I bought TWIN2X2048-6400C4 latency 4 but why it run 5-5-5-18

[ahtze]

I opened CPU-Z and it says my ram running at 5-5-5-18

How can I fix this?

It is on the Memory tab,

Under Timings,

CAS # Latency 5 clocks
RAS# to CAS # Delay 5 Clocks
RAS # Precharge 5 Clocks
Cycle Time(Tras) 18 clocks

I checked on this page and it says
http://corsair.com/corsair/products/specs/TWIN2X2048-6400C4.pdf

S P D programmed at :

J E D E C s t a n d a r d 5 - 5 - 5 - 1 8 va l u e s a t 8 0 0MH z

E P P s t a n d a r d 4 - 4 - 4 - 1 2 - 2 T, 2 . 1 V va l u e s a t
8 0 0MH z

My ram is Enhanced Performance Profiles(EPP) but how do I run my ram at EPP?

 

[rammedstein]

your memory is runnign at 5-5-5-18, but your ram is specified to go much faster , go into the bioss, bump up the vdimm to 2.1v set your devider appropriately and set your latencies.

 

[1Tanker]

I opened CPU-Z and it says my ram running at 5-5-5-18

How can I fix this?

It is on the Memory tab,

Under Timings,

CAS # Latency 5 clocks
RAS# to CAS # Delay 5 Clocks
RAS # Precharge 5 Clocks
Cycle Time(Tras) 18 clocks

If I look on SPD,

It will says Cas# LAtency 4 under timing table. My system is running latency 5 or 4?

If CPU-Z says 5-5-5-18, than that's what you're running. You will have to go into your BIOS, and manually(disable.."By SPD") set the timings to 4-4-4-12. GL

 

[ahtze]

latency 5 and 4, will there be any different?

I don't want to over clock 🙁

 

[ahtze]

your memory is runnign at 5-5-5-18, but your ram is specified to go much faster , go into the bioss, bump up the vdimm to 2.1v set your devider appropriately and set your latencies.

Can you explain more on how to set it? I am using Biostar TForce 550. I never overclock. ^^;

I heard by manually overclocking, the ram will go unstable even with this ram.

 

[ahtze]

I checked this page

http://www.corsairmemory.com/corsair/configurator_search.html

This memory has been verified to operate at 675MHz at the low latencies of 4-4-4-12. This module is also available in matched pairs of "TwinX" modules tested as a set in a dual channel DDR2 motherboard.


But not at 800mhz?

Is 675MHZ 4-4-4-12 run faster than 800mhz 5-5-5-18??

If yes, why so? Is there a way to check?

 

[Xajel]

I have the same memory, you have to raise the voltage from 1.8 to 2.1 then change the latency to 4-4-4-12 T1 manully

I have ASUS M2N32-SLI Deluce WiFi so it's BIOS not as yours, I hope you can do it

 

[Mondoman]

....
I don't want to over clock 🙁

If you don't want to overclock, then there is nothing else you can do with this RAM. Unfortunately, you have fallen victim to the deceptive practice of manufacturer-sanctioned overclocking, where the company advertises their RAM only according to an overclocked speed/timings, not according to its speed/timings at the DDR2 standard 1.8V.
Here is more information: http://forumz.tomshardware.com/hardware/modules.php?name=Forums&file=viewtopic&p=1249881#1249881

I would either stick with this RAM at your current settings, or return it for a refund on the grounds of deceptive advertising, and buy some different RAM according to settings that will work at 1.8V.

 

[ahtze]

I set to 800mhz(default) and 4-4-4-12-2T and run memtest for 8 hours(long enough?) and shows no error. am I good to go? My PC will consume alot more watt changing from 1.8 to 2.1v? Or just a little bit

By the way, what is that 1T about?

 

[Silviastud]

You wont notice a difference in your power usage if that's all you have increased. And yeah that's prolly long enough for your stress test. And T1 is the command rate. Basically the ram will execute operations at each clock if it's at t1 and every other clock if at t2. T1 really only helps AMD systems. You wont notice much if you are using it with an intel CPU.

 

[Silviastud]

I checked this page

http://www.corsairmemory.com/corsair/configurator_search.html

This memory has been verified to operate at 675MHz at the low latencies of 4-4-4-12. This module is also available in matched pairs of "TwinX" modules tested as a set in a dual channel DDR2 motherboard.


But not at 800mhz?

Is 675MHZ 4-4-4-12 run faster than 800mhz 5-5-5-18??

If yes, why so? Is there a way to check?

Look:
http://www.corsairmemory.com/corsair/products/specs/TWIN2X2048-6400C4.pdf

Yours is not rated at 675 but 800mhz with latencies of 4-4-4-12 2.1v

Follow others comments thats pretty much it. That memory needs 2.1v and by the AUTO setting in the BIOS it will be set at 1.8v which is the "normal" specification of DDR2 voltage but yours require more power.

after raising the voltage set the timings manually at the tested values which are 4-4-4-12-2T <-- there the 2T timings is a little slower than 1T but it was TESTED at 2T to be working perfect so start by that.

Just curious but in your sig you say you have a 6300 allendale.... Well they are just conroe's with 2mb cache disabled. Allendales are just the 4k series.

 

[Mondoman]

...
Just curious but in your sig you say you have a 6300 allendale.... Well they are just conroe's with 2mb cache disabled. Allendales are just the 4k series.

You might want to double-check your sources. For example, compare the sSpec SL9SA E6300 with the sSpec SL9TA E6300.

 

[proof]

This is a known problem. Just go to the BIOS and change the timings.

 

[Silviastud]

...
Just curious but in your sig you say you have a 6300 allendale.... Well they are just conroe's with 2mb cache disabled. Allendales are just the 4k series.

You might want to double-check your sources. For example, compare the sSpec SL9SA E6300 with the sSpec SL9TA E6300.

Example 1

There is some contention as to whether currently-available low-end Core 2 Duo desktop processors (E6300, at 1.86 GHz and E6400, at 2.13 GHz, both with 2MiB L2 cache) are specimens of the Allendale core. Until Q1 2007, all E6300 and E6400 processors released were Conroe (4 MiB L2 cache) cores with half their L2 cache disabled. The Allendale core, manufactured with 2 MiB L2 cache in total, offers a smaller die size and therefore greater yields.

Quoted from The Tech Report:

You'll find plenty of sources that will tell you the code name for these 2MB Core 2 Duo processors is "Allendale," but Intel says otherwise. These CPUs are still code-named "Conroe," which makes sense since they're the same physical chips with half of their L2 cache disabled. Intel may well be cooking up a chip code-named Allendale with 2MB of L2 cache natively, but this is not that chip.

When I look at intel's specs on the SA and TA I find both use a 266MHz fsb which points to Conroe being as the Allendales are to utilize a base fsb of 200MHz...

 

[Mondoman]

The FSB speed isn't fixed by the design, so that doesn't help distinguish them. What I was getting at is that the E4300s are stepping L2, and have C1E power of 12W.
However, the E6300s are two types: SAs are B2 stepping and have C1E power of 22W, like the E6600 for example. TAs are L2 stepping and have C1E power of 12W, like the E4300.
That sure seems like it could represent a switch from Conroe to Allendale. Not a big deal either way, but for murky issues like this it's nice to stick to real Intel sources/refs, as info can often get distorted by middlemen.

 

[Silviastud]

Agreed, but the fsb isn't fixed at 200 or 266 but it is sold to run at those particular fsb's. Anywho I apologize for even beginning this discussion in this thread and was just curious about what he actually was running.

Sorry for semi-hijacking this thread and wont happen again.