Did I overclock my mem?!?

[catdug]

Okay, I was exploring around in my bios, and I noticed that, in the "frequency/voltage control settings" my PC2700 memory was showing this setting: "DDR Speed (strobe/sec.).......266M". Now, I'm running everything on stock(no overclock) settings. My fsb is 133 and my cpu ratio is 11.5, which is correct for my XP1800+ proc. But my "DDR: CPU Ratio" is [2.00X] which makes my "DDR Speed (Strobe/Sec.)" show 266M. (133x2=266). So, I changed my ratio to the only other choice which was [2.50X] and now it is showing my "DDR Speed (Strobe/Sec.)" at 333M. (133x2.5=332.5). Is this now the correct setting? Is this the same thing as 333mhtz. that goes along with having PC2700 ram or is this something else altogether? Did I inadvertently overclock my Samsung memory? Why didn't my bios automatically set this to 2.50X by default? Please refer to my sig for my config. Please excuse my ignorance. Thanks.

[Wiggo]

PC2700 = DDR333 = 166MHz

[homeworld1031tx]

since ur only running on a 266 MHz FSB ur CPU wont be able to talk to the memory any faster, so it really doesnt make a difference, according to an AMD press release i read a while ago. i if u run at 33 and want to see and improvment in speed, oc ur FSB to 166 and if u want to be safe downgrade ur multiplier(its not called a ratio) to where u get a 1.53 GHz speed. thats when u will see the preformance jump.

[Suicide]

I'd just let it run at 266mhz and set your timings a little agressively (that is, unless you wanna overclock... then your ram might not take lightly to agressive memory timings at it's rated clock frequency or above).

[catdug]

I don't really want to overclock anything at this time. Am I overclocking with the setting at [2.50]? Did I waste my money by buying PC2700 ram if I'm not gonna overclock? Everything is running perfectly stable at these current settings. I did notice about a 200-300 mark increase in my score in 3dmark2001SE after I went from [2.00] to the [2.50]. :cool: Thanks for your replies.

[catdug]

if u want to be safe downgrade ur multiplier(its not called a ratio) to where u get a 1.53 GHz speed. thats when u will see the preformance jump.

I'm just quoting what my bios says when it called it a "ratio".

[Wiggo]

Your BIOS certainly has some strange settings and wordings but ya didn't overclock anything and in a single channel memory setup runnin' at +33MHz to the FSB is quiet fine (dual channel is where no advantage is forth comin') so ya have nothing to worry about as ya have it set proper.

[catdug]

So, would I have been just as well off if I had saved a few $$$ and bought the pc2100 ram instead of the pc2700 with my current config?:confused:

[homeworld1031tx]

well u get the extra 600 MG's of bandwidth, which can really make about a 5 fps difference on games like UT2K3, but yeah, u could have

[homeworld1031tx]

i wouldny suggest running at 166 MHz FSB unless u have nforce2 of kt400 mobo (w/ exception of the kt33CF) they dont suppport it, and if u dont fell safe with oc'ing, then u could run into some risks. 145 MHz should be a safe OC for kt266/333 boards.

[Wiggo]

I give up as ppl here obviously can't read. : omg:

[tukinnam]

...in a single channel memory setup runnin' at +33MHz to the FSB is quiet fine (dual channel is where no advantage is forth comin') ..

did u mean that dual channel does not profit from OCing the mem?

[Wiggo]

No only that the dual memory controllers don't benefit by runnin' the memory faster than the FSB as it already has twice the memory bandwidth where as the single memory channel chipsets will.

[catdug]

Thanks everyone, you've been a lotta help. I love this place!:thumb:

[jamie_horwood]

i am currently pondering resolutions as to the cause of wrongly detected memory speeds in windows when set in bios to +166mhz optimal. here are my settings:


AGP fast write capability - (enabled)CPU external clock frequency - (133mhz) CPU frequency multiple frequency - (133mhz) [size=2]CPU frequency multiple SIZE] CPU interface - (Optimal) Memory frequency - (By SPD) Resulting frequency - (166mhz) Memory timings - (optimal) SDRAM active precharge delay - (7) SDRAM ras to cas delay - 3 SDRAM ras precharge delay - (7) SDRAM cas latency (2.5T) FSB spectrum (disabled) AGP spread spectrum (disabled) CPU vcore setting (auto) Graphics aperture size - (128mb) AGP frequency - (auto) System bios cacheable - (enabled) Video ram cacheable - (enabled) DDR reference voltage - (2.6v) AGP vddq voltage - (1.5v) AGP 8X support - (enabled) [size=2]AGP fast write capability - (enabled)CPU external clock frequency - (133mhz) CPU frequency multiple SIZE] CPU interface - (Optimal) Memory frequency - (By SPD) Resulting frequency - (166mhz) Memory timings - (optimal) [size=2]SDRAM active precharge delay - (7) CPU external clock frequency - (133mhz)