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AMD Kaveri A10-7850K Overclock Guide - Page 38

post #371 of 1332
I even went back to Windows 7
http://www.3dmark.com/fs/1810027
http://www.3dmark.com/fs/1809968
http://www.3dmark.com/fs/1809870

This one is with a 260x
http://www.3dmark.com/fs/1805116
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post #372 of 1332
Looks like you're using the Extreme preset, my scores are with the Basic version, default settings. That's going to be the big difference in points I bet.

There's also a difference in memory speed, DDR3-1600 compared to 2400. Not sure that allocating 2Gb to the iGPU instead of just 1Gb benefits much at these speeds either. If you plan to use the 260X then that's not an issue anyway.
post #373 of 1332
Thought you'd find these results interesting. All Fire Strike runs used the same system settings other than specified memory changes.

1Gb UMA DDR3-1600 9 - 9 - 9 | 1394
1Gb UMA DDR3-2400 11-13-13 | 1631
2Gb UMA DDR3-2400 11-13-13 | 1621
post #374 of 1332
What is the best GPU to pair with a 7700K ? (mostly CAD and PS work). smile.gif
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post #375 of 1332
There's probably not much of any benefit past 512MB, maybe less. The only time you'll see performance scaling with more VRAM dedicated will be while using settings that wouldn't be "playable" regardless.
     
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post #376 of 1332
Quote:
Originally Posted by drnilly007 View Post

I have started mining on the gpu side of the 7850k. I have a dedicated gpu and since there are no dual graphics I might as well use up tech that's built in.

You have to make sure the igpu driver is installed. I initially installed the driver with the dgpu and it would only recognize the igpu as a Generic video controller.

Pretty cool I have no idea what hashrates mean or if it is low or not but I can guess its not very much but at least its being used.
Serious miners measure power consumption and tweak voltages (underclock) to get the most economical balance.

I just set up a mining rig. Up here in Canada the cheapest Kaveri chip is just north of $200. I instead went for a dated A10-5800K for my litecoin mining experiment as it was over $100 less. (Eventually it'll be turned into an HTPC. thumb.gif )

There's no voltage options in my board's BIOS, but I underclocked it to 2.0ghz and 300mhz on the CPU/iGP - slow, but still fast enough to handle any video stuff tossed at it. In the meantime the whole setup draws about 32 watts from the wall. smile.gif Well, until I added an R9 290 - then it's 360 watts from the wall. Gets about 820khashes/sec. (I may be able to tweak/improve that further.)

If you've got a kill-a-watt, check what your CPU is drawing and figure out if it's economical. If it's drawing 150 watts for 100khash, you're probably spending money rather than making it.


Hey, since the GPUs on these 7850K's are bandwidth starved, how low can you clock them without impacting performance significantly? I'm wondering if the 30x throttle can be defeated by underclocking the IGP?
     
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post #377 of 1332
I thought I'd share some results/thoughts from my recent Dual Graphics build. I've really been looking forward to this iteration of Dual Graphics for well over a year now. After assembling all the parts for a performance mini-ATX build, I've flashed GPU using the latest BIOS, motherboard to the latest beta BIOS, and using the Catalyst 14.2 Beta 1.3 driver. I spent a few days testing.

APU: A10-7850K
Motherboard: GIgabyte F2A88XM-D3H
Graphics Card: Gigabyte R7 250 1GB DDR5
Memory: 2x4GB G.Skill Sniper PC19200
Cooling: CoolerMaster Hyper212 EVO w/2x Corsair SP120 High Performance fans
Case: Silverstone Temjin TJ08B-E

Memory/Northbridge Overclock
Enabling the X.M.P. Profile was necessary to get my RAM to run properly at 2400MHz. The system would crash otherwise. On the plus side you don't have to do any memory settings other than clicking enable.
I could set the Northbridge from 1800 to 2000MHz, but the system wouldn't boot any higher than that. I would recommend doing this as the extra bandwidth gained about 10 FPS in 3DMark's Cloud Gate test.

