AMD a10-7890k dual graphics?
- Thread starter Hexsavior
- Start date
Solution
DonkeyOatie
Champion
- Sep 16, 2014
- 12,141
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Yes (See here : http://products.amd.com/en-us/search/APU/AMD-A-Series-Processors/AMD-A10-Series-APU-for-Desktops/A10-7890K-with-Radeon™-R7-Graphics-and-Wraith-cooler/186)
The R7 250 is the most powerful card that will run reasonably well.
I would not follow this path unless I had to.
A discrete card for $100 will outperform dual graphics and run almost every game. better.
The best Discrete Graphics Card which can used in Dual Graphics with the A10-7870k is the R7 250.
The thing to remember about Dual Graphics (and CrossFire) is that both GPU's have to be running at the same speed for it to work correctly. This means that both cards will only be able to utilize the running power of the lowest end card. On a basic level this means that a higher end card has to "slow" itself down to match the speed of the lower end one. This is not something which can be overcome with "drivers" or "firmware updates" it is a requirement of the technology itself.
As such, when you check the specifications of the A10-7870k you will see that it only has up to 512 Stream Pipelines (Cores) and these are run at around 866MHz. Also APU's must utilize your Systems installed DRR3 RAM which is slower then "dedicated" GDDR5 RAM which a Discrete Graphics Card would use. Now if you were to use the Discrete Graphics Card R7 250 in Dual Graphics with the A10-7870k you would end up getting higher performance then only using one of those cards by itself. But if you were to use a R7 250X or higher card the overall performance of a single card would out-pace that same card run in "Dual Graphics" with the A10-7870k.
Also please remember that Dual Graphics (and CrossFire) only are enabled in compatible games, while playing in Full Screen Mode. As such a single card, higher then the R7 250, would be a better choice overall, if you are looking for performance. The HD 7950 has 1792 Stream Pipelines and normally comes with 2-3 GBs of GDDR5 memory. As such, this card by itself would far out perform any APU + Discrete Graphics Card setup.
The same applies to the more faster A10-7890K
The R7 250 is the most powerful card that will run reasonably well.
I would not follow this path unless I had to.
A discrete card for $100 will outperform dual graphics and run almost every game. better.
The best Discrete Graphics Card which can used in Dual Graphics with the A10-7870k is the R7 250.
The thing to remember about Dual Graphics (and CrossFire) is that both GPU's have to be running at the same speed for it to work correctly. This means that both cards will only be able to utilize the running power of the lowest end card. On a basic level this means that a higher end card has to "slow" itself down to match the speed of the lower end one. This is not something which can be overcome with "drivers" or "firmware updates" it is a requirement of the technology itself.
As such, when you check the specifications of the A10-7870k you will see that it only has up to 512 Stream Pipelines (Cores) and these are run at around 866MHz. Also APU's must utilize your Systems installed DRR3 RAM which is slower then "dedicated" GDDR5 RAM which a Discrete Graphics Card would use. Now if you were to use the Discrete Graphics Card R7 250 in Dual Graphics with the A10-7870k you would end up getting higher performance then only using one of those cards by itself. But if you were to use a R7 250X or higher card the overall performance of a single card would out-pace that same card run in "Dual Graphics" with the A10-7870k.
Also please remember that Dual Graphics (and CrossFire) only are enabled in compatible games, while playing in Full Screen Mode. As such a single card, higher then the R7 250, would be a better choice overall, if you are looking for performance. The HD 7950 has 1792 Stream Pipelines and normally comes with 2-3 GBs of GDDR5 memory. As such, this card by itself would far out perform any APU + Discrete Graphics Card setup.
The same applies to the more faster A10-7890K
DonkeyOatie
Champion
- Sep 16, 2014
- 12,141
- 1
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Read this: http://www.techspot.com/review/781-amd-a10-7850k-graphics-performance/
This 370 http://www.newegg.com/Product/Product.aspx?Item=N82E16814131670&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= after rebate. or almost any R7 360.
This 370 http://www.newegg.com/Product/Product.aspx?Item=N82E16814131670&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-PCPartPicker,%20LLC-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID= after rebate. or almost any R7 360.
keitholsen
Commendable
- Jul 18, 2016
- 7
- 0
- 1,510
like everyone has said only R7-250, I just bought a A10-7890k and a XFXR7-360 and I thought it would run dual graphics, "No chance", I was better off with the XFX from Best Buy comes in at 1100MHz base clock, even though I didn't build this system for gaming, I put GTA V in for my son, and we used the game benchmark at default settings and still got 45-55 fps, which he thinks it plays much nicer than his Xbox360. I'm 57 yrs.old, this system I built 3 wks.ago is my very first pc ever, its fun, I leased a pc 5 mos.ago and learned how to build a PC watching "Awesomesauce" network.
Anthony Jan
Commendable
- Aug 20, 2016
- 3
- 0
- 1,510
I will have to DISAGREE with DonkieOatie. Dual Graphics is actually better than the R7-250 alone. There are tests done to this. Dual Graphics is up to 100% better (depending on the game) than just the stand-alone R7-250.
So here are some plans:
Low Budget Gaming Plan: Since you already have the APU, then buy the R7-250 and enable Dual Graphics. It will be cheaper of course. You'll still get a significant boost in performance. You can even play Witcher III with low-mid settings. And optionally, test the Dual Graphics at the store before purchasing it. If its performance boost didn't meet your requirements then go for the next plan.
