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 Phenom 955 on ddr 1333, ram speed how

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antonio
post Aug 21 2009, 02:50 PM

AMD Phenom II & Intel i7 Overclocker
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From: MSR Headquaters
QUOTE(WhiteFlag @ Aug 21 2009, 12:14 PM)
hi all ,
1st of all i ask this in oc forum bcos i believe here got more experience dudes in ram speed bottleneck.

for phenom 955 which is on 200mhz x 16 = 3.2ghz, means tat the ram only run as 800mhz or 1600mhz,
so i wonder if i put it on ddr3 1333, will it be slower than a ddr2 800 ( as ddr3 latency higher)

so if there is any good solution to make phenom 955 runs good wif ddr3 1333 ram ?  rclxms.gif
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Ex:

X4 (4 Cores) 3000mhz (Per CPU Core) 1800mhz (CPU-NB) 1800 (Hyper Transport) 200Mhz (HTT) 1066Mhz (Ram)

Sandra Mem Bandwidth : 7000Mb
SuperPI :20 seconds

Or you can gain another 500mb or shave 1-2 seconds without the raise of CPU Clock Speed by;

-Raise CPU/NB up to 2400 using stock volts (1.1v)
-Raise Mem Speed to lets say 1200Mhz
-Raise HTT around 225

All three combo increases performance which can be seen in benchmarking tools... thumbup.gif

antonio
post Aug 21 2009, 03:49 PM

AMD Phenom II & Intel i7 Overclocker
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From: MSR Headquaters
QUOTE(WhiteFlag @ Aug 21 2009, 03:25 PM)
har?
then y when i increase the HTT speed, originally its 200mhz,when i increase the HTT the cpu clock and mem clock and HT link all increase as well?
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Yap...because it is linked all together via multplier...

Lets say 200HTT 1800 CPU/NB 1800 Hyper Transport;

when u raise 10HTT the CPU/NB and Hyper Transport also raise accordingly but is multiplied... 1HTT will be times 10 if u use 10 multiplier...if u use 12 then (HTT value will) multiply with 12.... thumbup.gif

Some reads the CPU/NB Frequency by multiplier and some by the speed...but both is actually the same thing...

When u put CPU/NB at 12, lets say u run 200HTT ur CPU/NB frequency will be operating at 2400mhz...if u use 10x multi, it will result to 2000mhz frequency speed...




 

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