Overclock.net › Forums › Graphics Cards › AMD/ATI › PCI-e 3.0 Graphic Card on PCI-e 2.0 motherboard driving five 27" monitors at 1920 x 1080 Eyefinity
New Posts  All Forums:Forum Nav:

PCI-e 3.0 Graphic Card on PCI-e 2.0 motherboard driving five 27" monitors at 1920 x 1080 Eyefinity

post #1 of 7
Thread Starter 
I'm planning to upgrade my current pc of 4 years for gaming purpose. I've done quite a bit of research but couldn't find what i was looking for or maybe i'm just too newbie to put everything together to form a bigger picture. Therefore I'm hoping you guys could help with my questions.

Currently I have a PCI-e 2.0 motherboard (Asus M3A32-MVP Deluxe - http://www.asus.com/Motherboards/AMD_AM2Plus/M3A32MVP_DeluxeWiFiAP/) with 8GB of DDR2 RAM and more than enough power (800w psu). I'm contemplating of purchasing a HD7970 graphic card which is a PCI-e 3.0 card to put into my motherboard and will drive five 27" monitors at 1920 x 1080 resolution using Eyefinity (tricking the OS into thinking that I have ONE very big screen instead of 5). Will such system work without the performance suffer.... much?

I understand that PCI-e 2.0 x16 is capable of 8Gbps bandwidth and PCI-e 3.0 x16 has up to 16Gbps bandwidth. A simple arithmetic calculation gives me the number of bits required to store information of ONE monitor at 1920 x 1080 resolution in 24 bits per pixel (bpp) colour depth of ONE frame.
Code:
1920 * 1080 = 2,073,600 pixels
2,073,600 * 24bpp = 49,766,400 bits

So for the number of bits for 5 monitors
Code:
49,766,400 * 5 = 248,832,000 bits

If I want a smooth 60 frames per second (FPS) it'll be
Code:
248,832,000 * 60 = 14,929,920,000 bits/sec

So the data transfer rate is a whopping 15Gbps and only PCI-e 3.0 can support it nicely.

FIRST QUESTION
What happen if I still plug that card into a PCI-e 2.0 slot? Will the system tune the FPS down automatically (which means my FPS will suffer and drop to about 32 FPS) OR the entire system will fail ultimately (or slowed to a crawl which isn't worth investing in)?

SECOND QUESTION
Can I get two identical graphic cards to distribute the burden (3 monitors on the first card and 2 on the second card)? According to my mobo specification, dual card mode can still achieve x16 lanes each which means the total bandwidth can be increased up to 16Gbps. Will Eyefinity still work (5 monitors combined together to make ONE very large display)? Do I need CrossFire (which i prefer not to due to microstuttering)?, which in this case the configuration will be all 5 monitors on the primary card.

I really hope someone is able to shed some light on my dilemma. Can I just buy a high end card and get a maximum gaming experience, or should I save up and change my entire gaming system? Thanks in advance =)
post #2 of 7
It always worries me when someone says they have a power supply with "more than enough power" but don't name it/have it listed in their rig specs. Please tell me it's not some hunk of garbage.

1. PCIE 3 is backwards compatible with PCIE 2 so there's no issues with putting a PCIE 3 card into a PCIE 2 slot. The only problem, as you mentioned, is less bandwidth but that doesn't make any real world difference since no cards fully utilize PCIE 2 bandwidth to begin with. It's safe to assume that down the line, as cards get more and more powerful, the difference will be more and more noticeable but that may be a while.

