On 07/17/2013 10:57 PM, Stan Hoeppner wrote:
On 7/16/2013 6:30 PM, Gary Roach wrote:
I can't say
that the memory is absolutely good but can say with a high degree of
certainty that it is the correct memory for the system.
I gave you the exact JEDEC specs the 4x 1GB DIMMs need to be, and you
didn't respond to that. Post the part identification number and density
information located on the sticker on each of the 4 DIMMs.
Either the board has a problem or the DIMMs are the problem. Apparently
the board worked fine for years before you added RAM, correct? That
makes the DIMMs the likely suspect.
I am going to try running sysbench on the memory and see if that
uncovers anything. I know that it is primarily for bench testing but may
uncover something.
Sysbench can't tell you why the BIOS doesn't see all of the RAM. It
might reveal a timing problem, or bad cells, but such issues won't cause
the main problem you have.
Lets kind of start over.
1) I thought I said early on that this was a new to me, used, mobo.
I don't know if it worked before.
2) The bios in setup mode lists 4 memory modules
3) The bios on post checks finds only 2.92GB of ram
4) The Kingston KVR400 series modules are recommended by Intel for
the D865PERL mobo.
5) I ran memtest86+ on the system. The program found no errors but
only found 3 memory slots.
6) I installed lm-sensor. i2c-tools and modprobed the eeprom kernel
module. This allowed me to run decode-dimms. This program reads the SPD
information off of each of the memory modules. This program found all 4
modules. The listing for all 4 modules were identical with the exeption
of the serial numbers. The results from the 4th module was:
---=== SPD EEPROM Information ===---
EEPROM Checksum of bytes 0-62 OK (0xA9)
# of bytes written to SDRAM EEPROM 128
Total number of bytes in EEPROM 256
Fundamental Memory type DDR SDRAM
SPD Revision 1.0
---=== Memory Characteristics ===---
Maximum module speed 400MHz (PC3200)
Size 1024 MB
Voltage Interface Level SSTL 2.5V
Module Configuration Type No Parity
Refresh Rate Reduced (7.8 us) -
Self Refresh
tCL-tRCD-tRP-tRAS 3-3-3-8
Supported CAS Latencies 3T, 2.5T
Supported CS Latencies 0
Supported WE Latencies 1
Minimum Cycle Time 5 ns at CAS 3
6 ns at CAS 2.5
Maximum Access Time 0.65 ns at CAS 3
0.7 ns at CAS 2.5
---=== Manufacturing Information ===---
Manufacturer Kingston
Manufacturing Location Code 0x04
Part Number K
Manufacturing Date 2008-W46
Assembly Serial Number 0x6E146732
Number of SDRAM DIMMs detected and decoded: 4
At this point I strongly suspect that the bios is defective. My next
move is to reburn it.
Gary R