Cach chon mua may tinh xach tay Phan II
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Kich thuoc va trong luong: Laptop co nhieu kich thuoc va hinh dang. Trong luong may tu 1 den 4,5 kg, trong luong tong cong (ca cac phu kien bo sung nhu nan dong va o dia ngoai) thuong cao hon tu 230 - 450 gram.
Man hinh: Co rat nhieu lua chon. Cac man hinh thuong rong tu 10 - 17 inch (theo duong cheo) va co toi 6 do phan giai khac nhau. Nhung man hinh rong, kich thuoc 15 – 17 inch dang tro nen pho bien voi nguoi tieu dung vi chung tuong thich voi do phan giai cua phim DVD. Man hinh 15 inch dang nhanh chong the cho cua man hinh 14 inch, tro thanh xu the chu dao tren thi truong.
Do phan giai man hinh la mot nhan to quan trong khac. Do phan giai cang cao, hinh anh cang sac net. Nhung man hinh nho (12,1 inch) thuong su dung do phan giai XGA (1.024 x 768 pixel). Nhung man hinh lon hon (15 hoac 16 inch) su dung do phan giai (SXGA+ (1.400 x 1.050 pixel) va mot so it su dung do phan giai UXGA (1.600 x 1.200 pixel). Cac loai man hinh rong thuong dung WXGA (1.440 x 900 pixel) hoac WUXGA (1.920 x 1.200 pixel).
Toc do bo vi xu ly: May tinh xach tay thuong duoc trang bi cac bo vi xu ly AMD, Intel hoac Transmeta, nhung khong phai tat ca bo vi xu ly deu duoc thiet ke cho laptop. Intel san xuat rat nhieu loai chip danh cho may xach tay, loai vi xu ly cao cap nhat la mau Pentium M moi ra mat duoc 1 nam nay. Du toc do xung nhip (clock speed) noi chung co ve cham, tu 1,4 - 1,7 GHz, nhung nhung CPU Pentium M manh nhat co nang luc tinh toan tuong duong voi may de ban, tu 2,6 - 3,0 GHz, nho thiet ke rieng cho moi truong di dong.
Loai chip Pentium M chia lam 2 dong: dien the thap (LV) va dien the cuc thap (ULV). Khi ket hop Pentium M voi bo chipset Intel va mot module khong day, ta co cong nghe Centrino. Khoang giua nam nay, mot ban nang cap cua Pentium M (ma hieu Dothan) se tang dung luong cache L2 len 2MB, gap doi so voi hien nay.
Bo vi xu ly “xua” hon, Mobile Intel Pentium III Processor-M, hien van con tren thi truong. Mac du duoc thiet ke dac biet cho may tinh xach tay, no chi tuong duong voi the he Pentium III cua may tinh de ban. PIII-M co toc do tu 800 MHz toi 1,33 GHz nhung kha nang xu ly khong the sanh bang Pentium M co cung toc do xung nhip.
AMD, doi thu canh tranh lon nhat cua Intel, co bo vi xu ly nhanh nhat danh cho may tinh xach tay, Mobile AMD Athlon 64. Loai chip nay tham chi se the hien nang luc tinh toan vuot troi hon nua khi phien ban 64 bit cua Windows va cac ung dung 64 bit khac duoc tung ra thi truong. Nhung loai chip 32 bit khac cua AMD danh cho laptop cung kha pho bien tren thi truong, bao gom Mobile AMD Athlon XP-M va loai cu hon, khong con duoc san xuat nua la Mobile AMD Athlon 4.
Mot nha san xuat nho, Transmeta, gan day gioi thieu chip Efficeon CPU, duoc thiet ke nham tang cuong toi da hieu suat cua may tinh xach tay.
Con nua
BINH NGUYEN - THUY MINH
