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E7200 should show VID of ~1.12V with temp ~25°C.

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In Reply to: RE: cPlay 1.0 Final (SSSE3) Released posted by promethk on August 07, 2008 at 02:08:32

Problem may well be with mobo - check CPU voltage setting. I know from other users of recommended Gigabyte mobo that setting CPU voltage to 'Auto' causes high voltages and temperatures. Mobo manufacturers seem to favor this due to OC. Rather use manual voltages.

Thanks for the power readings. At 80% efficiency, that means 37 watts power consumption for E7200 doing 96k @ 145db SNR (40 watts at 192k). You should get this lower using Granite Digital PS, alternate USB ports and 1GB RAM. Also, make sure video settings are done as per manual (you want to disable video GPU in G33).

Very interesting to see E7200 with high VID & temp is still more power efficient (E1200 does 37 watts for 96k @ 97db SNR - foobar).

Follow Ups:

RE: E7200 should show VID of ~1.12V with temp ~25°C. - promethk 08:59:25 08/07/08 (8)
I checked again the E7200 heatsink again. This time I am brave enough to use my fingers to touch the heat-pipe near the CPU directly, while expecting a burn, I feel nothing! So the E7200 sensor is malfunctioning as some users have already indicated in the internet.

I checked the Kingston data sheets for the ram modules, the 2G that I have got is their lowest power 2G model, with only 1.975W while the corresponding 1G model is 1.872W, so the difference is only 0.1 W.

On the next build, I am considering to install windows XP, to boot and operate entirely off a USB external harddisk, based on some "hack" on various configure files of windows XP that I found on the web. This will seperate the power as well as enable direct transfer of music I ripped from my other computer.
- RE: E7200 should show VID of ~1.12V with temp ~25°C. - cics 00:14:58 08/08/08 (0)
  You could disable Thermal monitoring in BIOS - I do this as well as disable CIE function.
  
  RAM, USB stuff & ROM drive (not sure if you have one) all add load which is best when bypassed. Those few watts do add up. It would be interesting to see what power measures you get with this and VID at 1.12V. Any chance of using the Gigabyte mobo?
  
  Avoid USB mobo connection - measurements that I was doing for jitter showed 3db noise floor increase when USB component is connected.
- RE: E7200 should show VID of ~1.12V with temp ~25°C. - ninekit 19:16:21 08/07/08 (6)
  Set to lowest core voltage, may I ask can you run 145db SRC @ 96k with e7200 passively cooled stock heatsink?
  
  Thanks
  - RE: E7200 should show VID of ~1.12V with temp ~25°C. - promethk 00:39:48 08/08/08 (4)
    Well for my setup, it is not possible. But noting that different E7200 could have different default VID and mine is higher than the value posted here.
    
    My current motherboard is not flexible in voltage setting and the voltage is 1.2V. But my guess is that it is not possible because the stock intel heatsink is not very efficient, no copper and no heatpipe, very little fin for airflow. And the stock intel heatsink with fan off feels very hot. The increase in temp. will cause a rise in (dynamic) resistance, making the processor draws more power.
    
    With a cheap and tall aftermarket heatsink with copper heatpipe for passive cooling, the situation improves a lot so that heat will no longer be problem even with 192kHz processing.
    - Check your Power Options setting (it must be Max Battery and not Home Office/Desktop). - cics 23:34:37 08/10/08 (3)
      Sometimes XP doesn't take the setting and must be redone. With Max Battery power scheme, VID must be lower than normal.
      - Order of cmp build - theob 10:45:18 08/11/08 (2)
        
        In Reply to: RE: Check your Power Options setting (it must be Max Battery and not Home Office/Desktop). posted by cics on August 10, 2008 at 23:34:37
        
        Dear Cics, when one is building a cmp from 'scratch or the ground up' should one do the hardware set up in
        
        http://www.audioasylum.com/forums/pcaudio/messages/3/33137.html
        
        first then do the Bios and Power set up from CMP documentation 'The art of Building a computer transport' second or vice versa? Or should it be simultaneous?
        
        Only do BIOS setup as per post - AOB refers to Biostar mobo. - cics 12:34:45 08/11/08 (1)
        
        In Reply to: RE: Order of cmp build posted by theob on August 11, 2008 at 10:45:18
        
        Power setup is as per AOB.
        
        RE: Only do BIOS setup as per post - AOB refers to Biostar mobo. - theob 16:01:04 08/11/08 (0)
        
        In Reply to: RE: Only do BIOS setup as per post - AOB refers to Biostar mobo. posted by cics on August 11, 2008 at 12:34:45
        
        thanks
  - Yes, 145db SRC @ 96k with e7200 passively cooled is not a problem. - cics 00:19:03 08/08/08 (0)
    You can do this for all Core 2 Duo processors as long as passive cooling is good - no need to go overboard.
    
    My E6300 does 145db SRC @ 192k with passive cooling. Temp is ~65°C using Thermaltake heatsink. E7200 does ~25°C with Zalman case.

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