DX48BT2 and TW3X4G1600C9DHX want to run 1333MHZ

[aBsOlUt]

Hey guys,

 

I have had my new system up and running for a month now. Everything has been working flawlessly with an exception of a few USB BSOD's that I think have to do with the crappy driver of my wireless usb stick.

 

I have read numerous threads about people trying to reach 1600MHZ with that board and Intel tech support told me that this board is capable of that speed at 1.5V only. However, this RAM per the PDF, has been tested to reach 1600MHZ at 1.8V.

 

I am not going to argue or waste my time about who is wrong or right because this is not the speed I want to reach.

 

The default speed that the bios set was 1066MHZ. I am trying to optimize my system and I want to reach 1333MHZ so it syncs up nicely with my Q9550 1333FSB and speed up the system even more =)

 

I am having second thoughts about it. I've read stories of people not being able to POST albeit most of them deal with trying to reach 1600MHZ mark.

 

Is there anyone here that can confirm it is safe to try and set the speed at 1333MHZ and do a lot in here run at 1333MHZ with no problems?

 

If it involves a lot of voltage changes I'd rather not to even though I have a bit of knowledge about overclocking I do not want to harm my system.

 

Thanks a lot!

[Wired]

Since the memory supports speeds higher than that, all you should have to do is to set the memory voltage to 1.8v and the memory speed to 1333 Mhz.

[DerekT]

Download Memtest86+ V2.01 from--->

Here

and extract the ISO image. Burn the ISO image to an CD-ROM disk.

Download CPU-z from

Here

.

 

Performance

Host Clock Frequency Override = Manual
x Host Clock Frequency (Mhz) = 333

Memory Configuration

Reference Frequency = 333
Memory Frequency = 1333

tCL 9
tRCD 9
tRP 9
tRASmin 24
tRFC 60
tRRD 4
tWR 8
tWTR 4
tRTP 4
Memory Voltage 1.6v
Command Rate 2T

 

Boot to the Memtest CD and allow for two full passes. Then, if stable, enter Windows and run CPU-z. Post screenshots of CPU-z's CPU, Memory and SPD tabs.

[aBsOlUt]

Thanks for the responses, so it is impossible to just go set the speed at 1333MHZ in the bios without touching anything else? All these timings and voltage changes scare me...

 

By the way DerekT on your recommendations you say memory voltage 1.6v is that a typo or intentional?

 

Thanks and I might give what you told me a shot...I really hope this wont harm my system...

[007bont]

No, but rest assured. Derek didnt post any voltages that will make the smoke come out of your system ;):

[DerekT]

Since you are frightened, take the computer to a tech shop and tell them what you want. Have them do it.

[aBsOlUt]

Derek, did not mean to insult your recommendation.

 

Another friend recently with a similar setup had a bunch of problems when he was trying to reach 1600MHZ and it would not post. It turned out a faulty power supply and burned both his HDD's.

 

Anyway, I am gonna give it a shot tonight, again did not mean to sound insulting on your recommendation. :)

 

Thanks!

[DerekT]

Derek, did not mean to insult your recommendation.

 

Another friend recently with a similar setup had a bunch of problems when he was trying to reach 1600MHZ and it would not post. It turned out a faulty power supply and burned both his HDD's.

 

Anyway, I am gonna give it a shot tonight, again did not mean to sound insulting on your recommendation. :)

 

Thanks!

 

I'm not insulted at all. There are some people who are too frightened to make changes. This is understandable when the person does not have the requisite knowledge to make the changes whilst informed. So, the next step is to find someone who has that knowledge and have them make the changes.

 

I do not work on my car engine. I get a mechanic to tune it up. :D:

[007bont]

I do not work on my car engine. I get a mechanic to tune it up. :D:

 

who wants to make a bet, that the mechanic brings his pc to Derek? :D:

[DerekT]

who wants to make a bet, that the mechanic brings his pc to Derek? :D:

 

LOL

 

Actually not the mechanic, but I do outfit the shop's systems. :p:

[aBsOlUt]

I did it! Everything seems fine, however I have a few questions

 

- I read about CAS latency being longer is worse, and i Know my timings used to be 7-7-7-20 compared to what they are now. Does the MHZ difference cover up for this?

 

- Why does CPU-Z mention FSB:DRAM ratio as 1:2? Both are running at 1333MHZ, is it because the memory is Double Data Rate? I do not remember my old ratio by the way.

 

So far so good, been running for 10-15 minutes :)

 

Thanks!

[DerekT]

I did it! Everything seems fine, however I have a few questions

 

- I read about CAS latency being longer is worse, and i Know my timings used to be 7-7-7-20 compared to what they are now. Does the MHZ difference cover up for this?

 

Your DRAM is C9 not C7. Possibly the Auto settings set to a very low speed and the timings low as well. With Intel using a memory controller on the motherboard, faster bandwidth is actually better up to a point where both bandwidth and latency become a moot point and only desirable for benchmarking tests.

 

IWhy does CPU-Z mention FSB:DRAM ratio as 1:2? Both are running at 1333MHZ, is it because the memory is Double Data Rate?

 

Your CPU is Quad Pumped ie. a 333MHz FSB Strobe (333 * 4 = 1333Mhz) and your DRAM is 667Mhz double pumped ie. a 667Mhz Strobe (667 * 2 = 1333Mhz). Double Pumped = Double Data Rate = DDR as you correctly ascertained. The CPU can access the Memory Controller at FSB speed and the Memory Controller can access RAM at memory bus speed. If both the memory bus and FSB bus run synchronously (round ratios like 1:1, 2:1, 1:2, ...), the memory content pretty much goes straight through the controller to the CPU. If running asynchronously, the controller will "hold" (in some kind of internal memory, registry, cache) the data until the next FSB access gets the data; if you miss the bus (no pun intended), your data must wait for the next one, just as you would if you missed the bus (pun intended) :D:

 

http://i259.photobucket.com/albums/hh293/DerekT2008/sine.jpg

 

The CPU FSB is quad pumped and can accept data 4 times per clock cycle as previously mentioned. The DDR cycles at 667MHz and is double pumped so the points when it can transfer data will coincide with the points where the FSB clock cycle can accept. In the diagram, you will have the green curve being the CPU FSB with the blue dots the points where it can access data. The black curve is the RAM bus clock, and the brown points are when it can transfer. This diagram is for purposes of understanding and should NOT be thought of as electronically correct as there is a second DRAM signal to be accounted for as well.

 

Further Research:

 

http://www.directron.com/fsbguide.html

http://download.micron.com/pdf/technotes/ddr2/TN4706.pdf

http://www.intel.com/technology/memory/index.htm

http://en.wikipedia.org/wiki/DDR2_SDRAM

http://en.wikipedia.org/wiki/Memory_Divider

http://www.tomshardware.co.uk/ddr3-1333-shootout,review-29939-17.html

 

Knock yourself out. :D: