Overclock.net › Forums › Graphics Cards › NVIDIA › GX2 vs 2x GX2
New Posts  All Forums:Forum Nav:

GX2 vs 2x GX2 - Page 4

post #31 of 44
Quote:
Originally Posted by brettjv View Post
I frankly would be very surprised if the OS sees anything other than the 512MB of RAM that's present on each physical card. There's no reason I can think of that these cards would expose more memory addresses than the total VRAM capacity, which in this scenario is 512MB. Do you have some form of verification for this theory? Not to put you on the spot or call you incorrect, I've just never heard of such a thing, so I'm curious where you learned this?
After installing 2 GX2s in Vista 32 with 4Gb of RAM installed the OS reported that I had 1.7? of system RAM.
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
post #32 of 44
Thread Starter 
Quote:
Originally Posted by hoser1869 View Post
if its a driver issue how come not everyone is having this problem? guys like maxishine and trubritar are getting crazy numbers....yea they have better machines but wouldnt they be suffering too if it was a driver issue?? just asking...
Not necessarily they are using 790i chipset. Seems the problem is isolated with 780i users.

Talking of the 780i i did notice something about my GX2's when installed. The bottom card sits higher at the back of the card (power inputs end) than the top card. Although it is fully inserted it just bothers me.....get a ruler and check it out for yourself. I'm sure it's a design flaw....
 
X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
  hide details  
Reply
 
X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
  hide details  
Reply
post #33 of 44
Quote:
Originally Posted by Litlratt View Post
After installing 2 GX2s in Vista 32 with 4Gb of RAM installed the OS reported that I had 1.7? of system RAM.
And what does it say if you put in one GX2, I wonder?

How about if you if you only put in 2G of ram?
    
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 #34 of 44
Quote:
Originally Posted by Mhill2029 View Post
Not necessarily they are using 790i chipset. Seems the problem is isolated with 780i users.

Talking of the 780i i did notice something about my GX2's when installed. The bottom card sits higher at the back of the card (power inputs end) than the top card. Although it is fully inserted it just bothers me.....get a ruler and check it out for yourself. I'm sure it's a design flaw....
I've been noticing in reviews that the 790i's with ddr3 are showing significant performance improvements over earlier chipsets, even those with ddr3 ... greatly reduced overall memory latencies, both from the ddr3 and from the way the northbridge is programmed (lower Trd values or something along those lines). Looks like ddr3 is finally showing the perf improvements everyone has been hoping to see.
    
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 #35 of 44
Quote:
Originally Posted by brettjv View Post
And what does it say if you put in one GX2, I wonder?

How about if you if you only put in 2G of ram?
I don't know.
That was with a 780i mobo. While I was waiting for my 790i, I ordered a 64 bit disc for that version of Vista also.
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
post #36 of 44
Thread Starter 
Quote:
Originally Posted by brettjv View Post
I've been noticing in reviews that the 790i's with ddr3 are showing significant performance improvements over earlier chipsets, even those with ddr3 ... greatly reduced overall memory latencies, both from the ddr3 and from the way the northbridge is programmed (lower Trd values or something along those lines). Looks like ddr3 is finally showing the perf improvements everyone has been hoping to see.
I really don't want to go DDR3 for one reason, Nehalem. Because by the time that chip is released all current DDR3 will look crap. I think we will be seeing in excess of 2.2Ghz DDR3 by then.

Hows your performance LitlRatt?
 
X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
  hide details  
Reply
 
X79 Build
(13 items)
 