2. Of course. It doesn't quite work the way you mentioned though unless you were referring to outputs. IIRC one card will render the first frame, the other card will render the second frame, and they go back and forth distributing the load equally, more or less. Yes, eyefinity will still work and yes, when you use two AMD cards together, that's called crossfire and does require the crossfire bridge for every possible card combination except for a 7770 and 7750 or something along those lines.
Ladder 3
(18 items)
 
First Responders
(14 items)
 
 
CPUMotherboardGraphicsRAM
I5 2500k Asus P8P67 PowerColor Vortex II 7970 Samsung 2x4GB 
Hard DriveHard DriveOptical DriveCooling
WD20EARX Mushkin Enhanced Chronos Deluxe 240GB Samsung CD/DVD Burner Noctua NH-D14 
CoolingOSMonitorPower
8 x AP14s Windows 8 64 bit Dell U2312HM Seasonic X650 
CaseMouseMouse PadAudio
NZXT Switch 810 CM Storm Spawn Puretrak Stealth Asus Xonar DG 
Audio
Beyerdynamic DT 770 Pro 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 620 MSI 770-G45 Asus HD 4870 4GB G.Skill 
Hard DriveOptical DriveCoolingOS
Western Digital Blue 500GB Sony Optiarc Arctic Cooling Freezer 7 Pro Windows 7 
MonitorPowerCaseMouse
Hanns.G HW191A Antec Neo Eco 520 HAF 912 Razer Deathadder Black Edition 
Mouse PadAudio
Steelseries Qck JVC HA-RX 700 
  hide details  
Reply
Ladder 3
(18 items)
 
First Responders
(14 items)
 
 
CPUMotherboardGraphicsRAM
I5 2500k Asus P8P67 PowerColor Vortex II 7970 Samsung 2x4GB 
Hard DriveHard DriveOptical DriveCooling
WD20EARX Mushkin Enhanced Chronos Deluxe 240GB Samsung CD/DVD Burner Noctua NH-D14 
CoolingOSMonitorPower
8 x AP14s Windows 8 64 bit Dell U2312HM Seasonic X650 
CaseMouseMouse PadAudio
NZXT Switch 810 CM Storm Spawn Puretrak Stealth Asus Xonar DG 
Audio
Beyerdynamic DT 770 Pro 
CPUMotherboardGraphicsRAM
AMD Athlon II X4 620 MSI 770-G45 Asus HD 4870 4GB G.Skill 
Hard DriveOptical DriveCoolingOS
Western Digital Blue 500GB Sony Optiarc Arctic Cooling Freezer 7 Pro Windows 7 
MonitorPowerCaseMouse
Hanns.G HW191A Antec Neo Eco 520 HAF 912 Razer Deathadder Black Edition 
Mouse PadAudio
Steelseries Qck JVC HA-RX 700 
  hide details  
Reply
post #3 of 7
You're gonna need 2 cards to ever reach 60 fps in any game that's even relatively new, 5 1080p displays is over 10 million pixels
ivybeech
(21 items)
 
4K-HTPC
(12 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 6700k@4.7ghz Gigabyte z170xp-sli Nvidia GTX 1080Ti 16gb Team Xtreem DDR4 @16/18/18/37 3333mhz 
Hard DriveHard DriveHard DriveHard Drive
256gb M4 SSD boot 4TB Seagate - Raid 0 4TB Seagate - Raid 0 2TB Western Digital Green for storage 
Hard DriveHard DriveHard DriveHard Drive
5TB Seagate 3 tb Seagate  2TB Seagate 4TB of various external storage 
CoolingOSMonitorMonitor
Corsair H100 in push/pull Windows 10 pro ASUS ROG Swift PG278Q 27" OC Catleap Q270SE IPS 2560x1440@120hz 
KeyboardPowerCaseMouse
Xarmor mechanical cherry mx-brown Hale90 1000w 80+gold EVGA DG-87 Logitech G502 
CPUMotherboardGraphicsRAM
Intel i5-2400 Intel DP67BG Nvidia GTX 950 8gb Gskill Ripjaws 1600mhz ddr3 
Hard DriveOptical DriveCoolingOS
256gb samsung SSD Asus Blu-ray Drive Model BC-12B1ST/BLK/B/AS Corsair H50 push/pull Windows 7 Professional 
MonitorPowerCase
Vizio m60-c3 - 3840x2160 OCZ ZT 750w Silverstone Grandia gd-05 
  hide details  
Reply
ivybeech
(21 items)
 
