 V).

Tuy thuoc vao su ho tro cac khe cam AGP khac nhau ma cac bo mach do hoa su dung giao tiep AGP khac nhau. Hinh minh hoa ben cho ta thay rang co nhieu loai khe cam va su phu hop doi voi chung. Thiet ke cac ranh tren bo mach do hoa va tren bo mach chu se giup cho nguoi su dung khong the co tinh cam lan gay nguy hiem den he thong chung.
Doi voi mot so bo mach do hoa cho phep su dung ca doi voi loai AGP 2X va AGP 4X/8X thi tai phan ket noi chung co ca hai ranh khuyet de co the tuong thich voi ca hai loai.

• Scott Mueller; Upgrading and Repairing Pcs, 17th Edition.

• PCI
• PCI Express
• Bo mach do hoa
• Bo mach chu

• So khai dien toan
• Card do hoa

• Tat ca bai viet so khai