Overclock.net › Forums › Graphics Cards › AMD/ATI › In X-fire, if one card's shaders are unlocked and it's twin arent, will the shaders for the "set" only run at the unlocked level?
New Posts  All Forums:Forum Nav:

In X-fire, if one card's shaders are unlocked and it's twin arent, will the shaders for the "set" only run at the unlocked level?

post #1 of 12
Thread Starter 
Found an awesome deal on two TFiii 6950s from an OCN member here,
http://www.overclock.net/t/1207462/msi-6950-2gb-twin-frozr-iii-pe-oc-x-2/0_100#post_16322804
anyhow, 1 unlocks, the other doesnt....how will that affect Xfire?

thx
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
post #2 of 12
it won't change anything the cards will run in crossfire just fine.
    
CPUMotherboardGraphicsRAM
i7 2600k 5000mhz(so far) ASUS MAXIMUS IV EXTREME msi 6970 and 2 6950's Mushkin Enhanced Blackline 2133mhz 
Hard DriveOptical DriveOSMonitor
Force GT(os) M4 64gb(games) f3 1tb(other) Samsung Windows 7 64bit Samsung BX2450 
KeyboardPowerCaseMouse
Black widow XFX ProSeries 1050W PSU 80+Gold  Corsair 700D Deathadder 
Mouse Pad
nope! 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 2600k 5000mhz(so far) ASUS MAXIMUS IV EXTREME msi 6970 and 2 6950's Mushkin Enhanced Blackline 2133mhz 
Hard DriveOptical DriveOSMonitor
Force GT(os) M4 64gb(games) f3 1tb(other) Samsung Windows 7 64bit Samsung BX2450 
KeyboardPowerCaseMouse
Black widow XFX ProSeries 1050W PSU 80+Gold  Corsair 700D Deathadder 
Mouse Pad
nope! 
  hide details  
Reply
post #3 of 12
Thread Starter 
What exactly do the shaders do then if one being u/l and the other not doesnt make any difference? headscratch.gif
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
post #4 of 12
its just like if you ran a 6970 with a 6950 or a 6990 with a 6950.. Botch cards just do their thing. This isn't nvidia each card isn't all up in the others business.
    
CPUMotherboardGraphicsRAM
i7 2600k 5000mhz(so far) ASUS MAXIMUS IV EXTREME msi 6970 and 2 6950's Mushkin Enhanced Blackline 2133mhz 
Hard DriveOptical DriveOSMonitor
Force GT(os) M4 64gb(games) f3 1tb(other) Samsung Windows 7 64bit Samsung BX2450 
KeyboardPowerCaseMouse
Black widow XFX ProSeries 1050W PSU 80+Gold  Corsair 700D Deathadder 
Mouse Pad
nope! 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7 2600k 5000mhz(so far) ASUS MAXIMUS IV EXTREME msi 6970 and 2 6950's Mushkin Enhanced Blackline 2133mhz 
Hard DriveOptical DriveOSMonitor
Force GT(os) M4 64gb(games) f3 1tb(other) Samsung Windows 7 64bit Samsung BX2450 
KeyboardPowerCaseMouse
Black widow XFX ProSeries 1050W PSU 80+Gold  Corsair 700D Deathadder 
Mouse Pad
nope! 
  hide details  
Reply
post #5 of 12
Thread Starter 
Quote:
Originally Posted by microman View Post

its just like if you ran a 6970 with a 6950 or a 6990 with a 6950.. Botch cards just do their thing. This isn't nvidia each card isn't all up in the others business.

In the case of X-fire w/ a 70 & a 50, i thought the "set" would only run as fast as the slowest card, since their clock speeds are different. I then further assumed that this would apply to shaders as well. I've a lot to learn about Xfire, lol.
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
post #6 of 12

This example is exaggerated and over simplified with 100% perfect scaling;

 

6970 1536 shaders = Card A is faster clock per clock

6950 1408 shaders = Card B

 

In Crossfire;

 

Card A renders Frame #1 = 3ms

Card B renders Frame #2 = 4ms

Card A renders Frame #3 = 3ms

Card B .......

 

6970 + 6950 crossfire produces 2 frames/ 3.5ms

6970 + 6970 crossfire produces 2 frames/ 3.0ms

6950 + 6950 crossfire produces 2 frames/ 4.0ms

 

 


Edited by Ken1649 - 2/1/12 at 7:29pm
ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
ケンジ
(16 items)
 
  
CPUCPUMotherboardGraphics
i7-3960X i7-980X GA-X79-UD7 / GA-X58A-UD9 7970 + 465 
GraphicsRAMRAMHard Drive
2x 6990 + 580 16GB 2133 MHz 24GB 2000 MHz 120GB x 2 RAID0 
Hard DriveHard DriveCoolingCooling
120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
CoolingCoolingOSPower
VID-AR699 EK FB X58A-UD9 Win 7 Ultimate x64 1500W / 1250W+1200W 
  hide details  
Reply
post #7 of 12
Thread Starter 
hmm, maybe i should go with the 2x TFiii after all. just want to be able to run up to pretty damned high settings between 1920x1080 and 5760x1080.
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
Bloom County
(12 items)
 
