Overclocking RAM + FSB:DRAM?

[momosmokey]

I've been trying to pull the most out of my 1600Mhz Patriot G Series 'sector 5' 4Gb DDR3 RAM by overclocking, and I need some help. I've gotten them to 8-8-8-20 with a slight voltage boost; now I've become sucked into FSB:DRAM ratios, I can't really find anything about it on the web besides 1:1 ratios, which appear to apply to DDR2. I had a FSB:DRAM ratio of 4:20, then I upped my CPU Ratio (BUS speed) to 200Mhz (from 160 OC'd) and changed my RAM DRAM freq .(is it the RAM multiplier?) to 4 (from 5) to stay at 1600Mhz instead of 1800Mhz, now I'm running at 4:16. Maybe some CPU-Z pictures, will make more sense (below). I'm mainly asking for some help regarding FSB:DRAM and general overclocking, thanks.

 

 

[momosmokey]

Anyone?

[Locutus]

Be patient. :3

 

I honestly have no idea. o.o

[Alexandre]

Pretty sure the FSB: DRAM Frequency is the same as: FSB/[(Real) DRAM Frequency] = 4/16

(by "Real" I mean half the rated DRAM Frequency due to Double Data Rate memory)

 

This would mean that:

 

FSB = 4/16 * (Real) DRAM Frequency

= 1/4 * 800 MHz

= 200MHz

 

Which is your current FSB or Bus Speed in that screen shot.

Edited March 2, 2011 by Alexandre

[momosmokey]

The FSB is 200Mhz, that makes sense Alexandre, thanks. Should I use a 4:16 (1:4) FSB:DRAM ratio instead of a 4:20 (1:5) FSB:DRAM ratio? Or does it really matter? I've changed my settings, I'm now running a FSB of 170Mhz, RAM is 1700Mhz (853Mhz) 8-8-8-20, CPU is 3.4Ghz with a multiplier of 20. I ran 20 tests of Intel Burn Test on maximum and 7 hours of Prime 95 blender, not even a shudder. I love overclocking, can't wait till I have my GPU and can really see how this thing preforms.

 

Here's a new pic of CPU-Z with the newest settings:

Edited March 2, 2011 by xxmastermushxx

[Alexandre]

The FSB is 200Mhz, that makes sense Alexandre, thanks. Should I use a 4:16 (1:4) FSB:DRAM ratio instead of a 4:20 (1:5) FSB:DRAM ratio? Or does it really matter? I've changed my settings, I'm now running a FSB of 170Mhz, RAM is 1700Mhz (853Mhz) 8-8-8-20, CPU is 3.4Ghz with a multiplier of 20. I ran 20 tests of Intel Burn Test on maximum and 7 hours of Prime 95 blender, not even a shudder. I love overclocking, can't wait till I have my GPU and can really see how this thing preforms.

 

Here's a new pic of CPU-Z with the newest settings:

The 4:20 ratio just has a higher DRAM Frequency overclock to the 4:16 ratio. You got some really nice memory there! Getting some good clocks on those sticks with tight timings I'm liking your build more and more!

 

Glad you are enjoying overclocking! It's addictive.

Just remember that you are lowering the life expectancy of your computer by overclocking it - so don't go too crazy lol.

[momosmokey]

I'm done with overclocking the RAM, I just wanted to them at 8-8-8-20. While this OC will shorten their life-span, by then new RAM will be out and lets face it, RAM is a lot cheaper than a good CPU.

 

I'm sort of confused by your response: "The 4:20 ratio just has a higher DRAM Frequency overclock to the 4:16 ratio." Are you suggesting that I OC to the 4:16 or that 4:20 is just a higher DRAM frequency of 4:16?

Thanks

[Alexandre]

I'm done with overclocking the RAM, I just wanted to them at 8-8-8-20. While this OC will shorten their life-span, by then new RAM will be out and lets face it, RAM is a lot cheaper than a good CPU.

 

I'm sort of confused by your response: "The 4:20 ratio just has a higher DRAM Frequency overclock to the 4:16 ratio." Are you suggesting that I OC to the 4:16 or that 4:20 is just a higher DRAM frequency of 4:16?

Thanks

4:20 is just a higher DRAM frequency of 4:16 because with the 4:16 ratio DRAM Frequency = FSB*4 while with the 4:20 ratio DRAM Frequency = FSB*5.

[momosmokey]

Ah! Got it, thanks. I'll keep my current OC then.

Edited March 2, 2011 by xxmastermushxx