Looking at Cpu-Z in the memory section, what's FSB:DRAM means? :?
I got 1:1 with 800fsb and 400mhz mem.
200MHz quad pumped to 800 CPU
200MHz double data rate 400MHz memory
It's the FSB to memory ratio.
http://www.obm.co.nz/OBMNew/800x600/guides/ddrram.htmQuote:Memory Clock (100/ 133/ 166/ 200 MHz) (DRAM Clock) (1:1 DRAM:FSB)
Specifies the clock speed of the memory bus. This rate is normally specified relative to the front-side bus (FSB) clock. DDR technology (double-data rate) doubles the data rate given by the actual bus clock speed.
Note: On AMD XP systems, often the best results are obtained with a 1:1 ratio with your FSB frequency. eg. CPU FSB 166Mhz(333):Ram clock 166Mhz (pc 2700 ram). Running a faster memory clock speed than your FSB speed can reduce performance. Instead, you'll probably get better results from optimizing the timing parameters. Use a Memory Diagnostic or Benchmarking application to find the best solution for your system.
the FSB:DRAM is the speed divider between the FSB and DRAM so they work at a ratio of 12:5 in your case so if to make things simple, your FSB is at 120MHz, your memory should be running at 50MHz(thuugh I hope this isn't the case). On my computer it is 1:1 because my FSB is at 1066 MHz and my memory is also at 1066 MHz. This ratio is used mostly for overclocking either your memory or cpu in the bios and you know that the other is going to hold you back i.e. your 400MHz memory on a divider of 1:1 will blow up if my computer tries to run it with my CPU FSB at 1066, so I would set the divider to something like 1:3 so my CPU runs at 1066MHz and my memory runs at 355 MHZ just as a simple example.
950 to 237.5 IS a 1:1 ratio. 237.5 would be DDR475, in dual channel it would have the same bandwidth as your 950 CPU bus.
Your CPU is running on a 237.5 x4 data rate, your RAM is running at 237.5 x2 data rate, so they're both at the same frequency, and dual channel mode makes up the difference between the x4 and x2 data rate.
You're golden, try to find the lowest possible timings at your current frequencies.
Cool..thanks for the info. Anyways at stock settings the ram is suppos to be 3-3-3-8-11 2T and at 400 automatically adjusted to 3-3-3-5-10 2T. I don not know if I could go any lower than 3 or I don't know what's the best timing. I don't even know what's this numbers exactly mean but for one thing I know its' better to have the lowest ones.
Right now it's 3-3-3-5-10 2T, so which one should I change the 3's or the 5 or the 10? I'll give it a shot...
From what I've know with Intel 4x512 Mb ram can only be stable at 2T. I tried is several times with normal voltage of 1.8 at 1T and I get crashes. If you could help me run my rams at 1T that would be awesome and how much performce is that from the 2T?
Anyways I have not manage to tighten the timings but I've increase the ram frequency from 400 to 450.
The new settings:
Core speed: 3800Mhz
Bus Speed: 950.0Mhz
Timings: 3-3-3-6-12 2T
Is this a good improvement from my last settings?