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PCIE frequency

Post Date: 2010-04-30
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neilkaz View Drop Down
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Posts: 156 		  Quote neilkaz Quote  Post ReplyReply bullet Topic: PCIE frequency
    Posted: 30 Apr 2010 at 11:28am

There are quite a few places online that recommend keeping this at 100 MHz and others that say it is OK to raise to 105 but never above 110 MHz.

When Justin advised me on tweaking the overclock of my budget i7-920 DS system (GTX 275 graphics card), his recommended BIOS had me raise PCIE to 105 MHz.
 
Recently I set it back to 100 MHz and noted that this (I presume only slightly overclocked graphics card (was a free special from DS) was chugging a bit and choppy when playing games. I don't play anything that is hard core for the graphics card. I set PCIE back to 105 and no issues and repeated the test and again things are clearly better at 105 than at 100 MHz.
 
I'll keep it 105 .. neilkaz ..
HAF932
i7-980X at 4.34 Ghz HT 24/7
GTX 275
6 MB STT DDR3 at 1628 MHz
Stage 4 cooling
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justin.kerr View Drop Down
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Posts: 5084 		  Quote justin.kerr Quote  Post ReplyReply bullet Posted: 30 Apr 2010 at 11:58am
every device is different, they can only handle  the PCIe being overclocked so much, some will run up to 125-130Mhz, most everything will run at 105Mhz. for hard drive benchmarking even 110 shows a nice improvement, if the hard drives can handle it. lol
I raise it because it is tied with the CPU, and allows higher overclocks, plus a few other benefits, but it should have no impact on the GTX 275.
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neilkaz View Drop Down
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Posts: 156 		  Quote neilkaz Quote  Post ReplyReply bullet Posted: 30 Apr 2010 at 1:32pm
Thx for the info, Justin. I left PCIE alone for my 4.4 GHz 24/7 OC for the 980x system with the GTX 295 and note that everything runs perfectly then, but that graphics card is not OC'd.
HAF932
i7-980X at 4.34 Ghz HT 24/7
GTX 275
6 MB STT DDR3 at 1628 MHz
Stage 4 cooling
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<8) slunK parade View Drop Down
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Posts: 798 		  Quote <8) slunK parade Quote  Post ReplyReply bullet Posted: 03 May 2010 at 9:12pm
just an off topic question
why shell out so much money on a beast processor, then settle for a last generation GPU
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neilkaz View Drop Down
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Posts: 156 		  Quote neilkaz Quote  Post ReplyReply bullet Posted: 04 May 2010 at 12:43pm
Originally posted by <8) slunK parade

just an off topic question
why shell out so much money on a beast processor, then settle for a last generation GPU
 
My apps here are all number crunching and take full advantage of additional cores and HT. Any game I occasionally play is rather basic when it comes to GPU and things look just fine to me using the basic Nvidia cards.
 
That being said, when octo-cores come out and if I then upgrade again, I should spend a few hundo more for a real GPU card.
HAF932
i7-980X at 4.34 Ghz HT 24/7
GTX 275
6 MB STT DDR3 at 1628 MHz
Stage 4 cooling
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