Memory

[xXxZxXx]

I'm trying to figure out why my computer memory is running at 400 MHz and it says the same thing on my friends computer. We have the identical motherboards with different memory. His is Crucial Ballisticz 4GB and mine is Corsair Twinx 2 GB. I'm running windows vista and he is running windows xp. We noticed it on everest. Any reason to this or is it normal.

This is what PC Wizard says on my memory:

eneral Information :
DIMM_A1 (RAS 0) : 1024 (Single Bank)
DIMM_B1 (RAS 2) : 1024 (Single Bank)
DIMM_A2 : Empty
DIMM_B2 : Empty

Information SPD EEPROM (DIMM_A1) :
Manufacturer : Corsair
Part Number : CM2X1024-6400C4
Serial Number : Unspecified
Type : DDR2-SDRAM PC2-6400 (399 MHz) - [DDR2-800]
Format : Regular UDIMM (133.35 x 3)
Size : 1024 MB (1 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : Yes
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Prefetch Buffer : 4-bit
Manufacture : 2000
Supported Frequencies : 270 MHz, 400 MHz
CAS Latency (tCL) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS to CAS (tRCD) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS Precharge (tRP) : 4 clocks @270 MHz, 5 clocks @400 MHz
Cycle Time (tRAS) : 13 clocks @270 MHz, 18 clocks @400 MHz
Min TRC : 15 clocks @270 MHz, 22 clocks @400 MHz

EPP Profile #1 : Full Performance
Voltage Level : 2.1V
Address Command Rate : 2T
Cycle Time : 2.5ns @400 MHz
CAS Latency (tCL) : 4 clocks
RAS to CAS (tRCD) : 4 clocks
RAS Precharge (tRP) : 4 clocks
Cycle Time (tRAS) : 12 clocks
tRC : 102 clocks
tWR : 26 clocks

Information SPD EEPROM (DIMM_B1) :
Manufacturer : Corsair
Part Number : CM2X1024-6400C4
Serial Number : Unspecified
Type : DDR2-SDRAM PC2-6400 (399 MHz) - [DDR2-800]
Format : Regular UDIMM (133.35 x 3)
Size : 1024 MB (1 ranks, 8 banks)
Module Buffered : No
Module Registered : No
Module SLi Ready (EPP) : Yes
Width : 64-bit
Error Correction Capability : No
Max. Burst Length : 8
Refresh : Reduced (.5x)7.8 µs, Self Refresh
Voltage : SSTL 1.8v
Prefetch Buffer : 4-bit
Manufacture : 2000
Supported Frequencies : 270 MHz, 400 MHz
CAS Latency (tCL) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS to CAS (tRCD) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS Precharge (tRP) : 4 clocks @270 MHz, 5 clocks @400 MHz
Cycle Time (tRAS) : 13 clocks @270 MHz, 18 clocks @400 MHz
Min TRC : 15 clocks @270 MHz, 22 clocks @400 MHz

EPP Profile #1 : Full Performance
Voltage Level : 2.1V
Address Command Rate : 2T
Cycle Time : 2.5ns @400 MHz
CAS Latency (tCL) : 4 clocks
RAS to CAS (tRCD) : 4 clocks
RAS Precharge (tRP) : 4 clocks
Cycle Time (tRAS) : 12 clocks
tRC : 102 clocks
tWR : 26 clocks

Memory Controller Information :
Memory Controller : Standard, SDRAM
Number of connectors : 4
Max. Module Size : 1024 MB
Max. Memory Size : 4096 MB
Supported Speed : 70ns, 60ns, 50ns
Supported Voltages : 2.9v
Error Detection Method : 64-bit ECC
Error Correction Capability : None
Current/Supported Interleave : 1-way/1-way

 

[woody1191]

I'm trying to figure out why my computer memory is running at 400 MHz and it says the same thing on my friends computer. We have the identical motherboards with different memory. His is Crucial Ballisticz 4GB and mine is Corsair Twinx 2 GB. I'm running windows vista and he is running windows xp. We noticed it on everest. Any reason to this or is it normal.


Type : DDR2-SDRAM PC2-6400 (399 MHz) - [DDR2-800]
Format : Regular UDIMM (133.35 x 3)
Width : 64-bit
Supported Frequencies : 270 MHz, 400 MHz
CAS Latency (tCL) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS to CAS (tRCD) : 4 clocks @270 MHz, 5 clocks @400 MHz
RAS Precharge (tRP) : 4 clocks @270 MHz, 5 clocks @400 MHz
Cycle Time (tRAS) : 13 clocks @270 MHz, 18 clocks @400 MHz
Min TRC : 15 clocks @270 MHz, 22 clocks @400 MHz

Ok please take note of this above since it is DDR2 Memory you have a Double Frequency, DDR stands for Double Data Rate.

So for example DDR 400mhz RAM would be just 400mhz Bus Frequency while if it was DDR2 it would be 800mhz (Multiplied By 2) and if DDR3 it would be 1200mhz (Multiplied By 3).

Do you see what happens there?

Hopefully that answers your Question.

 

[xXxZxXx]

Oh ok, so being that it says that, my memory is actually running at 800 MHz?

 

[woody1191]

Yes your Memory is running at 800Mhz based on the Information above.

 

[xXxZxXx]

Alrighty, thanks.

 

[Tedster]

https://www.techspot.com/vb/topic65114.html