You're Rolling in Cash: If you really want a really powerful gaming PC then buy a more expensive R9 series dedicated video card (does not support Dual Graphics) and then disable your APU's GPU (your motherboard will automatically do this). Or buy any powerful Nvidia cards out there. But this means you just wasted your money on that APU because its GPU will not be used.
Also, Dual Channel RAM is better for APU and I don't know why. That means that if you want 8Gb RAM, do not buy an 8Gb stick. It sucks for APU. Instead, buy two 4Gb RAM's. I tested this and it really improved my FPS (from 70 to 80). Also, the 8Gb RAM stick would cost more than the two 4Gb's.
So here are some plans:
Low Budget Gaming Plan: Since you already have the APU, then buy the R7-250 and enable Dual Graphics. It will be cheaper of course. You'll still get a significant boost in performance. You can even play Witcher III with low-mid settings. And optionally, test the Dual Graphics at the store before purchasing it. If its performance boost didn't meet your requirements then go for the next plan.
You're Rolling in Cash: If you really want a really powerful gaming PC then buy a more expensive R9 series dedicated video card (does not support Dual Graphics) and then disable your APU's GPU (your motherboard will automatically do this). Or buy any powerful Nvidia cards out there. But this means you just wasted your money on that APU because its GPU will not be used.
Also, Dual Channel RAM is better for APU and I don't know why. That means that if you want 8Gb RAM, do not buy an 8Gb stick. It sucks for APU. Instead, buy two 4Gb RAM's. I tested this and it really improved my FPS (from 70 to 80). Also, the 8Gb RAM stick would cost more than the two 4Gb's.
LEOKAMBOJ
Reputable
- Jul 9, 2015
- 43
- 0
- 4,540
Now i am currently getting 1024 mb of usable integrated apu memory of my 7890k. Where has the rest 1024 mb gone ?
I've seen in laptop mobile graphics whether integrated/discrete, they provide yhe exact vram as mentioned! So why m i getting half of 7890k's int. r7 240 2gb?
Secondly i wanna ask that which card should i buy (latest arrivals preferred) in order to run GTA V @1080p or 1440p (as 7890k supports virtual super resolution) at maxed out setting or at least high settings? I am really fed up of the torn-out frames currently. I am playing gta v on 7890k alone nd gettin 14fps at lowest settings @768p!! Pls suggest me the best method (that whether to use a discrete graphics card or not)?
I've seen in laptop mobile graphics whether integrated/discrete, they provide yhe exact vram as mentioned! So why m i getting half of 7890k's int. r7 240 2gb?
Secondly i wanna ask that which card should i buy (latest arrivals preferred) in order to run GTA V @1080p or 1440p (as 7890k supports virtual super resolution) at maxed out setting or at least high settings? I am really fed up of the torn-out frames currently. I am playing gta v on 7890k alone nd gettin 14fps at lowest settings @768p!! Pls suggest me the best method (that whether to use a discrete graphics card or not)?
I hope this answers some questions. I run an older dual graphics setup. However, I have built two other A10 and R7 graphics cards setup with dual graphics. When you setup in the Bios to use dual graphics you also have to select how much system ram to set aside for the GPU's (or logic cores amd term) in the APU. It ranges depending on the MB you have. The Asus MB I built with only supported 2gb and you could select 512, 1024, or 2048. So check you MB manufacturers to see what amount you can set aside. Also If you've done it right it won't show anywhere except, in well, Windows in control panel and then system under installed memory. It will read like 16.0GB (14.0GB usable) depending. Just double check with AMD also they have documentation on which cards hybrid crossfire (dual graphics) the best with which APU's.
Hybrid crossfire has nothing to do with being supported by games at all. All games that use Math and vectors use hybrid crossfire. The logic cores in the apu do the math before they are sent to the graphics card for rendering. So essentially it is helping lighten the work load on the graphics card. So games do not have to support it. I have ran this PC for 5 years. I still to this day out bench two to three pay scales higher than conventional CPU GPU combo's that do not have multiple Graphics cards. Again a discrete graphics card cannot beat this technology with slower ram or not because all the dual graphics is pre-rendering before it is sent to the graphics card. It is because of this there is NO and i repeat NO loss of performance because the APU does no rendering it only does precalucation. Its documented on the website but I think I read this in the literature associated with the APU in the box.
Again in short this is not true Crossfire or SLI it is hybrid crossfire, it does NOT split the rendering load. All it does is reduce the calculation load of the graphics card to aid in faster rendering.
Hybrid crossfire has nothing to do with being supported by games at all. All games that use Math and vectors use hybrid crossfire. The logic cores in the apu do the math before they are sent to the graphics card for rendering. So essentially it is helping lighten the work load on the graphics card. So games do not have to support it. I have ran this PC for 5 years. I still to this day out bench two to three pay scales higher than conventional CPU GPU combo's that do not have multiple Graphics cards. Again a discrete graphics card cannot beat this technology with slower ram or not because all the dual graphics is pre-rendering before it is sent to the graphics card. It is because of this there is NO and i repeat NO loss of performance because the APU does no rendering it only does precalucation. Its documented on the website but I think I read this in the literature associated with the APU in the box.
Again in short this is not true Crossfire or SLI it is hybrid crossfire, it does NOT split the rendering load. All it does is reduce the calculation load of the graphics card to aid in faster rendering.
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