am2 ddr2 dividers

[Warship]

"HTT - 267
HTTx - 4
HTTv - 1.3
CPUm - 9
CPUv - 1.45
RAM - /7 (533)
RAMv - 2.1
RAM - 4.5.4.12 2T"

Drop your HTT-multi to x3 and raise that HTT-freq.

[OCZSpeedJunky]

A little more info for guys working with the new AM2 CPU's. Here is the default/stock Memory Divisors, CPU Multipliers, & L2 Cache listed per chip for all the Athlon64 currently out:

Single Core Orleans (all 512KB L2 Cache)
1.8ghz, 3000+ CPU Multi x 9 / Memory Divisor 5
2.0ghz, 3200+ CPU Multi x 10 / Memory Divisor 5
2.2ghz, 3500+ CPU Mutli x 11 / Memory Divisor 6
2.4ghz, 3800+ CPU Multi x 12 / Memory Divisor 6

Dual Core X2 Windsor
2.0ghz, X2 3800+ CPU Multi x 10 / Memory Divisor 5 *L2 Cache - 512KB x 2
2.0ghz, X2 4000+ CPU Multi x 10 / Memory Divisor 5 *L2 Cache - 1MB x 2
2.2ghz, X2 4200+ CPU Multi x 11 / Memory Divisor 6 *L2 Cache - 512KB x 2
2.2ghz, X2 4400+ CPU Multi x 11 / Memory Divisor 6 *L2 Cache - 1MB x 2
2.4ghz, X2 4600+ CPU Multi x 12 / Memory Divisor 6 *L2 Cache - 512KB x 2
2.4ghz, X2 4800+ CPU Multi x 12 / Memory Divisor 6 *L2 Cache - 1MB x 2
2.6ghz, X2 5000+ CPU Multi x 13 / Memory Divisor 7 *L2 Cache - 512KB x 2
2.6ghz, X2 5200+ CPU Multi x 13 / Memory Divisor 7 *L2 Cache - 1MB x 2

Dual Core FX-62 Windsor
2.8ghz, CPU Multi Unlocked up too x 25 / Memory Divisor 7 *L2 Cache - 1MB x 2

Generally, if you are running the CPU at default stock multi/speed, take the default CPU clock speed, and simply divide it by the Memory Divisor, that will give you the stock speed when using the DDR2-800mhz divider. Example, take the Orleans 3000+ for instance, which default is at 1800mhz(1.8ghz) stock. To find the speed at which your DDR2-800+ will be running at, it's as follows:

example:
200mhz FSB x 9 CPU multi = 1800mhz effective CPU clock speed
1800mhz / 5 Memory Divisor = 360mhz
360mhz X 2 = 720mhz *what DDR2-800/900/1000/1066/1100+ will run at stock w/ a 3000+ CPU at stock/default FSB/CPU multi

All the CPU's which have a default "odd numbered" multiplier will run DDR2-800 below stock/spec speeds. That includes anything that runs above 800mhz also, such as DDR2-900/1000/1066/1100, etc. All the CPU's with "even numbered" multpliers will run at DDR2-800 stock. It's an annoying issue with all the chips that come with a "odd numbered" multi's. So you MUST overclock the "odd multi" CPU's to get your DDR2-800/900/etc. to stock speed. As far as other speeds, 667mhz, 533mhz, knacky's tables above are a great idea to use. Nice work knacky. :thumbsup:
Hope this helps a few people understand more along with knacky's tables above on how the new AM2 Memory Divisors work.

OCZ

[GFreeman]

Righto, imagine that I have a 4800+ Brisbane cpu.. which come with a half multi (12,5).. not sure if the same formula goes for that too?

So let's say i'm using the DDR800 devider.

We have 200htt x 12,5 (cpu multiplier) = 2500 Mhz
2500 /5 = 500 Mhz x 2 = 1000Mhz on my modules... correct?

[ozzimark]

ceiling ( 12.5 / (2/1) ) = ceiling ( 6.25 ) = cpu/7