My 3950x works great for what I do….but I’m having trouble wrapping my head around some data that seems non-intuitive…
I do a lot of video transcoding from ISO to MKV and in the past I’ve had an I7-5960x HEDT which I replaced six months ago with an AMD 3950x.
I tried various OC methods but never came up with anything that made sense – my baseline has comfortable power and temps and every OC would massively increase power and temps while only increasing throughput a few percent – not a good tradeoff for a machine that might run continuously for days at a time.
In any case, I’ve settled with ‘AUTO’ settings for everything other than DOCP for my RAM on my ASUS Crosshair VIII Formula motherboard. The interesting results I see (repeated multiple times) involve running a single Handbrake encode instance versus two concurrent encode instances. Also, these averages are from several to 12+ hour timeframes.
SINGLE HANDBRAKE INSTANCE
TWO CONCURRENT HANDBRAKE INSTANCES
I realize that with the single instance, voltage, temp and clock speed is increased due to lighter loading of cores – this is expected Ryzen behavior.
The part that challenges my logic is – with two instances I get:
My brain keeps saying it isn’t logical to get more work done without more power and with lower temps and voltages…
I do a lot of video transcoding from ISO to MKV and in the past I’ve had an I7-5960x HEDT which I replaced six months ago with an AMD 3950x.
I tried various OC methods but never came up with anything that made sense – my baseline has comfortable power and temps and every OC would massively increase power and temps while only increasing throughput a few percent – not a good tradeoff for a machine that might run continuously for days at a time.
In any case, I’ve settled with ‘AUTO’ settings for everything other than DOCP for my RAM on my ASUS Crosshair VIII Formula motherboard. The interesting results I see (repeated multiple times) involve running a single Handbrake encode instance versus two concurrent encode instances. Also, these averages are from several to 12+ hour timeframes.
SINGLE HANDBRAKE INSTANCE
69C - CPU Package Temp
1.250v – CPU Vcore
140w – CPU package power
4026 – CPU clock
60% - CPU utilization
TWO CONCURRENT HANDBRAKE INSTANCES
62C – CPU Package Temp
1.104v – CPU Vcore
141w – CPU package power
3832 – CPU clock
98% - CPU utilization
I realize that with the single instance, voltage, temp and clock speed is increased due to lighter loading of cores – this is expected Ryzen behavior.
The part that challenges my logic is – with two instances I get:
23% MORE work done (measured by output completed)
Lower average CPU temp
Lower average CPU voltage
Same average CPU power consumption
My brain keeps saying it isn’t logical to get more work done without more power and with lower temps and voltages…