Umehluko phakathi kwe-DDR4 ne-DDR5 RAM usejubaneni namandla
Ngokusho kwe-JEDEC, isizukulwane esilandelayo se-DDR5 inkumbulo yokufinyelela okungahleliwe (RAM) izoshesha ngokuphindwe kabili kune-DDR4 RAM yamanje lapho ikhishwa.
I-JEDEC imemezele ukuthi izophothula amazinga e-DDR5 ngesinye isikhathi ngo-2018, futhi inhlangano ithi i-DDR5 izophinda kabili umkhawulokudonsa kanye nokuminyana ngaphezu kwe-DDR4, futhi izoza nokwenyuka kokusebenza kahle kwamandla.
Yize izinga lizoba ngokusemthethweni ngonyaka ozayo, isizukulwane esisha ngeke silungele abakhiqizi kuze kube semva kuka-2020.
Kuyaphawuleka ukuthi izinga le-DDR4 laphothulwa ngo-2012, kodwa kwaze kwaba ngu-2015, lapho ama-processor nama-SoCs kufanele abuyekezwe ukuze alisekele.
Yini i-DDR5
I-GDDR5 (Dual Graphics Data Rate Version 5) I-SDRAM iwuhlobo lwekhadi lemifanekiso le-DRAM elisebenza kahle eliklanyelwe izinhlelo zokusebenza zekhompyutha ezinomkhawulokudonsa ophezulu.
Njengowandulelayo, i-GDDR4, isuselwe ku-GDDR5 SDRAM DDR3 enemigqa yedatha kabili kune-DDR2 SDRAM, kodwa futhi iqukethe i-GDDR5 yamabhafa ayi-8-bit abanzi afana ne-GDDR4. I-GDDR5 SGRAM ithobelana namazinga ashiwo ekucacisweni kwe-GDDR5 yi-JEDEC. Isebenzisa isixhumi esibonakalayo sesakhiwo se-DDR 8N se-architecture sokusebenza okuphezulu nokusebenza okungalungiselelwa ukusebenza ngemodi engu-32 x noma engu-16 x (i-clamshell) etholwe phakathi nokuqaliswa kwedivayisi. I-GDDR5 2 transport interface inegama lewashi elingu-32-bit ngomjikelezo ngamunye (WCK) lokubhala kwedatha ukuya/kusuka kumaphini we-I/O. Ukufinyelela okuhambisanayo kuqukethe i- -8N prefetch,
Noma bhala noma ufunde, kusukela kumjikelezo wokudlulisa idatha we-CK 2 ngewashi elibanzi elingu-256-bit. Umongo wememori yangaphakathi uqukethe ukudluliswa kwedatha eyisishiyagalombili ye-WCK kumjikelezo oyingxenye ohambisana nobubanzi obungu-32-bit kumaphini we-I/O.
Umehluko phakathi kwe-DDR4 ne-DDR5
I-GDDR5 isebenza ngohlobo oluhlukile lwewashi. Umyalo womehluko wewashi (CK) njengereferensi yekheli nokokufaka komyalo, bhala umehluko wewashi (WCK) njengereferensi efunda futhi ebhalayo. Ukunemba kakhudlwana, okuhlosiwe kwamawashi e-SGRAM GDDR5, ngalinye lisethelwe kumabhayithi amabili.
I-WCK isebenza ngokuphindwe kabili kwe-CK. Uma sithatha i-GDDR5 enezinga ledatha engu-5 Gbit/s ngephinikhodi ngayinye njengesibonelo, iwashi le-CK lisebenza no-1.25 GHz kanye ne-WCK eno-2.5 GHz.
Amawashi e-CK nawe-WCK azoqondaniswa phakathi nokuqaliswa nokuqeqeshwa kokulandelana. Lokhu kuhambisana kwenza ukufunda nokubhala kube ne-latency encane. I-Single 32-bit GDDR5 kanye Nephinikhodi, izinhlelo zethu zokusebenza ziye zabonisa futhi zathatha isampula ye-GDDR5, futhi zabonisa iphepha ngobuchwepheshe obungemuva kwe-GDDR5.
. NgoMeyi 10, 2008, uKimunda wamemezela amavolumu okukhiqiza angama-512 GDDR5 amamojula alinganiselwe ku-3.6 Gbit/s (900 MHz), 4.0 Gbit/s (1 GHz), kanye no-4.5 Gbit/s (1.125 GHz). Ukuze uthole ulwazi olwengeziwe, vakashela I-Wikipedia
