pc3200 running at pc2600 speeds?

[whoopyour]

Hey guys, this is my first post and its probably going to be one of the very few i make in this forum.

I have a ram issue i think, recently i installed a diagnostic program called pc wizard, it told me that i had 1024 mb pc2600 ram when i really have 1024 mb pc3200 DDR SDRAM(i run 2X pc 3200 512 mb DDR SDRAM). In my Bios at start up it also state's that i have 1024 mb pc2600 DDR SDRAM so im really not sure whats going on.

Now here is what pc wizard told me about my ram :

General Information :
DIMM0 (RAS 1, RAS 0) : 512 (Double Bank) - DIMM, SDRAM
DIMM1 (RAS 3, RAS 2) : 512 (Double Bank) - DIMM, SDRAM
DIMM2 : Empty
DIMM3 : Empty

Memory Controller Information :
Memory Controller : SIMM, DIMM, SDRAM
Number of connectors : 4
Max. Module Size : 512 MB
Max. Memory Size : 2048 MB
Supported Speed : 70ns, 60ns
Supported Voltages : 3.3v
Error Detection Method : 64-bit ECC
Error Correction Capability : Unspecified
Current/Supported Interleave : 1-way/1-way

Chipset Information :
Type : DDR-SDRAM PC2600
Frequency : 160 MHz
FSB/DRAM Multiplier : 5/4x
Channels : Single
ECC Diagnostic : No
CAS Latency (tCL) : 2.5 clocks
RAS to CAS (tRCD) : 3 clocks
RAS Precharge (tRP) : 3 clocks
Cycle Time (tRAS) : 7 clocks

Information EEPROM (DIMM0) :
Manufacturer : Hyundai Electronics
Part Number : HYMD264 646B8J-D43
Serial Number : 1C1BC06E
Type : DDR-SDRAM PC3200 (200 MHz)
Size : 512 MB (2 rows, 4 banks)
Module Buffered : No
Module Registered : No
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 2.5v
Supported Frequencies : 133 MHz, 166 MHz, 200 MHz
CAS Latency (tCL) : 2 clocks @133 MHz, 2.5 clocks @166 MHz, 3 clocks @200 MHz
RAS to CAS (tRCD) : 2 clocks @133 MHz, 3 clocks @166 MHz, 3 clocks @200 MHz
RAS Precharge (tRP) : 2 clocks @133 MHz, 3 clocks @166 MHz, 3 clocks @200 MHz
Cycle Time (tRAS) : 6 clocks @133 MHz, 7 clocks @166 MHz, 8 clocks @200 MHz

Information EEPROM (DIMM1) :
Manufacturer : Unspecified
Part Number :
Serial Number :
Type : DDR-SDRAM PC3200 (200 MHz)
Size : 512 MB (2 rows, 4 banks)
Module Buffered : No
Module Registered : No
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 2.5v
Supported Frequencies : 200 MHz
CAS Latency (tCL) : 2.5 clocks @200 MHz
RAS to CAS (tRCD) : 3 clocks @200 MHz
RAS Precharge (tRP) : 3 clocks @200 MHz
Cycle Time (tRAS) : 8 clocks @200 MHz

Im really not sure whats going on with that or what i can do to get better performance(aka: egtting it to run at 3200 speeds), any comments would be appreciatedespecially if there comments i can understand, remember im a noob. :angel:

here is my specs if it helps:
p4 with hyper threading,3.0 Ghz processor
windows xp media center edition
ram: look up ^^^^^
vid card: All in wonder 9600 xt 128 mb, and a tv tuner card
thx guys.

 

[sinkoman]

Well, is your motherboard dualchannel? If it is, I would think running memory that is not dual channel would slow down the speeds, but then again, I don't know much about dual channel.

 

[whoopyour]

ok well i have an Asus P4SD-LA Motherboard...and im not sure if that supports dual channel or not.

 

[Fil]

I have the same problem as you. I have 2 512MB Samsung sticks that are supposed to run at 200MHZ because they're PC3200 instead they run at 2500 speeds in dual channel mode. When i put the sticks by themselves they run at 200MHZ. I tried changing the memory clocks but it dint help. I tried changing and forcing it to run at pc3200 speeds in bios but that didn't help either. I'm thinking it's the ram or something but its pretty messed up. Can anyone help us? lol

 

[baron insig]

ram speed unless your motherboard is locked is morn ditermined by fsb speed eg if u have a 133 mhz fsb ur mem will run a ddr 266 ( 133 x 2)

ddr is jsut norm ram but writes twice per clock cycle instead of once ( so if u have a 200 mhz fsb it shud run at top speeds

 

[LostBok]

it'll only ID your memory as the speed you're running it at.... 'cos it's at 160Mhz, it'll ID them as PC2600(?).... I guess up tot 166Mhz and they'd be PC2700.... you need to clock them to 200Mhz and then they'll be seen as PC3200.

