Patriot 1600 memory can't be overclocked on P6T?

[jerrry94087]

I just bought 24 GB Patriot memory PV7324G1600ELHK for Asus P6T motherboard.

Two things bother me:
1. Memtest (v.4.20) tells me that this memory is PC3-8500, not PC3-12800 as I would have expected based on frequency 1600. Sticker on the box says PC3-12800.
2. I couldn't overclock it a bit: even with the next available frequency 1866 system doesn't boot at all or memtest crashes immediately.
I could overclock my older 1600 memory even to 2133.

Why memtest says it's PC3-8500? 8500 corresponds to DDR3-1066, not DDR3-1600.

I have a suspicion that this is really a mislabeled memory and it is really DDR-1066 and 1600 is an overclocking form it. Can this be the case?

I was going to buy Corsair DDR-1600, but Patriot was $30 cheaper and I went for it.

Can Corsair 1600 be overclocked on P6T? I think it should be possible. I am thinking about returning patriot memory and getting Corsair.

 

[Psykoikonov]

1.Memtest says my one of my kits of DDR3 1600 is DDR3 800, not sure what is up with that but mine is incorrectly detected/represented too.
2.Some companies/modules bin the RAM very tightly ie.some will overclock and some don't. The RAM you have might run at DDR3 1866 with looser timings.

Screenshots of CPUz with Memory and SPD tabs open would help answer the question what they are rated for.

 

[redduc900]

At the default BCLK of 133, the BIOS auto-adjusts the DRAM multiplier to x8 = DDR3-1066 (PC3-8500). You just need to manually adjust the DRAM frequency to DDR3-1600 (x12 DRAM multiplier). And why would you want to run RAM rated at DDR3-1600 at DDR3-1866 or as high as DDR3-2133 w/ substantially looser timings? They're already rated loosely at 9-9-9-24 at their rated 800MHz, including the fact that bandwidth will be higher at the lower frequency and rated timings compared to a higher frequency w/ looser timings. It's no wonder Memtest failed at DDR3-1866, since that's 133MHz (DDR3-266 effective) higher than what the modules are rated to run at, especially if you didn't loosen the timings and / or increase the DRAM voltage.