  
CPUMotherboardGraphicsRAM
AMD Phenom II X6 1090T Crosshair V Formula MSI Radeon HD 6970 LIghtning G. 
Hard DriveOptical DriveOSMonitor
Crucial M4 HP dvd1260 Win 7 Home Premium Viewsonic vx2739wm 
KeyboardPowerCaseAudio
Logitech K350 Thermaltake Black Widow 850w Haf X onboard 
  hide details  
Reply
post #8 of 12
Let me first say, I understand the logic Ken espouses exactly ... however, my guess is that what he says would not be universal wink.gif

I believe that, among other possible variables, the degree to which the driver attempts to evenly distribute the frametimes on the particular application at hand (in order to reduce microstutter) will come into play.

In the end, I think that most of the time, the proposed setup will run 'in between' the performance of 6950x2 and 6970x2 (assuming for simplicities sake that unlocked 6950 = 6970), and occasionally it'll run exactly like 6950x2.

In the latter case, what will happen is that the 6950 will run at 99%, but the 6970 will run at like 92% ... which will ultimately yield the same FPS as 2x6950. IOW, what happens is that the faster card just ends up 'waiting' for the slower card.

One thing I know with relative certainty, though, is that overclocking one of two cards in a multi-gpu set will not improve performance vs. just running both at stock clocks. But that's not inherently the same thing as running two cards with slightly different hardware, so I cannot reliably extrapolate from that observation wink.gif

This all being said ... is there really enough difference in perf between a locked and unlocked 6950 to be worried about it? I see no way that even in the worst case scenario of the setup producing the same FPS as two 'locked' 6950's, that the difference vs. 2 unlocked 6950's would EVER be enough to affect your gameplay experience in any way thumb.gif

Edit: I'll also throw out the fact that these cards are not often really all that 'shader-bound'. If they were, the shader count advantage of the 6970 over the 6950 (with both run at the same clocks) would produce a larger FPS delta ... than it typically does. Which ... gives you even less reason to 'worry about' the discrepancy betwixt the two cards.
Edited by brettjv - 2/1/12 at 1:40pm
    
CPUMotherboardGraphicsRAM
xeon X5675 6-core @ 4.1ghz (1.29v, 20x205 +ht ) rampage iii extreme msi rx470 gaming X (the $159 budget king) 3 x 2gb corsair xms3 pc12800 (9-9-9-24-1T@1600MHz) 
Hard DriveOptical DriveCoolingOS
hynix 250gb ssd (boot), 2tb deskstar (apps),1tb... plextor px-712sa - still the best optical drive... corsair h8o v2 aio W10 home 
MonitorPowerCaseAudio
asus vw266h 25.5" (1920x1200) abs sl (enermax revolution) * single 70A rail 850w silverstone rv-03 XFi Titanium 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
xeon X5675 6-core @ 4.1ghz (1.29v, 20x205 +ht ) rampage iii extreme msi rx470 gaming X (the $159 budget king) 3 x 2gb corsair xms3 pc12800 (9-9-9-24-1T@1600MHz) 
Hard DriveOptical DriveCoolingOS
hynix 250gb ssd (boot), 2tb deskstar (apps),1tb... plextor px-712sa - still the best optical drive... corsair h8o v2 aio W10 home 
MonitorPowerCaseAudio
asus vw266h 25.5" (1920x1200) abs sl (enermax revolution) * single 70A rail 850w silverstone rv-03 XFi Titanium 
  hide details  
Reply
post #9 of 12
See above posts.

Exact performance will be a little up in the air, but they are compatible.
Micro Mule
(11 items)
 
  
CPUMotherboardGraphicsRAM
i7 6700k MSI Z170I Gaming Pro AC Gigabyte GTX 1070 G1 Gaming 16GB GSkill Ripjaws V DDR4 3200 
Hard DriveCoolingMonitorPower
250GB Crucial MX200, 960GB Adata , 1TB WD Black Noctua NH-L12 LG 27UD68 4k Seasonic M12II 620W 
CaseMouseAudio
Corsair Obsidian 250D Logitech Performance Mouse MX Topping TP-30 Mk2, 2x Polk M10, Sony MDR-7506 
  hide details  
Reply
Micro Mule
(11 items)
 
  
CPUMotherboardGraphicsRAM
i7 6700k MSI Z170I Gaming Pro AC Gigabyte GTX 1070 G1 Gaming 16GB GSkill Ripjaws V DDR4 3200 
Hard DriveCoolingMonitorPower
250GB Crucial MX200, 960GB Adata , 1TB WD Black Noctua NH-L12 LG 27UD68 4k Seasonic M12II 620W 
CaseMouseAudio
Corsair Obsidian 250D Logitech Performance Mouse MX Topping TP-30 Mk2, 2x Polk M10, Sony MDR-7506 
  hide details  
Reply
post #10 of 12

Ummmmmmmmmm ? polls_OH_MY_HEAD_HURTS_4332_47269_answer_1_xlarge.jpeg this Post made my head hurt ....
 

