So this A10-7870K AMD Apu arrived today supplied from CclOnline
for £94.68 ex VAT which converts today to $149.20.
As can be seen, the base/boost speeds are 3.9GHz/4.1GHz but there is no GPU info on the packaging. The only relevant info given is collected into this montage.
So here is AMD's new flagship Apu, the A10-7870K:
At least, AMD have finally supplied a half-way decent heatsink with this APU, but it still comes with the old 70x12mm PWM fan. To save rejigging all the back plates etc. I decided to use my existing setup for the time being, which is a Scythe Mugen 4 with a 120x38mm 3500rpm NMB-Mat push fan.
After installation the Apu posted on the Asus A88X-Pro without any trouble with the usual [F1] prompt to enter the Uefi Bios in default state. The A10-7870K is recognized by the latest BIOS v.1902, but I was surprised by the high CPU voltage of 1.487V as the default setting, which makes me think that Bios 1902 is not completely set up for the A10-7870K.
There were no problems booting into W8.1 and AI Suite 3 agreed with the Voltage/Temperature readings of Uefi Bios. When I attempted the auto overclock I was offered a 4.2GHz OC, slightly in advance of the 4.1GHz OC initially offered last year for the A10-7850K.
With all this preamble out of the the way I set off to see if I could finally get back into the 5GHz Club, so I re-entered the BIOS, set AI Tweaker/Tuner and /CPU Voltage to Manual and disabled Power Now, CPB Mode, C6 Mode and APM Mode in Advanced/CPU Configurations, rebooted into W8.1 and entered the TPU settiing screen in AI Suite 3.
First of all, the 7870K runs happily off lower voltages than the default 1.487V for 3.9GHz and I was able to run 3.9GHz from below 1.2V. I tested 4.0GHz and 4.1GHz at 1.2V without problems, but crashed at 4.2GHz, which required 1.3V to run. I didn't try any intermediate voltages so this is only a rough dividing line.
Rather than sticking with multiples of 100, which CPUZ always used to reduce by a few hertz, just to make you miss a GHz target, I planned my 4.5GHz-4.9Ghz series using clearance multiples (43x105=4515, 44x105=4620, 44x107=4708, 45x107=4815, 45x109=4905). The first three worked fine: 4.515GHz=1.43125V, 4.620GHz=1.45V and 4.708GHz=1.475V; but 4.815GHz crashed with voltage raised to 1.5375V, even with the LLC settings set to extreme, so my 'Hello Boys, I'm Back' poster will have to stay unposted and I will have to leave off testing this chip any further until Asus update the BIOS and/or someone lets us know what the upper limit for CPU voltage is.
Anyway, here's a 4.7GHz CPUZ validation to show for the arrival of the A10-7870K AMD Apu (see that 33 KHz they stole off me!).
After 4 weeks since I started the thread I've put together this index of the more informative posts for people trying to get an early glimpse of the A10-7870K.
The Stilt has given the industry's view of the 'Godavari' Apus in an important set of posts:Post 63
: On overclocking with Godavari ApusPost 72
: On Load Line settingsPost 82
: 3GHz throttling on the 7870K - definitive answerPost 98
: Dual graphics benches
Two subjects have dominated recent posts:Post 117
onwards: Issue of different motherboard VRMs leading to skewed review resultsPost 125
onwards: Drmrlord and SpeedyVT About HSA and OpenCL
As someone with an early A10-7870K I have also contributed some results:Post 41
: AmdMsrTweaker screenshots giving default P-State readings of 4 flagship Apus(A10-5800K/6800K/7850K/7870K)Post 45
: Voltage tables for 4 flagship Apus giving lowest voltages needed to run P95 at a range of frequencies.Post 85
: Benches in 3DMark, PCmark7, Cinebench and Luxmark v2.0 at 3900MHz and a 4600MHz gaming overclock with a guide on how to set it.Post 150
: Dual graphics test to show an R9-270X and the A10-7870K iGPU working together in OpenCL.