Biostar T Power I45 BIOS thread

[mattkosem]

You will kill those 2x2GB DIMMs quickly above 2.2v and many of them do best at or below 2.1v. You need to set TRFC to 78 (max for the board). tWR is GTG at 6. I've yet to see a P45 that liked 1:1 with any 'normal' RAM like my P35 did (heck, my old P5W hates anything but 1:1). I seem to get best results in actual normal usage on 5:6 and 4:5 dividers.

Have you played with the clock skew? I think part of the reason TPower needs so much TRFC is lack of discrete RAM clk skew adjustments (and possibly dirty 'budget' clocks requiring brute force to hit high numbers).

I know that more than 2.2v will kill them eventually. I only tried it for 5 minutes or so, just long enough to validate the lack of improvement. The label on these dimms says 2.2v, so I'm sticking with that (or the 2.168v that I get IRL). tRFC of 78 huh? I didn't need to do that on the p35, but I can give it a shot. I slapped them on my GF's P31 mobo and am still able to run the same timings that I was able to run on the BloodIron, which includes the tRFC of 46. I had to adjust the clock skew to get my FSB stable. I'm using the settings in the first page of the unofficial tpower i45 thread currently. I'd love to run 4:5 or 5:6, but my ram isn't stable at 1250 or 1300, and I'm not interested in kicking down my FSB.

--Matt