TwinMOS are a relatively young Taiwanese ISO9002 memory
manufacturer with some very attractive offerings to the performance market.
Basing their manufacturing on a solder paste printing foundation (generally
accepted as the best means to employ for consistent production quality) and
module testing on a Sigma III, mainboard compliance also appears to be a factor
|Even though the sticker says PC2100, I was guaranteed it would hit 166 MHz FSB!|
A little tip I was given a long time ago when
I went out to buy memory was, "good ram looks good." I can honestly say that the TwinMOS 184-pin DIMM
looks better then the adjacent Crucial memory. For example, the traces seem cleaner
and the PCB just looks better - I know I know it's subjective....
Anyway, both sticks of memory use high quality TSOP DRAM chips.
The TwinMOS stick comes to the table packing
Samsung K4H280838B-TCB0 modules, and the Crucial with Micron chips.
|K4280838B-TCB0 Memory Module
Double-data-rate architecture; two data transfers per clock cycle
Bidirectional data strobe(DQS)
Four banks operation
Differential clock inputs(CK and CK)
DLL aligns DQ and DQS transition with CK transition
MRS cycle with address key programs
- Read latency 2, 2.5 (clock)
- Burst length (2, 4, 8)
Burst type (sequential & interleave)
All inputs except data & DM are sampled at the positive
going edge of the system clock(CK)
Data I/O transactions on both edges of data strobe
Edge aligned data output, center aligned data input
LDM,UDM/DM for write masking only
Auto & Self refresh
15.6us refresh interval(4K/64ms refresh)
Maximum burst refresh cycle : 8
66pin TSOP II package
We had been told by the manufacturer
that the TwinMOS was supposed to go up to 166 MHz FSB - effectively making
it PC2700 DDRAM - so I was very curious to see for myself.
Being limited to a Iwill KA266
however meant we had not choice but to max-out at 146 MHz FSB (we should have some
updated results shortly on a board that can handle higher speeds). Of course each of the sticks of
memory was able to hit that speed during our tests. However, the TwinMOS got
there with the most aggressive DRAM timings of the three. The 128 MB and 256 MB Crucial memory on the other hand could only break 146MHz with the most conservative settings.
As you'll see in
the up coming benchmarks, even though both sticks of memory are PC2100, the actual
performance differences between the two is quite large... and more than I personally expected.