Why would anybody buy a 3200 90nm over a 3000 90nm?

[GuitarDaddy]

Originally posted by: modalone
StriderGT
I have DDR500(PC4000 HyperX) and haven't been able to realize anything over 220MHz fsb. I was hoping that I could run the system at 250MHz FSB with 1:1 ratio.

Are you droping the HTT multi to 4x?
Increasing CPU and DDR voltage as you increase FSB?
What CPU? Generally the higher the rated speed, the less you can O/C. ie.. don't expect a 30% o/c on a FX55!
Are you droping the CPU multi? Most CPU's won't run 250mhz with the max multi (except the 3000, or the 3200 if your lucky) My 3200 won't run 250 x 10.

 

[modalone]

I didn't lower the HTT to 4X should I? It's still at 5X.
Currently, I am running the CPU with 1.525V (although it comes out a little less that 1.5V) and the memory at 2.7V. I'm using a 90nm 3000+.

Dropping the CPU multipiler?

 

[modalone]

thanks GuitarDaddy. 🙂 Cool! I forgot about the HTT multiplier. The HTT rate is the FSB frequency times the multiplier?

-Ratio 1:1
-FSB 250MHz
-4X Multipiler

 

[modalone]

I reflashed the bios and now for some reason I can't change the HT..

 

[StriderGT]

Originally posted by: StriderGT
HALF A64 CPU MULTIPLIERS (8.5x,9.5x etc) DO EXIST AND ARE FUNCTIONAL EVEN IF UNDOCUMENTED BY AMD.
There is no diagnostic application (including CPU-Z, Core Center, RM-Clock etc) at the moment that reports CORRECTLY the MEMORY DIVIDERS (200, 166, 133, etc) that result from the use of HALF CPU MULTIPLIERS. OCA64 is going to become the first one to do such calculations providing THE REAL Operating Memory Frequencies...

PS1 MSI Core Center does not even recognize HALF CPU multipliers, let alone calculate the resulting MEMORY DIVIDERS misreporting everything...
PS2 CPU-Z and ClockGen misreport the MEMORY DIVIDER and as a result they misreport the OPERATING MEMORY FREQUENCY of an A64 running with a HALF CPU MULTIPLIER...
PS3 Although there are HALF CPU MULTIPLIERS there are no HALF MEMORY DIVIDERS

Zebo I strongly suspect that Toms Hardware was using CPU-Z or a similar tool and failed to identify that the reason for the reduced memory bandwidth observed was the even lower memory frequency that HALF CPU MULTIPLIERS incur due to the MEMORY DIVIDER calculation methodology.

EXAMPLE:

8.5x CPU multi, 1:1 Memory, 248Mhz FSB=HTT, Memory Freq = 234Mhz (divider 9)
Mem Freq is NOT 248 reported by CPU-Z and Clockgen (divider 8.5)

I am 100% positive about this because my memory maxes at 233-234 (3D mark 2003 crash)...

Stay tuned for OCA64 v1.2

UPDATE: More Detailed Info on CPU-Z 1.26
CPU-Z misreports the memory speed when you use a half CPU multiplier (8.5x, 7.5x etc) AND the 1:1 ratio (memclock 200)
In this case it reports your memory frequency wrong, because there is no half memory divider(whenever you see such a thing in CPU-Z its a misreport)
I checked half CPU multipliers AND 166, 133, 100 memclock ratios and in these cases everything is ok in CPU-Z.
Current versions of all other diagnostic programs have much more misreport issues!

OCA64 v1.22 is online (link below)