Not sure why reading them is that big of a deal ?
The real question should be if it uses them ("Memory" tab from CPU-z), or just reads them (after you pick frequency from EPP) ?

dr_st wrote:

Dunno what it would do if there was both an EPP and a JEDEC profile for the same frequency.

^I set four basic timings + tRFC + CR + Voltage + Frequency manually.

It does whatever is set in BIOS.
If you didn't set anything on timing side (you left it on AUTO), it always will use JEDEC profile (unless you enable EPP Profile from proper option [example from NV board in my earlier post]).

agent_x007 wrote:

If you didn't set anything on timing side (you left it on AUTO), it always will use JEDEC profile

And what if there is no JEDEC profile for the matching frequency, like with my RAM?

Upon further inspection, I actually have no idea what it uses, because I just set the frequency to DDR2-667 (everything else is set to Auto), and strangely now CPU-Z shows which doesn't match any profile.

Conclusion, I guess, is that there is no way to be sure what 'Auto' settings will default to. To be sure, one should set timings and voltages manually.

I have a hard time believing the board would run the RAM at DDR2-1066 with the JEDEC profile of 800MHz, because that implies 1.8V and I don't think the RAM would even POST at 1.8V on 1066MHz. I would really need to look at the actual voltage, if possible. What is that tool that you have on your left that shows DDR voltage? Is that AIDA64? I have an older version of Everest Ultimate here and it doesn't show DDR voltage.

dr_st wrote:

Is that AIDA64? I have an older version of Everest Ultimate here and it doesn't show DDR voltage.

It looks like AIDA64/Everest to me and assuming it is then it will only show the actual DIMM voltages when the motherboard reports them.

Are they shown on the BIOS monitoring screen? If not then I suspect they can't be reported.

red-ray wrote:

Are they shown on the BIOS monitoring screen? If not then I suspect they can't be reported.

Didn't find them, so perhaps you are right.

Regular boards may not have it. I used Rampage Formula board though.
It has build-in voltage monitoring for most important stuff.
ROG line for LGA 775 has all bells and whistles when it comes to OC'ing 😀

I agree to your statement :

I have a hard time believing the board would run the RAM at DDR2-1066 with the JEDEC profile of 800MHz, because that implies 1.8V and I don't think the RAM would even POST at 1.8V on 1066MHz.

Basicly, if your CPU-z and Everest show your RAM as working with 1066MHz effective clock, and at CL5 timings (while stable under full load), you can safely assume BIOS adjusted DRAM Voltage as was needed. You only can't be sure what it set 😒 (mulimeter probe + DRAM VRM choke is needed).

agent_x007 wrote:

Regular boards may not have it. I used Rampage Formula board though.
It has build-in voltage monitoring for most important stuff.

Yep, you are right. This pic shows that the Rampage Formula has way more sensors exposed in the BIOS HW Monitor screen.

red-ray wrote:

agent_x007 wrote:

You want me to buy OPs memory, OC it as I wrote in my post and post screenshots ?
Because I'm pretty sure every other screenshot I post will just get "shot down" as "using not correct memory".

As to how you justify your statements is up to you, all I specified is that I feel you need to justify them.

Further given OP specified ok safer and better to use the lower voltage ones rather the lower cas ones I suspect he does not wish to overclock his DIMMs.

yes, you are right, i do not wish overclock anything, never been into overclocking

In that case, manually set Frequency to 800MHz and timings to CL5.5.5.18.
BIOS should keep DRAM Voltage at 1,8V level, even if it's left on [Auto].

PS. What board are you using ?
What plans do you have for this PC ?

agent_x007 wrote:

In that case, manually set Frequency to 800MHz and timings to CL5.5.5.18. BIOS should keep DRAM Voltage at 1,8V level, even if i […]
Show full quote

In that case, manually set Frequency to 800MHz and timings to CL5.5.5.18.
BIOS should keep DRAM Voltage at 1,8V level, even if it's left on [Auto].

