My RAM is:
Kingston: KHX6400D2LLK2/4G
Geil: GX24GB6400DC
Status:
I have now tryed with 4 x 2 GB RAM (2 x Geil and 2 x Kingston).
I have tryed with Kingston alone, and Geil alone.
Nothing works, execpts only one RAM-block in a singel slot alone - that works.
I have checked the spec on your ram and I seriously doubt you will be able to run them all on the same board
- Kingston 4GB (2x2GB) HyperX DDR2 Dual Channel Memory, DDR2 800 (PC2-6400), 240-Pin, Unbuffered, Non-ECC, Model: KHX6400D2LLK2/4G
Kingston's KHX6400D2LLK2/4G is a kit of two low-latency 256M x 64-bit 2GB (2048MB) DDR2-800 CL4 SDRAM (Synchronous DRAM) memory modules, based on sixteen 128M x 8-bit DDR2 FBGA components per module. Total kit capacity is 4GB (4096MB). Each module pair has been tested to run at DDR2 800MHz at low latency timing of 4-4-4-12 at 1.95V. The SPD is programmed to JEDEC standard latency 667Mhz timing of 5-5-5-15 at 1.8V. Each 240-pin DIMM uses gold contact fingers and requires +1.8V.
Features & Specifications:
Model: KHX6400D2LLK2/4G.
Type: 240-pin DIMM SDRAM.
Capacity: 4GB (2GBx2).
Speed: DDR2 800MHz (PC2-6400).
Cas Latency: Low-Latency CL4 4-4-4-12.
Voltage: 1.95V.
ECC: No.
Registered/Unbuffered: Unbuffered.
- Geil DDR2 Value Dual Channel kit
PC2-6400 DDR2-800 C5 & C6 VALUE DUAL CHANNEL
SKU#: GX21GB6400DC | GX22GB6400DC l GX24GB6400DC
What is the best DDR2 performance module available at value-pricing? GeIL introduce to you the new model added to the VALUE Series of DDR2 – PC6400 DDR2 800 Mhz, CAS 5-5-5-15 The Value 800 Series, delivering best performance with the most competitive price.
Specification PC2-6400 800MHz CAS5 & CAS6 Dual Channel
- Available in 1GB, 2GB & 4GB Dual Channel Package
- Available CAS: 5-5-5, 6-6-6
- 240 pin, Non-ECC, Un-buffered DIMM
- Working Voltage 1.8~1.9V
- Aluminum Heat-spreader
- DBT (Die-hard Burn-in Technology) Enhanced
- Lifetime Warranty
the first problem is that they run at different voltages which might be difficult for a BIOS to accurately discriminate , the second problem is that they use different timings which is another issue where the BIOS might struggle to discriminate or run the more aggressive timings slower with any consistency ?
the third issue is a biggie , where the Geil ram is
value ram , this effectively means it was branded ram that failed the tolerance tests or it was produced as value ram in the first place which is where the manufacturers use the cheapest components at the time Dependant on the price of metals when they built them, these are very unlikely to match to any other ram with the same spec that wasn't bought from the same factory at the same time, let alone trying to match it to different spec branded
the Kingston ram is not on that compatibility list as the 2g sticks , and it's likely they might not be compatible, the Geil are not listed
the Kingston KVR800D2N6/4G are listed as being two dimms totalling 4gb ram

these run at 1.8v
I suggest focus on borrowing some ram to get a pair that work without crashes