George_o/c Posted September 13, 2011 Share Posted September 13, 2011 (edited) Hello everybody! I jumped on the Llano wagon as well and I'm quite surprised to say the least I'm currently testing an A6-3650 on a Gigabyte A75M-UD2H for a review. Everything's perfect, I've learned the system and its "tricky" spots, I've already hit 2500MHz RAM with air-cooled CPU/RAM and I was about to move to SingleStage testing @ -40*C. What's my problem? Using an 8800GT I can hit around 145MHz FSB on air-cooling, maybe a little bit more. Using the 6530D though (iGPU on A6-3650), the last stable FSB frequency is 120MHz FSB sharp, which means that GPU tops at 444MHz (stock) *+ 20% = 532MHz core clock. I've seen others on hwbot benching on air with > 140MHz FSB while still using the intergrated GPU. How is this possible? I've tried everything, from voltages and CPU/RAM multipliers to VGA RAM size, EHCI Async Data Cahce and stuff - whatever I could find @ BIOS I already tried. Can you help me out a bit? Maybe it's something I missed, I dont know... Maybe it's the fact that I use the VGA output of the UD2H and not the DVI one? I've tried PCI-Express up to 120MHz but still I can't manage to get more than 120MHz FSB using the iGPU How are these guys for example manage to hit such FSB on air-cooling with the iGPU: 1) http://hwbot.org/submission/2205735_delly_3dmark_vantage___performance_radeon_hd_6530d_4632_marks 2) http://hwbot.org/submission/2198558_xoqolatl_3dmark11___performance_radeon_hd_6530d_1169_marks 3) http://hwbot.org/submission/2198114_rebelion_3dmark11___performance_radeon_hd_6530d_1066_marks Just to clarify, I'm not questioning the above-mentioned scores. There must be some trick though for such high FSB. I find it hard that my chip's iGPU craps out at 120MHz FSB. Edited September 13, 2011 by George_o/c Quote Link to comment Share on other sites More sharing options...
|ron Posted September 13, 2011 Share Posted September 13, 2011 Yes george, for some reason when you scale with fsb above 120/125mhz, the integrated vga port goes crazy. Plug the monitor in the DVI port and it will be ok Quote Link to comment Share on other sites More sharing options...
Massman Posted September 13, 2011 Share Posted September 13, 2011 Interesting! Any technical explanation for that behavior ? Quote Link to comment Share on other sites More sharing options...
|ron Posted September 13, 2011 Share Posted September 13, 2011 (edited) Dunno, it happened first on the asus f1a75-m pro and then on the ud4h. To better explain, it's not that the system freezes: actually, if you could see what's going on, you'll notice that it's going straight through windows as a normal boot. But you loose image output to the monitor. Maybe the video signal conversion from digital to analog has something to do with that... Remaining in digital does the trick. it's the only thing I could think of p.s: oh and for the record, there are reviews around the web where they say something like "fsb overclocking is limited to around 120/125mhz, so we did our test at these frequencies"... it's not quite true Edited September 13, 2011 by |ron Quote Link to comment Share on other sites More sharing options...
George_o/c Posted September 13, 2011 Author Share Posted September 13, 2011 I knew it was the VGA port because I literally tested everything else! I'll buy a VGA to DVI-D adapter and I hope that everything turns out fine. Thanks for the quick input guys @Iron: Dont worry, I already knew that 120-125 is not the limit when iGPU is used. If I thought so, I wouldnt post this thread after all Thanks to HWBOT database as well, because I saw all these people doing crazy FSB with iGPU and I told my self: You fail again, you are doing something terribly wrong As soon as I finish my review, I'll test the A6-3650 on SS @ -40*C, and then LN2 who knows Quote Link to comment Share on other sites More sharing options...
|ron Posted September 13, 2011 Share Posted September 13, 2011 I knew it was the VGA port because I literally tested everything else! I'll buy a VGA to DVI-D adapter and I hope that everything turns out fine. Thanks for the quick input guys @Iron: Dont worry, I already knew that 120-125 is not the limit when iGPU is used. If I thought so, I wouldnt post this thread after all Thanks to HWBOT database as well, because I saw all these people doing crazy FSB with iGPU and I told my self: You fail again, you are doing something terribly wrong As soon as I finish my review, I'll test the A6-3650 on SS @ -40*C, and then LN2 who knows It's a little OT, but when I read "iGPU" I thought "Oh shit, another app for the iPhone to let the wannabe ockers raise frequencies from their apple phone" :asd: :D Quote Link to comment Share on other sites More sharing options...
George_o/c Posted September 13, 2011 Author Share Posted September 13, 2011 hahahahaha I just thought it's a cool name for intergrated GPU Quote Link to comment Share on other sites More sharing options...
George_o/c Posted November 2, 2011 Author Share Posted November 2, 2011 Just popping back after a while to confirm that the problem was indeed found in the vga output. Once I connected my monitor on the DVI-D port the weird FSB wall was crushed and I managed to hit 146MHz on air with the iGPU connected Quote Link to comment Share on other sites More sharing options...
|ron Posted November 2, 2011 Share Posted November 2, 2011 great george Glad to have been of help. Did you try it@ln2? Quote Link to comment Share on other sites More sharing options...
sin0822 Posted November 3, 2011 Share Posted November 3, 2011 yea issue persists on all boards too. Quote Link to comment Share on other sites More sharing options...
George_o/c Posted November 4, 2011 Author Share Posted November 4, 2011 (edited) great george Glad to have been of help. Did you try it@ln2? Not yet! Best scores I've managed and posted in the overclocking page of our review are: 3DMark Vantage Pefromance Preset Score on full air cooling Max FSB - 148MHz FSB Falidation Validation @ 148MHz FSB Max RAM MHz @ SuperPi 1M 2595MHz RAM Validation - Kingston HyperX H2O 2133MHz 2x2GB @ 1.68V Validation @ 2595MHz RAM Edited November 4, 2011 by George_o/c Quote Link to comment Share on other sites More sharing options...
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