Quote:
Originally Posted by brettjv View Post

Let me first say, I understand the logic Ken espouses exactly ... however, my guess is that what he says would not be universal wink.gif
I believe that, among other possible variables, the degree to which the driver attempts to evenly distribute the frametimes on the particular application at hand (in order to reduce microstutter) will come into play.
In the end, I think that most of the time, the proposed setup will run 'in between' the performance of 6950x2 and 6970x2 (assuming for simplicities sake that unlocked 6950 = 6970), and occasionally it'll run exactly like 6950x2.
In the latter case, what will happen is that the 6950 will run at 99%, but the 6970 will run at like 92% ... which will ultimately yield the same FPS as 2x6950. IOW, what happens is that the faster card just ends up 'waiting' for the slower card.
One thing I know with relative certainty, though, is that overclocking one of two cards in a multi-gpu set will not improve performance vs. just running both at stock clocks. But that's not inherently the same thing as running two cards with slightly different hardware, so I cannot reliably extrapolate from that observation wink.gif
This all being said ... is there really enough difference in perf between a locked and unlocked 6950 to be worried about it? I see no way that even in the worst case scenario of the setup producing the same FPS as two 'locked' 6950's, that the difference vs. 2 unlocked 6950's would EVER be enough to affect your gameplay experience in any way thumb.gif
 
Edit: I'll also throw out the fact that these cards are not often really all that 'shader-bound'. If they were, the shader count advantage of the 6970 over the 6950 (with both run at the same clocks) would produce a larger FPS delta ... than it typically does. Which ... gives you even less reason to 'worry about' the discrepancy betwixt the two cards.


Not sure this is what you're trying to say wth.gif ... but I somehow got that you think running X-Fired HD-6970's ( or UNLOCKED & OVERCLOCKED HD-6950's in this case ) will NOT perform BETTER than running X-Fires HD-6950's ( LOCKED & STOCK ) ? IF so kookoo.gif ... I know that CAN'T be what you were saying right ? I hope ... right ? confused.gif
 

IMO ... the OP just needs to OverClock the HECK out of the LOCKED card, as far beyond 880 / 1375 MHz as he can ... and then it should perform VERY CLOSE to the UNLOCKED 880 / 1375 / 1536 = 6950/6970's level of performance thus making a crossfireX setup with these 2 cards maybe what ? 1-2% slower than if they BOTH were UNLOCKED 880 / 1375 / 1536 HD-6950's.


Edited by LA_Kings_Fan - 2/1/12 at 3:33pm
   
LG/Google NEXUS 5
(10 items)
 
CPUMotherboardGraphicsRAM
Q9650 Yorkfield Quad-Core Asus IPIBL-LB (HP Benicia-GL8E) Sapphire TOXIC HD6950 {UnLocked 1536 shaders} 8 GB G. Skill Pi Black DDR2 
Hard DriveOptical DriveCoolingOS
SeaGate Barracuda 1TB 32MB Cache HP - DVD/CD combo Drive Cooler Master  MS Vista Home Premium 64 bit 
MonitorKeyboardPowerCase
HP w2207h Widescreen HP Stock BFG Tech LS-680 HP Pavilion 
Mouse
HP stock 
CPUMotherboardGraphicsRAM
Quad Core Krait 400 @ 2.30GHz  Qualcomm MSM8974(Snapdragon 800) Adreno 330 2GB LPDDR3-1600 
Hard DriveOSMonitorKeyboard
32GB NAND Android 4.4 Kitkat 4.95" 1080X1920 IPS Display Swiftkey 
PowerAudio
2300 mAh Battery Stereo Speakers 
  hide details  
Reply
   
LG/Google NEXUS 5
(10 items)
 
CPUMotherboardGraphicsRAM
Q9650 Yorkfield Quad-Core Asus IPIBL-LB (HP Benicia-GL8E) Sapphire TOXIC HD6950 {UnLocked 1536 shaders} 8 GB G. Skill Pi Black DDR2 
Hard DriveOptical DriveCoolingOS
SeaGate Barracuda 1TB 32MB Cache HP - DVD/CD combo Drive Cooler Master  MS Vista Home Premium 64 bit 
MonitorKeyboardPowerCase
HP w2207h Widescreen HP Stock BFG Tech LS-680 HP Pavilion 
Mouse
HP stock 
CPUMotherboardGraphicsRAM
Quad Core Krait 400 @ 2.30GHz  Qualcomm MSM8974(Snapdragon 800) Adreno 330 2GB LPDDR3-1600 
Hard DriveOSMonitorKeyboard
32GB NAND Android 4.4 Kitkat 4.95" 1080X1920 IPS Display Swiftkey 
PowerAudio
2300 mAh Battery Stereo Speakers 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
  • In X-fire, if one card's shaders are unlocked and it's twin arent, will the shaders for the "set" only run at the unlocked level?
Overclock.net › Forums › Graphics Cards › AMD/ATI › In X-fire, if one card's shaders are unlocked and it's twin arent, will the shaders for the "set" only run at the unlocked level?