View Full Version : Confused on Bus / RAM speeds

07-16-07, 01:34 PM
When the 22nd hits I plan on getting the Core 2 Duo 1333 @ 3.0 GHZ

The mother board I plan on using is the
EVGA 122-CK-NF66-T1 LGA 775 NVIDIA nForce 650i Ultra ATX Intel Motherboard (http://www.newegg.com/product/product.asp?item=N82E16813188017)
wich supports this speed.

The graphics card will be a
EVGA 640-P2-N821-AR GeForce 8800GTS 640MB 320-bit GDDR3 PCI Express x16 HDCP Video Card (http://www.newegg.com/product/product.asp?item=N82E16814130071)

I am confused on what speed memory would go best with this system. The total rig (minus monitor and speakers) needs to stay under $1,700

I am looking at
Patriot eXtreme Performance 1GB 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) (http://www.newegg.com/product/product.asp?item=N82E16820220142)
getting 4 sticks.
Capacity 1GB
Speed DDR2 800 (PC2 6400)
Cas Latency 4
Timing 4-4-4-12
Voltage 2.2V

Should I shoot for higher than PC2 6400? Also on the EVGA web site for supported memory for this board, it only lists 6400 as the fastest.

Forgot to mention why I was confused. I am hearing a lot about the 1:1 ratio being good for overclocks, wich is why I am asking if the 800mhz (1600 fsb) will be a good choice, what FSB do you think the new processors at 1333 will get to for normal stable OCs on air and what memory to go along with it.

Second Edit:
For $30 more total, I can change that memory to 2x2gb instead of 4x1gb. I don't upgrade often but at some point the 64bit version of windows will be good enough to upgrade too, and by not taking those 2 slots up I can get 8gb memory some day when I do get a 64bit os. Good idea, bad idea?

07-16-07, 10:14 PM
yah if someone could shed some light on the 1 to 1 thing with the ram and processor that would be really helpful. Cuz i really want to overclock my new q6600, but not sure which memory to go with.
(sorry to steal your topic :rolleyes: , just wanted to say you're not the only one that doesn't know)

07-16-07, 11:55 PM
800mhz memory (PC2 6400) will ensure that your computer's FSB can hit 1600mhz without causing any strain to the memory. The X6850 has a 9x multiplier, so it should be able to reach 3.6Ghz without too much trouble.

1:1 FSB/memory ratio basically says that the memory is half the speed of the FSB. 800mhz memory is plenty powerful to do this.

07-17-07, 12:02 AM
Its also worth noting that anything higher than 533Mhz ram for 1066Mhz FSB CPUs or 667Mhz ram for 1333Mhz FSB CPUs will do nothing unless you overclock your FSB.

If you buy 1066Mhz RAM for a 1066Mhz FSB CPU and arent overclocking, you just wasted a lot of money since your ram will be running at half its rated speed.

07-17-07, 12:18 AM
Well, not quite. I'm at stock speeds, but my ds3 appears to run the ddr2 @ 800, so there's an odd ratio for you.... but generally you are correct.

07-17-07, 12:50 AM
Well, not quite. I'm at stock speeds, but my ds3 appears to run the ddr2 @ 800, so there's an odd ratio for you.... but generally you are correct.
Yeah, but in that case you aren't running 1:1.

Depending on who you ask, your system might actually be faster and more stable by running your ram and FSB at the same speed to keep things in sync.

I know my system hated running DDR400 using any kind of dividers and it was very picky. When I got DDR500 I was able to run it 1:1 at any speed I wanted and I havent had any memory related issues.

If its working for you though, thats good.

07-17-07, 01:50 PM
Thank you all for the reply.