Overclock.net › Forums › AMD › AMD CPUs › A10 5800k Dual Graphics or High Memory Speed
New Posts  All Forums:Forum Nav:

A10 5800k Dual Graphics or High Memory Speed

post #1 of 9
Thread Starter 
hey guys, im building a cheap gaming rig for a friend and am tossing up between installing a HD 6670, or 8GB of 1866mhz RAM. i already have 8GB of 1600mhz RAM spare, but should i opt for 1866 and not dual graphics, or dual graphics with 1600 RAM. btw the 6670 is the 2gb ddr3 version.
post #2 of 9
Crossfire hands down, there will be literally no difference between the ram.
post #3 of 9
Oooooh ... good question.

Personally, I would probably go for dual-graphics and 1600 mhz RAM. They're both easy upgrades in future if you want, so not a huge deal.

I don't have experience with these APU's personally, but I imagine if gaming is the focus then dual-graphics would bring higher fps. I know that fast RAM brings about much higher increases in processing, and it will increase performance in the APU's onboard GPU, but I think you really want to aim for 2400mhz RAM to get the max increase, if I've read reviews correctly.

Crossfire may bring some issues, but the new drivers are coming and I imagine things will be pretty awesome with dual GPU's. Let us all know what you decide and how it performs, whatever your choose.
post #4 of 9
If you use crossfire, then it uses the memory from the GPU.

Not everything works with the APU/dedicated crossfire though, as I recall. *edit* I guess the faster RAM would be for if the crossfire didn't work correctly.

Also this RAM is super fast, and as cheap as 1866(not the g.skill on 10% discount though)


2x4gb, 8gb, 2400mhz, $70
http://www.newegg.com/Product/Product.aspx?Item=N82E16820313323
My Rig
(5 items)
 
  
CPUMotherboardGraphicsRAM
A8-5600k BIOSTAR Hi-Fi A85S3 FM2 HD 7560D Integrated GPU Team Vulcan 8GB (2 x 4GB) DDR3 1600 
Hard Drive
TOSHIBA P300 HDWD110XZSTA 1TB 7200 RPM 64MB Cache 
  hide details  
Reply
My Rig
(5 items)
 
  
CPUMotherboardGraphicsRAM
A8-5600k BIOSTAR Hi-Fi A85S3 FM2 HD 7560D Integrated GPU Team Vulcan 8GB (2 x 4GB) DDR3 1600 
Hard Drive
TOSHIBA P300 HDWD110XZSTA 1TB 7200 RPM 64MB Cache 
  hide details  
Reply
post #5 of 9
Quote:
Originally Posted by TheLawIX View Post

Crossfire hands down, there will be literally no difference between the ram.

http://www.legitreviews.com/article/2106/6/

http://hexus.net/tech/reviews/cpu/46073-amd-a10-5800k-trinity-needs-faster-ram/?page=3

Yeah ... that's some pretty big differences in RAM speed
post #6 of 9
Quote:
Originally Posted by Alanim View Post

If you use crossfire, then it uses the memory from the GPU.

Not everything works with the APU/dedicated crossfire though, as I recall. *edit* I guess the faster RAM would be for if the crossfire didn't work correctly.

Interesting. That's something I didn't know re: GPU memory in crossfire with an APU.

Yeah, APU crossfire has even more troubles than regular crossfire apparently. It seems like so much tinkering fun though! biggrin.gif
post #7 of 9
I didn't realize APU's relied on system memory that heavily. It's totally different for Intel CPUs. I thought APU's supported strictly unified memory anyway. Regardless, I thought that the introduction of a discrete card would eliminate the need to higher frequency system memory.
Edited by TheLawIX - 5/25/13 at 11:39pm
post #8 of 9
Quote:
Originally Posted by TheLawIX View Post

I didn't realize APU's relied on system memory that heavily. It's totally different for Intel CPUs. I thought APU's supported strictly unified memory anyway. Regardless, I thought that the introduction of a discrete card would eliminate the need to higher frequency system memory.

Kaveri/Temash/Kabini have unified memory, as I recall.

AMD APU's are currently held back by RAM speeds, and as I recall even the hd4000 series/future Intel APU's are also held back by the memory bandwidth.(not as much for the HD4000 series, since they're right at the threshold).
My Rig
(5 items)
 
  
CPUMotherboardGraphicsRAM
A8-5600k BIOSTAR Hi-Fi A85S3 FM2 HD 7560D Integrated GPU Team Vulcan 8GB (2 x 4GB) DDR3 1600 
Hard Drive
TOSHIBA P300 HDWD110XZSTA 1TB 7200 RPM 64MB Cache 
  hide details  
Reply
My Rig
(5 items)
 
  
CPUMotherboardGraphicsRAM
A8-5600k BIOSTAR Hi-Fi A85S3 FM2 HD 7560D Integrated GPU Team Vulcan 8GB (2 x 4GB) DDR3 1600 
Hard Drive
TOSHIBA P300 HDWD110XZSTA 1TB 7200 RPM 64MB Cache 
  hide details  
Reply
post #9 of 9
Quote:
Originally Posted by TheLawIX View Post

I didn't realize APU's relied on system memory that heavily.

Regardless, I thought that the introduction of a discrete card would eliminate the need to higher frequency system memory.

I thought the opposite initially, but Alanim above said that the APU and discrete GPU share the VRAM of the discrete card when in crossfire, which makes sense when you think about it, freeing up the system RAM solely for processing.

Still, the benefits to higher system RAM exists in other areas, but it looks like we're all in agreement that a discrete GPU for crossfire and 1600mhz RAM is the better option thumb.gif
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › A10 5800k Dual Graphics or High Memory Speed