IGP Overclock
Overclocking the IGP was the 2nd easiest task. I could clock it up to 1050MHz safely, but it wouldn't go any higher until I hit the sweet spot of 1108MHz in the BIOS. At that point the clock would go over, but the graphics driver would become unstable and crash. That reason being that the Gigabyte GPU is factory OC'd to 1100MHz, so the Dual Graphics specs need to match.

CPU Overclock
As many people know, the power consumption starts goes through the roof at 4.4 GHz.

4.4GHz - +.054
4.5GHz - +.114
4.6GHz - +.198 (stable)
4.7GHz - +.270 (no load)

I didn't want to push the clock any higher without proper temperature readings, as I was hovering close to 80 according to (flawed) HWiNFO and around 70 on EasyTune.
For testing purposes, I stayed at the stable clock of 4.6, but I'll likely drop to 4.5 because I want a quieter case. I don't have PWM fans, so they blow full speed at 2220 RPM until I get my fan controller off eBay.

3DMark Resuls
Dual Graphics ON Dual Graphics OFF IGP Only

Ice Storm
Graphics 129504 Graphics 124755 Graphics 83739
Physics 44797 Physics 44679 Physics 42469
Combined 91187 Combined 89220 Combined 68867

Cloud Gate
Graphics 23030 Graphics 15905 Graphics 12288
Physics 3752 Physics 3805 Physics 3779
Combined 10752 Combined 9319 Combined 8189

Fire Strike
Graphics 2954 Graphics 2203 Graphics 1851
Physics 5306 Physics 5352 Physics 5355
Combined 2327 Combined 2052 Combined 1709

Observations and Conclusions

As mentioned in Tom's Hardware's review of A10-7850's Dual Graphics, the dropped frames were very much apparent in the Fire Strike Combined Test, and truly looked much worse than tests with Dual Graphics OFF/IGP Only despite the higher score. Everything looks bad in that test however.

I'm sure if the R7 250 core clock can be pushed higher, the IGP core could be also be raised in a Dual Graphics setup. That'll have to wait for next time.

I really want to bring the Northbridge frequency up to par with my memory. If anyone has any tips for reaching 2100MHz or higher, please message me.

I think the most important thing to take away from this is, if you're looking for a cheap way to make a high-end gaming rig, you're going to be disappointed. With that said, with Dual Graphics you get a well-priced mid-range PC, Mantle, and future-proofing for HUMA and HSA. That's a pretty good deal. Some really high scores on 3DMark use this chip with the 290X. Trading up to a R9 290, 290X or whatever the future may bring is where you can rest assured that you can upgrade a year from now, and still have something top of the line if you desire.
post #378 of 1332
Gotta say nice work. I was thinking of pairing up my 7850K in dual graphics but spending the extra cash on a 250 doesn't really have me chomping at the bit after your analysis. I'll probably just pop in my ole' 6770 in the meantime for extra umph until drivers and support get there.

Have any benches on games by chance? Tomb Raider/Bioshock Infinite bench? Even subjective ones?
post #379 of 1332
Quote:
Originally Posted by FunkZ View Post

Use the beta BIOS, you'll likely be able to run the XMP profile for 2400.
Quote:
Originally Posted by FunkZ View Post

Use the beta BIOS, you'll likely be able to run the XMP profile for 2400.

I updated my BIOS as suggested and tried using XMP but windows crashes shortly after getting to the desktop. I tried upping the NB voltage to +.102 but it didn't help. What other settings do I need to change to run at 2400 (using XMP or not)
post #380 of 1332
Quote:
Originally Posted by aargos View Post

I updated my BIOS as suggested and tried using XMP but windows crashes shortly after getting to the desktop. I tried upping the NB voltage to +.102 but it didn't help. What other settings do I need to change to run at 2400 (using XMP or not)
Check there are no manual settings still residing in BIOS from your previous 2133 tweaking, particularly the timings, although I would think the latest BIOS flash would have reverted everything to defaults. Verify in the M.I.T. status they are using what they're rated for.

Other than that, not sure. The latest beta BIOS release on my (and others) Gigabyte boards allowed use of 2400 XMP profile without adjusting anything else.
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