ASUS P5B & KINGSTON KHX6400D2/1G HYPERX PC6400 800 recognised as PC2-5300!

[retroborg]

Hello,
I recently bought a new Mother Board (ASUS P5B) & Core 2 Duo 6600 @ 2.4GHZ:

ASUS P5B:
http://www.asus.com/products4.aspx?l...78&modelmenu=1

I installed the following Ram:
KINGSTON KHX6400D2/1G HYPERX 1GB PC6400 800MHZ
http://www.e-shop.gr/show_per.phtml?id=PER.554789

But, when the system boots up, at the American Megatrends Bios DOS screen, the memory is recognized as:
PC2-5300 667MHz and not PC2-6400 800MHZ!

I updated the Bios to 1007 from here:
http://support.asus.com/download/dow...n-us&model=P5B

But the same problem persists!

I read in the manual:
http://support.asus.com/download/dow...n-us&model=P5B

Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run at DDR2-667 by default setting. If you want to operate with lower latency, adjust the memory timing manually.

Some old-version DDR2-800/667 DIMMs, may not match Intel's On-Die-Termination (ODT) requirement and will automatically downgrade to run at DDR2-533. If this happens, contact your memory vendor to check the ODT value.

I can’t find any section on the BIOS menu where I could adjust the memory tiomings manually?!
But this specific Kingston RAM is mentioned as CL5, with timings:5-5-5-15, so this shouldn’t be happening!?

Also, in the manual, at the P5B Premium Series M/B Qualified Vendors List (QVL) DD2-800MHZ capability, Kingston 1GB DDR2-800MHZ is listed, but not my specific KINGSTON KHX6400D2/1G HYPERX 1GB PC6400 800MHZ model.

Is there any solution to this problem or should I change the brand of the RAM or even the M/B?
Please, any help will be highly appreciated!

Thanks in advance.

[Clunk]

chipset/northbridge/by spd = disabled

That will let you manually set the timings. The board will be reading the SPD, so you need to manually enter everything.

[retroborg]

OK, got it!
It was in the Advanced, "JumperFree Configuration", you can set the DRAM frequency to DDR-800MHZ, 889MHZ, even up to 1066MHZ!

Cool!
Me Happy!

[Clunk]

Youll still need to set the timings manually.

[retroborg]

OK, Thanks!
So, I disabled the spd in the Chipset/Northbridge menu and set the DRAM CL=5. (It was all ready CL=5 by default)

But, there are a few other fields in this menu, which I’m not familiar with:

Memory Remap Feature = [Disabled]
Configure DRAM Timing by SPD = [Disabled]
DRAM CAS# Latency = [5]
DRAM RAS# Precharge = [6 DRAM Clocks]
DRAM RAS# to CAS# Delay = [6 DRAM Clocks]
DRAM RAS# Activate to Precharge = [15 DRAM Clocks]
DRAM Write Recovery Time = [6 DRAM Clocks]
DRAM TRFC = [42 DRAM Clocks]
DRAM TRRD = [10]
RANK Write To Read Delay = [10]
Read To Precharge Delay = [10]
Write To Precharge Delay = [10]
Static Read Control = [Auto]
Initiate Graphic Adapter PEG/PCI

REG Port Configuration
REG Force x 1 = [Disabled]

But since I’m not sure what they’re used for, I left them as they are.


But, shouldn't it be:
DRAM CAS# Latency = [5]
DRAM RAS# Precharge = [5 DRAM Clocks]
DRAM RAS# to CAS# Delay = [5 DRAM Clocks]
DRAM RAS# Activate to Precharge = [15 DRAM Clocks]

In order to achieve the factory Timings: 5-5-5-15 of this specific Kingston RAM?

What do you suggest?

Also in the Jumperfree menu, there is this field:

AI Tuning = [Auto]
If set to manual, you can change the CPU frequency/voltage, PCI frequency, etc…

Thanks in advance.

[Clunk]

OK, Thanks!
So, I disabled the spd in the Chipset/Northbridge menu and set the DRAM CL=5. (It was all ready CL=5 by default)

But, there are a few other fields in this menu, which I’m not familiar with:

Memory Remap Feature = [Disabled] disabled
Configure DRAM Timing by SPD = [Disabled] disabled
DRAM CAS# Latency = [5] 5
DRAM RAS# Precharge = [6 DRAM Clocks] 5
DRAM RAS# to CAS# Delay = [6 DRAM Clocks] 5
DRAM RAS# Activate to Precharge = [15 DRAM Clocks] 15
DRAM Write Recovery Time = [6 DRAM Clocks] check what the manufacturer recommends
DRAM TRFC = [42 DRAM Clocks]check what the manufacturer recommends
DRAM TRRD = [10]check what the manufacturer recommends
RANK Write To Read Delay = [10] check what the manufacturer recommends
Read To Precharge Delay = [10] check what the manufacturer recommends
Write To Precharge Delay = [10] check what the manufacturer recommends
Static Read Control = [Auto] leave on auto
Initiate Graphic Adapter PEG/PCI

REG Port Configuration
REG Force x 1 = [Disabled]

But since I’m not sure what they’re used for, I left them as they are.


