is cpu-z broken or my computer?

[trinitynzxt]

I just got an HP Z230 Workstation with an Intel i7 4790, 24gb DDR3 1600mhz.

In CPU-Z its showing my RAM speed at 800mhz and my CPU hasn't moved above 3.79ghz and the cpu is folding right now so its maxed out. Shouldn't it be turbo to 4ghz and whats with my ram running at half the speed?

 

[tachybana]

800mhz x 2 = 1600mhz (that should be good)
and the turbo is for when you really really need it (it auto and the pc kicks it up when it thinks it needs it)

and by the way.... that is a lot of ram you got there. watcha modeling?

 

[k1114]

Ddr stands for double data rate. The speed cpuz shows is the actual. 1600 is the effective. Turbo speed is dependent on how many cores are being used. For you it's
1 core - 4ghz
2 cores - 3.9
3/4 cores - 3.8

 

[trinitynzxt]

well my cpu is currently running Fryrender and all 8 cores are at 100% and the thing is still only at 3790.95mhz or 3.79ghz and not 4.0ghz im not sure what more would be needed to trigger a x39 or x40 multiplier.

 

[ShadyHamster]

You need to check the memory tab to check out the actual memory speed (double the reading for actual speed).
You won't get full turbo speeds while all threads are maxed out. The more cores/thread being used the lower the turbo frequency.

 

[VincentP]

Unfortunately DDR-1600 memory is often advertised as "1600MHz". This is not the case.
DDR transfers on the up edge and down edge of the clock, so 1600MT/s memory runs at 800MHz.
800MHz is perfectly normal for your memory.

On the CPU speed, you won't see the full boost speeds when consistently running all four cores. The CPU frequency is boosted when the CPU is under its thermal ceiling, which is normal if using less cores.
The base frequency of your processor is 3.6GHz, so it is doing a pretty good job getting to 3.79GHz with all four cores loaded.

 

[bmacsys]

well my cpu is currently running Fryrender and all 8 cores are at 100% and the thing is still only at 3790.95mhz or 3.79ghz and not 4.0ghz im not sure what more would be needed to trigger a x39 or x40 multiplier.

Turbo, whether AMD or Intel only uses half the cores. It is meant for lightly threaded workloads. When all cores are being used like if you are running Prime95 your cpu won't go into turbo mode.

 

[k1114]

Intel turbo does not use only half the cores. His base speed is 3.6 so even with all cores it's still higher at 3.8. Btw you don't have 8 cores, it's 4 cores, 8 threads.