DFI UT-P45-T2RS low voltage overclock.

PolRoger · Nov 12, 2008

I've been testing this motherboard and I found out it will do 500fsb DDR2-1200 with the (5/6) 333/800 divider at near default voltages. These settings would make for a nice moderate 24/7 type overclock. I'm using 4 sticks of HyperX (D9GKX).

jason4207 · Nov 12, 2008

Can you tighten up that Performance Level at all?

Why not up the multi to 8.5 or 9 and shoot for a higher CPU OC?

Good work so far BTW!

:beer:

PolRoger · Nov 13, 2008

jason4207:

PL of 7 doesn't work at these settings. The low voltage "default type" settings seem only to work with as high a multi as your cpu will run at close to stock VID. My 1.25 VID chip shows 1.20v in BIOS at default which works when using the 7 multi. When I use the 8 multi I need a little more vcore to pass Prime/OCCT so I set vcore to 1.25v which shows 1.21v BIOS and 1.21/1.23 with CPUZ. Under load with vdroop it drops to 1.19/1.20v. To get my chip stable with the 8.5 multi my chip seems to need about 1.29v showing in BIOS and the balance between VTT/MCH/GTL is broken. I've been working at it... but I expect the UT will require a more normal overclocking voltage setup to acheive stability at higher multipliers.

jason4207 · Nov 13, 2008

Have you exhausted your RAM timing tweaks? I'm running some D9's that run these timings all the way up to 1250 at 2.3v. Of course, I doubt it was 24/7 stable. I still think you might be able to tighten up a couple things, though, if you're into RAM tweaking that is.

5-5-5-4-10 4-35-6-11-11-3-8-3-4

This is 1185 at the same timings and less voltage (2.2-2.25v...don't remember).

This is what I run 24/7, though...actually I've dropped it down to 3.9GHz (460FSB) to give me some stability-cushion. It seems impossible to get the RAM completely stable using anything but 1:1 when the FSB is being pushed to the limit w/ these quads.

PolRoger · Nov 14, 2008

jason4207: I have not fully tweaked my timings yet... still testing various overclocks, straps and dividers. I had to switch out my cpu and with a few adjustments my older E8400-C0 (1.15 VID) can do the same 500fsb/DDR2-1200 with the 7.5 multi. I'll have to see if I can get the 8x stable. Thanks for sharing the timings I'll reference them and try them out.

redduc900 · Nov 14, 2008

Very nice OC there Pol w/ 4 x 1GB sticks at 1200 MHz (5:6; 333/800), 1.93 Vdimm, PL of 8 and 5-5-5-15. I wish my 2 x 2GB sticks of 9200 could do that, unfortunately the best they will do is 1196 MHz at 5-5-5-15 and 2.1V. Your RAM sub-timings look real good too, especially the tRFC of 38... very impressive.

PolRoger · Nov 14, 2008

redduc900 said:
Very nice OC there Pol w/ 4 x 1GB sticks at 1200 MHz (5:6; 333/800), 1.93 Vdimm, PL of 8 and 5-5-5-15. I wish my 2 x 2GB sticks of 9200 could do that, unfortunately the best they will do is 1196 MHz at 5-5-5-15 and 2.1V. Your RAM sub-timings look real good too, especially the tRFC of 38... very impressive.

Practically 1200 with a 4GB kit! The best I've managed so far with my 4GB kit of OCZ PC2-8500 is 8.5x470 DDR2-1129 at 1.95v.

DFI UT-P45-T2RS low voltage overclock.

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