PS. What board are you using ?
What plans do you have for this PC ?

what ram do you mean - lower timing/higher voltage or higher timings/lower voltage or both

this all readings from mobo bios

if i use only the higher timings/lower voltage ram and set my mobo to optimal, the timings all match

Memory Timing Settings
tCL - 5
tRCD - 5
tRP - 5
tRAS - 18
Command Per Clock - 2T

Advanced memory settings
tRRD - 3
tRC - 22
tWR - 5
tWTR - 9
tREF - 7.8us
i think the voltage reads on mobo - 1.87v

if i use only the lower timing/higher voltage ram and set my mobo to optimal, its say the same expect the voltage is a little bit higher at 1.93v

it this is greek to me

the mobo i am using is evga nvida 780i

plans for this rig is for xp/vista gaming (early 2000s - late 2000s)

red-ray wrote:

Robhalfordfan wrote:

how do i that

It depends on which OS the system is running, if it's running Windows NT, 2K, XP or later then you could download the SIV32L.zip that's attached to SIV support for 386/486/586 class + Alpha CPUs and 3dfx + S3 + SiS + Matrox + XGI + old ATI + NVidia GPUs - Testing Help, extract the files, run SIV32L.exe then press the [ SPD ] button and post a screen shot similar to as below. You could either do this twice, once for each pair of DIMMs or assume all four will be OK @ 1.8 volts and install all four.

here is my one using siv32l program with the ram with higher timings and lower voltage

Robhalfordfan wrote:

here is my one using siv32l program with the ram with higher timings and lower voltage […]
Show full quote

here is my one using siv32l program with the ram with higher timings and lower voltage

That all looks much I would expect. Are you happy with just having 2GB or do you also wish to use the other two DIMMs?

Have you tried installing the other two DIMMs on their own and if so what did SIV report?

Given you selected set my mobo to optimal I suspect it would use the EPP timings assuming there are some, did it?

What other options are there? Is there a standard type option? If you select that with the 2.1 volt DIMMs installed I suspect they will use the same timings as the 1.8 volt ones in the above screen shot. What DIMM voltage gets used?

If they do and the DIMM voltage is also 1.87 then it's safe to install all 4 DIMMs.

red-ray wrote:

That all looks much I would expect. Are you happy with just having 2GB or do you also wish to use the other two DIMMs? […]
Show full quote

Robhalfordfan wrote:

here is my one using siv32l program with the ram with higher timings and lower voltage […]
Show full quote

here is my one using siv32l program with the ram with higher timings and lower voltage

That all looks much I would expect. Are you happy with just having 2GB or do you also wish to use the other two DIMMs?

Have you tried installing the other two DIMMs on their own and if so what did SIV report?

Given you selected set my mobo to optimal I suspect it would use the EPP timings assuming there are some, did it?

What other options are there? Is there a standard type option? If you select that with the 2.1 volt DIMMs installed I suspect they will use the same timings as the 1.8 volt ones in the above screen shot. What DIMM voltage gets used?

If they do and the DIMM voltage is also 1.87 then it's safe to install all 4 DIMMs.

i would to fill all four slots to (4gb ram), well what 32-bit windows can address by default

are the sticks in pics - 800mhz as i am confused by second pic and it say 800mhz during post along with timings and also 128bit (with two sticks installed) (64-bit with one stick installed)

i can see what the other two report and post pic despite i think one the other sticks is not working cause the mobo beeps at me before post

the only options i have in bios is optimal or expert (which allows changing the timings etc)

i can have look in bios and see if it using EPP

Robhalfordfan wrote:

are the sticks in pics - 800mhz as i am confused by second pic and it say 800mhz during post along with timings and also 128bit (with two sticks installed) (64-bit with one stick installed)

The 800MHz is the data rate which is double the clock speed as they are double data rate DIMMs. If you hover the mouse over the [ 800MHz Dual DDR2 RAM ] the tooltip should say this.

With one DIMM installed it's Single Channel rather than Dual Channel so 64-bits rather than 128-bits.

