Corsair Fails SPD Rating - No Overclock

I'm a bit confused and certainly disappointed. Sandra benchmarks are far below what they should be. The system will not boot even to the BIOS at the rated timings. This system is unstable at even a modest 10% overclock. Solid airflow and good cooling in the case. < 38C case temp.

Any comments or thoughts are appreciated.


First the system:

P4P800 DLX BIOS-1016
P4-3.0c D1-9 Retail Box
TWINX1024-3200LLPRO
WD 200GB 7200 WD2000JD SATA
BFG GeForce FX 5700 Ultra
ANTEC TRUEBLUE 480


Now the issues:

Using memtest-86 3.1

1. Stable
200FSB
1:1
1.55 Vcore
2.55 Vdimm
1.5 Vagp
MAM Enabled

2. Unstable
220FSB
1:1
1.60 Vcore
2.85 Vdimm
1.6 Vagp
MAM and SS disabled

3. SPD configures this as 2.5-3-2-6 rather than the rated and "SPD programmed" 2.0-3-2-6.

4. Setting all BIOS defaults except manual timing to 2.0-3-2-6 - will not boot even to BIOS

5. Setting all Bios Defaults, Sandra benches at 4306 MB/s. Sandra's benchmark for the 865PE 2xPC3200 is 4888 MB/s

well you are trying to overclock some CH-5 chips ...yes it is stable at 1:1 and 200FSB but 220FSB..yea right..mayb a voltage mod will work..you need to give it more voltages to get pc3200 at that speed...try 5:4 divider and you can oc alot higher...keep the vdimm to the max

Bad memory is not unheard of; you may have some. Try one stick at at time to see if one particular stick is the culprit. If your memory will not run it's rated timings at its rated speed, RMA it. I RMAed my first sticks of Corsair a few months ago - they have a very good forum on the Corsair site to discuss your problems and submit an RMA form.

Sophisticated, the P4P800 will drop the memory divider when AUTO overclocking (sometime is drops to 3:2, sometimes it drops to 5:4). Either way, the board is not trying to run PC3200 at DDR440.

mayb thats the problem...mayb he needs to maually set it to 5:4 divider..as he said he had it in 1:1 divider obviously it wasnt in 5:4 or 3:2...why should he RMA...they run at its rated speed 400MHz...he is tryn to run some CH-5s at 440MHz at 2.8vdimm..dont u think u need more volts or less divider??

The minimum sweet spot at 5:4 for this setup is 240fsb. I don’t want to run the memory any slower than 192. Unfortunately at 240fsb it will not run stable at any configuration. 2.85Vdimm is the max for this board without any mods.

While the memory passes the speed rating, it fails the “"SPD programmed" timings, both as a SPD auto config, and a manual setting.

Testing each stick individually is a good suggestion, however they are a matched set, and if necessary would be RMA as such.

Note: All overclock settings have been manual - not Asus’ less than useful “Overclock Tuner”.

yes get your money back actually roll with some Komusa A-data pc3200 the timmings are relaxed but they can run up pretty high on low voltage in 1:1...Maxvla hit 301FSB @ 1:1 wiht some Komusa PC4200 A-data's