Got a tech question for you Raja, thought maybe asking Elmor and Nick about it also.
vCore...
VIII series across the range are reasonably consistent with vcore required for 'x' freq, however compared to another board in particular (small/yellow) chips are requiring roughly 50mv on average more than that other board. Obviously taking reading from the board and not SW (cap of vCore rail). Also noted was the other board gave consistently higher temp readings for same applied vCore. Only a couple of degrees when running lowest vCore for required clock but when the vCore delta is added to the other board to match voltages temps are considerably higher. (adding the 50mv delta to make both the same vCore regardless of freq. stability)
Can you explain the theory behind how this is possible? Is this due to the other board having higher leakage and using more amps?
And on a side note, a chip I tested ran R15 5g@1.25v LLC6 on Hero Alpha. That same chip ran R15 5g@1.23 LLC5 on an M8E. Ambient the same for both. Any reason?
vCore...
VIII series across the range are reasonably consistent with vcore required for 'x' freq, however compared to another board in particular (small/yellow) chips are requiring roughly 50mv on average more than that other board. Obviously taking reading from the board and not SW (cap of vCore rail). Also noted was the other board gave consistently higher temp readings for same applied vCore. Only a couple of degrees when running lowest vCore for required clock but when the vCore delta is added to the other board to match voltages temps are considerably higher. (adding the 50mv delta to make both the same vCore regardless of freq. stability)
Can you explain the theory behind how this is possible? Is this due to the other board having higher leakage and using more amps?
And on a side note, a chip I tested ran R15 5g@1.25v LLC6 on Hero Alpha. That same chip ran R15 5g@1.23 LLC5 on an M8E. Ambient the same for both. Any reason?
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And I still can't get a direct answer as to why the difference. Simple question, is it theoretically possible? Yes or no?
Would be good if you could. Seems to be a bit unexplained within the community. Pretty sure you know what the 'other board' is....
Look forward to hearing back from you on this one.
Look forward to hearing back from you on this one.
Feel free to pm me as it sounds like you have an idea why this happens. Just looking for theoretical knowledge...
Community being those who OC. Big discussion about it on one of ze German forums. 😉
Even if that were true arne it doesn't explain a 50mv difference between them for same freq...
Community being those who OC. Big discussion about it on one of ze German forums. 😉
Even if that were true arne it doesn't explain a 50mv difference between them for same freq...
Haha, I'm on my 3rd!
Heat at same freq using minimum vcore required, so roughly 50mv delta, is near enough the same. Just a degree or two different. If you set them both at the same vcore on dmm then yellow is significantly higher temp.
That's what makes me question the true voltage on each board.
Plus in a lab environment x cpu is going to require y voltage/current/power etc etc to runderstand at z freq. Maybe that would change due to the quality of the supply? Ripple etc etc?
There's massive speculation in the oc community about the difference in vcore but neither manufacturer seems willing to post any theory / reasoning behind it. It is what it is but an explanation from the educated as to why would be nice.
Heat at same freq using minimum vcore required, so roughly 50mv delta, is near enough the same. Just a degree or two different. If you set them both at the same vcore on dmm then yellow is significantly higher temp.
That's what makes me question the true voltage on each board.
Plus in a lab environment x cpu is going to require y voltage/current/power etc etc to runderstand at z freq. Maybe that would change due to the quality of the supply? Ripple etc etc?
There's massive speculation in the oc community about the difference in vcore but neither manufacturer seems willing to post any theory / reasoning behind it. It is what it is but an explanation from the educated as to why would be nice.
I'll simplify...
Test used, frequency, ambient and cooling same for both. Vcore taken directly from board with DMM. (Software shows the same fyi)
Red team - 1.31vcore 60deg
Yellow team - 1.25vcore 60deg
Theoretically possible or not? If so, how?
Test used, frequency, ambient and cooling same for both. Vcore taken directly from board with DMM. (Software shows the same fyi)
Red team - 1.31vcore 60deg
Yellow team - 1.25vcore 60deg
Theoretically possible or not? If so, how?