You've got your FSB at 5/4's of the mobo speed (if FSB/RAM = 5/4.... that'd explain "200Mhz FSB"/"160Mhz RAM" = 5/4.

Can you not switch it to 5/5's (matched) to mobo FSB speed?

I've found that even high-spec PC3200 cas2 DDR doesn;t always run at cas2 when at 200-Mhz.

 

[holydeadpenguins]

Um have you checked your bios settings, you may have them set at that speed.

 

[[Matt]]

just to straighten things out...

200MHz DDR = PC1600
266MHz DDR = PC2100
333MHz DDR = PC2700
400MHz DDR = PC3200

Anyhow it sounds to me like you will have to go into your motherboard BIOS and force your FSB to run at 200MHz when both sticks are installed. I had a similar thing happen to me on an old Nforce 2 board and fixed it by changing the FSB option from AUTO to 200MHz.

 

[LostBok]

there's a lot of unofficial "PC2xxx" and "PC3xxx" naming conventions out there.... one of my old Corsair XMS modules is labelled "PC3500, 433Mhz, cas2" - was from "back in the day" when PC2100 was the fastest you could normally get and DDR333 was out, but fairly unknown... I bought one of these for my VIA KT333 board and clocked the memory to 418Mhz, cas2.... that used to run for weeks on end without a prob!

Some software will ID the memory based on those unofficial naming conventions.

 

[whoopyour]

When I go into my advanced bios settings at start up, I cant find any thing that will let me change the speeds of my ram or my fbs/DRAM multiplyer to 5/5X instead of 5/4X.

Here is my motherboard once again:

asus P4SD-LA Motherboard

 

[[Matt]]

I know but PC2600 isn't one of them... In case anyone didnt know the PC number rating refers to the amount of data the memory interface can push over the northbridge. PC1600 means the ram has a bandwidth of 1600Mb/s or 1.6Gb/s. Quite a few PC ram standards are not rounded figures however and are simply rounded off. PC2700 actually has a bandwidth of 2.666 Gb/s. JEDEC were originally going to call PC2700 ram as PC2600 but at the last minute changed thier minds and rounded up instead of down.

 

[sinkoman]

When I go into my advanced bios settings at start up, I cant find any thing that will let me change the speeds of my ram or my fbs/DRAM multiplyer to 5/5X instead of 5/4X.

Here is my motherboard once again:

asus P4SD-LA Motherboard

Is your system a prebuilt? Like hp dell or compaq and you're just upgrading it? If so, then you can't change those settings.

 

[ailevation]

General Information :
DIMM0 (RAS 1, RAS 0) : 512 (Double Bank) - DIMM, SDRAM
DIMM1 (RAS 3, RAS 2) : 512 (Double Bank) - DIMM, SDRAM
DIMM2 : Empty
DIMM3 : Empty

You sure it's runnin' in dual channel? I think you're not... to run in dual channel you're gonna have to put one stick in slot "0" and one stick in slot "2" or slot "1" and slot "3".

 

[JHunter]

Im having the same problem on my A64 system. I have a pair of Corsair XMS 3200LLPT 512 in my system running in Dual Channel (Slots 1 and 3). When I run CPU-Z it tells me im at 157.9 frequency. Also, in my BIOS it claims to be running at 166mhz. Yet, when I go to the SPD tab, it tells me Frequency 200 MHZ on slot 1 and 3. Can anyone send me their RAM settings for an A64 Winchester 3500+ on a MSI Neo2 Platinum. Sorry for the hijack. :cheers:

 

[whoopyour]

I have an hp media ceneter pc m470n, and it only has 2 slots for memory and im not really trying to run my memery in dual channel at the moment cuzz i have another problem...if i can thats great but right now im trying to run my 2 512 DDR SDRAM pc 3200 sticks at 3200 speeds in single channel cuzz right now there running at 2700 speeds.

 

[whoopyour]

no worries guys i fixed it.... the timing on my 2 peaices of ram were different so i just threw in another stick of the same brand and took out the stock 512 pc 3200 that came with it so now i got dual 512 pc 3200 Azenram running at 200 mhz so its all good....thx for the help guys