 
CPUMotherboardGraphicsRAM
Intel Core i7-6950X @ 4.0Ghz Asus Rampage V Extreme [Bios:3101] 2x EVGA GeForce Titan X SC Editions in SLI 32GB (4×8) Corsair Dominator Platinums (3000Mhz) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 950 Pro 512GB M.2 Nvme 2x 256GB Vertex 4 SSD (RAID-0) 2x 2TB Seagate Barracuda [Storage] Pioneer BDR-207DBK Blu-ray Writer 
CoolingOSMonitorPower
Corsair H105 (Push/Pull) Windows 10 Pro x64 2x 27" Asus PG278Q ROG Swift 144hz  Corsair AX1500i Digital ATX 80 Plus Titanium 
CaseAudio
Lian Li PC-O8WX ATX Cube Case Logitech Z906 5.1 Surround 
CPUMotherboardGraphicsRAM
i7-3930K (C2) @ (4.6Ghz) Asus Rampage IV Extreme X79 (Bios 3204) 3x EVGA GTX780Ti's SC Editions 32GB (4x8GB) G-Skill TridentX 2400Mhz 
Hard DriveHard DriveOptical DriveCooling
2x 256GB OCZ Vertex 4's (RAID-0) 2x 2TB Seagate Barracuda 7200.14 64MB Cache Pioneer BDR-207DBK Blu-ray Writer Corsair H105 (Push/Pull) 
OSMonitorPowerCase
Win7 Pro 64Bit & Win10 Pro 64Bit Asus ROG Swift (2560x1440 @144hz) Corsair AX1200 + Corsair RED sleeved cables Coolermaster Cosmos II Ultra 
  hide details  
Reply
post #37 of 44
Quote:
Originally Posted by Mhill2029 View Post
I really don't want to go DDR3 for one reason, Nehalem. Because by the time that chip is released all current DDR3 will look crap. I think we will be seeing in excess of 2.2Ghz DDR3 by then.

Hows your performance LitlRatt?
I wasn't trying to talk you into it or anything, just making an observation and pointing out that the score differences may very well come down to superior platform performance as opposed to some actual defect in the 780i
    
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 #38 of 44
Well I'm in a position to test your theory, I have pretty much an identical setup to Mhill and now a 790i with some DDR3 to swap out the 780i. Also seeing the same performance issues with quad SLI.

After much research and talking with the actual distributors we did find one source of the issues, which comes from a few strange bugs with vista updates installed prior to SP1, to fix the problem I did a clean install then installed SP1 before anything else.

Also installing one card with drivers, then adding the second card and installing drivers somehow improved the performance also. The very fact this is possible shows how unreliable the drivers currently are.

So how should I do this test, I want to make sure it's as objective as possible, it could serve as proof that the 780i based boards have a serious issue that needs to be addressed.
post #39 of 44
Quote:
Originally Posted by Mhill2029 View Post
I really don't want to go DDR3 for one reason, Nehalem. Because by the time that chip is released all current DDR3 will look crap. I think we will be seeing in excess of 2.2Ghz DDR3 by then.

Hows your performance LitlRatt?
At this point, I'm not impressed with it. 1800 Mhz but with cas8 timings.
I haven't started tweaking it yet, so maybe there's a little hope, but I'm not expecting much.
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
Trouble
(13 items)
 
  
CPUMotherboardGraphicsRAM
QX9650 EVGA 790i@P07 3X EVGA GTX280 4X 1GB OCZ DDR3 14400 
Hard DriveOptical DriveOSMonitor
2X 74GB Raptor Raid 0/(2)2X WD320 Raid 0 2X Samsung 18XDVDRW XP32/ViPre64/ViBas64 Dell 3007WFP 
KeyboardPowerCaseMouse
Saitek Cyborg TT TP 1200W Lian-Li 343B MS TBall Optical/MX Revolution 
  hide details  
Reply
post #40 of 44
No testing of our own is necessary ...

Anandtech has done it for us.

Here's the first page of the actual benches in this article, and the spanking delivered by the 790i and x48 chipsets over the previous generation are actually pretty stunning as you go through all the benches they performed.

This quote pretty much sums up the gist of the article:
As we can see, DDR3 motherboards based on NVIDIA 790i or Intel X48 chipsets score well above those that use DDR2 modules. Clearly, the additional memory read bandwidth and reduced access latencies associated with the faster DDR3 subsystems have a distinct affect on overall system performance. This is worth keeping in mind when it comes to buying your next motherboard - DDR3 prices continue to fall every day and we would argue that these once overly expensive products are now almost within the realm of affordability.

http://www.anandtech.com/mb/showdoc.aspx?i=3283&p=6
    
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
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: NVIDIA
Overclock.net › Forums › Graphics Cards › NVIDIA › GX2 vs 2x GX2