But, shouldn't it be:
DRAM CAS# Latency = [5]
DRAM RAS# Precharge = [5 DRAM Clocks]
DRAM RAS# to CAS# Delay = [5 DRAM Clocks]
DRAM RAS# Activate to Precharge = [15 DRAM Clocks]

In order to achieve the factory Timings: 5-5-5-15 of this specific Kingston RAM?

What do you suggest?

Also in the Jumperfree menu, there is this field:

AI Tuning = [Auto]
If set to manual, you can change the CPU frequency/voltage, PCI frequency, etc…

Thanks in advance.

The rest is ok.

Some of the timings that are set to 10, sometimes they will need to be changed if you are having problems getting stable in memtest.

[retroborg]

OK, so I disabled SPD and set the right timings: 5,5,5,15 and in the Advanced, "Jumper Free Configuration", I set the DRAM frequency to DDR-800MHZ, so when the system boots up, (at the American Megatrends Bios DOS screen), the memory is indeed recognized as:
PC2-6400 800MHZ and not PC2-5300 667MHz.

But I noticed that when I use CPU-Z 1.38, in the “SPD” field, the two DDR-2 modules are recognised as PC2-5300 (333MHZ)?


Where as in the “Memory” field, the frequency and timings are right: 400MHZ, timings: 5,5,5,15


Also, the ASUS P5B-E P965 M/B uses an ICH8R Southbridge chipset, but CPU-Z 1.38 recognizes it as ICH8?


Is there anything wrong with my Bios setting that leads CPU-Z in wrongfully recognizing the memory type & chipset?

Thanks in advance.

[Clunk]

Maybe cpu-z needs an update. Maybe your ram really is 5300?

Sometimes if you buy fast ram that hasnt yet got a Jedec specification, the SPD will show it as the highest previous rated type. So, for example, lets say that pc2-6400 hadnt yet been formally approved as a spec, then even ram that was rated to run at pc2-6400 would still carry pc2-5300 in its SPD.

Im not saying that this is what has happened with yours (date of manufacture rules that out), but if it runs at the speed that it should, then dont worry about it

edit: Mine shows as 6400 when really it is 9200.

[retroborg]

Maybe your ram really is 5300?.

No, these are PC2-6400 Kingston HyperX 1GB 800MHZ Dimms.

Sometimes if you buy fast ram that hasnt yet got a Jedec specification, the SPD will show it as the highest previous rated type. So, for example, lets say that pc2-6400 hadnt yet been formally approved as a spec, then even ram that was rated to run at pc2-6400 would still carry pc2-5300 in its SPD.

I think this would be the case.



But what about the ICH8R Southbridge chipset, being recognized as ICH8?

[Clunk]

But what about the ICH8R Southbridge chipset, being recognized as ICH8?

Dunno about that, mine also says ICH8....wait for version 1.39 maybe?

[IAmATeaf]

But what about the ICH8R Southbridge chipset, being recognized as ICH8?

Seen loads of posts on this on this and other sites, nothing to worry about is the general answer.

[retroborg]

Well, there is a new version CPU-Z 1.39:
http://www.softpedia.com/get/System/...fo/CPU-Z.shtml

It recognizes the ICH8R southbridge chipset, but it still says:
pc2-5300 instead of PC2-6400.

[simkin101]

I know this post is a little older, but here is some info that I dug up about this exact issue. I got this data direct from kingston.com:

Some motherboard BIOS may need to be manually adjusted. There are over a million different combinations available. The most common are those that help DRAM speed, DRAM timings, and voltage. CLICK HERE for the proper settings.

Further, when digging even deeper, I found this statemenet for this exact model memory chip (KHX6400D2/1G):

This module has been tested to run at DDR2 800MHz at low latency timing of 5-5-5-15 at 2.0V. The
SPD is programmed to JEDEC standard latency 667Mhz timing of 5-5-5-15 at 1.8V.

Hope this helps in case anyone else has this issue.