CellShock DDR3, black vs blue

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22 Oct 2007
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Seeing the CellShock DDR3 PC3-15000C8 blue edition on special offer yesterday, I thought I'd grab a couple of sticks and compare them to my black PC3-14400C8. The blue is half the price of the black at the moment, so I was keen to get a couple of results. And here we go:

CPU: E8400 @ 450x9
Mobo: P5K3
NB: 1.4v

Blue edition: 1.9v real, 7-7-7-16 2T, SuperPi 32M 12m 07s
Black edition: 1.95v real, 7-6-5-15 2T, SuperPi 32M 11m 49s

I had to bump up vcore from 1.3125v to 1.3375v in the bios to get the blue stable; this is select Micron D9JNL at its best vs D9GTR, but for the money it's pretty good. JNL doesn't like volts or tight timings, however, in it's happy spot it's good RAM. Considering the SPD rating of PC3-8500....

I'm back on my black 'uns at the moment, I'll have another play with the blue later.
 
I've been running some more tests on these -

CPU: E8400 500x9
Mobo: P5K3
NB: 1.7v

Blue edition: 1.953v real, 8-8-8-16 2T, SuperPi 1M stable
Black edition: 2.03v real, 8-7-6-18 2T, SuperPi 1M stable

No amount of tweaking will get either pair stable at SPi 4M, so I reckon that's a mobo limitation - it "feels" that both pairs would go much further with a nicer chipset. Either way, both sets are in the DDR3 1000MHz club and I'm pretty pleased with that. Read bandwidth is ~ 11,800 MB/s, write is ~ 10,500 MB/s according to Everest; latency is 46 ns bang.
 
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