Can you remove the 1.8 volts DIMMs, install one of the the 2.1 volt DIMMs and post another SIV screen shot. BTW .PNG gives crisper images than .JPG.

red-ray wrote:

The 800MHz is the data rate which is double the clock speed as they are double data rate DIMMs. If you hover the mouse over the […]
Show full quote

Robhalfordfan wrote:

are the sticks in pics - 800mhz as i am confused by second pic and it say 800mhz during post along with timings and also 128bit (with two sticks installed) (64-bit with one stick installed)

The 800MHz is the data rate which is double the clock speed as they are double data rate DIMMs. If you hover the mouse over the [ 800MHz Dual DDR2 RAM ] the tooltip should say this.

With one DIMM installed it's Single Channel rather than Dual Channel so 64-bits rather than 128-bits.

Can you remove the 1.8 volts DIMMs, install one of the the 2.1 volt DIMMs and post another SIV screen shot. BTW .PNG gives crisper images than .JPG.

both sticks working

optimal setting in bios - lower timings/higher voltage

manual setting in bios - lower timings/higher voltage

optimal setting in bios - both sets of sticks

Note - during post - a warning appeared saying that the system is in safe mode and to resit cpu or set memory settings

Robhalfordfan wrote:

https://www.vogons.org/download/file.php?id=70935 […]
Show full quote

optimal setting in bios - lower timings/higher voltage

This does not add up as it's higher timings of 5-5-5-18-22 that are being used and the voltage is still 1.87, either was with these settings you should be safe to install all 4 DIMMs. Check you get the same with all 4 installed.

I suspect you will get around 3GB of usable memory as the GPU will be using some.

It's strange that no EPP data gets reported and wonder if it's been programmed. Can you do Menu->File->Save Local and post SIV_WINXP.txt + SIV_WINXP.dmi (ZIP them) so I can check the raw SPD data?

Robhalfordfan wrote:

optimal setting in bios - both sets of sticks https://www.vogons.org/download/file.php?id=70937 Note - during post - a warning a […]
Show full quote

optimal setting in bios - both sets of sticks

Note - during post - a warning appeared saying that the system is in safe mode and to resit cpu or set memory settings

Ah you actually have 3 x 5DHX + 1 x 4DHX, given only 2.75GB can be used just install the 3 x 5DHX DIMMs which I suspect are all identical, are they?

thats weird cause the label on lower timing sticks both say it 4dhx

here the txt and dmi files zipped and in set to all opimal setting in bios

Robhalfordfan wrote:

thats weird cause the label on lower timing sticks both say it 4dhx

Yes one of the weirder effects 😕 . When things like this happen it reminds me what I ask for SIV screen shots as without them I would never have spotted this. I was starting to wonder if I had a bug in SIV so compared the raw data and none of them have EPP.

As you should see the only different is the 5DHX vs. the 4DHX. I would be inclined to remove the one that reports 4DHX and see if the system posts cleanly.

I guess you bought them as a matched set of four which clearly the are not, could you get a refund?

is that a huge different

the whole lot only cost about £10, so nae a huge loss

if i were gonna with one set and buy more later on to fill all four slots

which is better the 5dhx or 4dhx or is there not much of a different, performance wise

what is epp

Robhalfordfan wrote:

which is better the 5dhx or 4dhx or is there not much of a different, performance wise

what is epp

Performance wise the 5DHX and 4DHX should be identical.

EPP is short for Enhanced Performance Profiles and when present tells the BIOS the DIMMs can run faster than the JEDEC speeds. The 4DHX should have EPP, but they don't 😢 . I have attached the EPP specification for your edification and delight 😲

BTW I noticed the GeForce GTX 580 fan speed if reported as 762,060 RPM which is clearly 🤣. I don't expect this is an issue with SIV, but rather a bug in NVIDIA NVAPI 368.81 which is the latest supported release. You can either ignore it or try an earlier NVidia Driver. I suspect such as HWiNFO will also report 762,060 RPM.