4K-HTPC
(12 items)
 
 
CPUMotherboardGraphicsRAM
Intel i7 6700k@4.7ghz Gigabyte z170xp-sli Nvidia GTX 1080Ti 16gb Team Xtreem DDR4 @16/18/18/37 3333mhz 
Hard DriveHard DriveHard DriveHard Drive
256gb M4 SSD boot 4TB Seagate - Raid 0 4TB Seagate - Raid 0 2TB Western Digital Green for storage 
Hard DriveHard DriveHard DriveHard Drive
5TB Seagate 3 tb Seagate  2TB Seagate 4TB of various external storage 
CoolingOSMonitorMonitor
Corsair H100 in push/pull Windows 10 pro ASUS ROG Swift PG278Q 27" OC Catleap Q270SE IPS 2560x1440@120hz 
KeyboardPowerCaseMouse
Xarmor mechanical cherry mx-brown Hale90 1000w 80+gold EVGA DG-87 Logitech G502 
CPUMotherboardGraphicsRAM
Intel i5-2400 Intel DP67BG Nvidia GTX 950 8gb Gskill Ripjaws 1600mhz ddr3 
Hard DriveOptical DriveCoolingOS
256gb samsung SSD Asus Blu-ray Drive Model BC-12B1ST/BLK/B/AS Corsair H50 push/pull Windows 7 Professional 
MonitorPowerCase
Vizio m60-c3 - 3840x2160 OCZ ZT 750w Silverstone Grandia gd-05 
  hide details  
Reply
post #4 of 7
Thread Starter 
Quote:
Originally Posted by Gr0ve View Post

It always worries me when someone says they have a power supply with "more than enough power" but don't name it/have it listed in their rig specs. Please tell me it's not some hunk of garbage.
1. PCIE 3 is backwards compatible with PCIE 2 so there's no issues with putting a PCIE 3 card into a PCIE 2 slot. The only problem, as you mentioned, is less bandwidth but that doesn't make any real world difference since no cards fully utilize PCIE 2 bandwidth to begin with. It's safe to assume that down the line, as cards get more and more powerful, the difference will be more and more noticeable but that may be a while.
2. Of course. It doesn't quite work the way you mentioned though unless you were referring to outputs. IIRC one card will render the first frame, the other card will render the second frame, and they go back and forth distributing the load equally, more or less. Yes, eyefinity will still work and yes, when you use two AMD cards together, that's called crossfire and does require the crossfire bridge for every possible card combination except for a 7770 and 7750 or something along those lines.

Thanks for the clarification. When i'm using two AMD cards together, I can choose not to CrossFire them right? If they were not CrossFired, will Eyefinity still work (5 monitors = 1 big screen) with probably 3 monitors on the first card and 2 monitors on the second?
post #5 of 7
Quote:
Originally Posted by jason2k View Post

Thanks for the clarification. When i'm using two AMD cards together, I can choose not to CrossFire them right? If they were not CrossFired, will Eyefinity still work (5 monitors = 1 big screen) with probably 3 monitors on the first card and 2 monitors on the second?

you cant choose not to crossfire,especially when doing 5xeyefinity

2x cards only work to display things on screen if they are CF
5th Element
(16 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma ASRock 970 EXTREME3 VisionTek Radeon HD 5850 Vengeance 2x4gb 1600 
Hard DriveHard DriveCoolingOS
wd velociraptor samsung 830 coolermaster v8 windows 7 ultimate 
MonitorMonitorKeyboardPower
Acer G235H westinghouse 19" cheapo Thermaltake TR2 W0070RUC 430W  
CaseMouseMouse PadOther
NZXT Tempest 410 Elite logitech mk 700 razer goliathus  Nzxt Hue 
  hide details  
Reply
5th Element
(16 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma ASRock 970 EXTREME3 VisionTek Radeon HD 5850 Vengeance 2x4gb 1600 
Hard DriveHard DriveCoolingOS
wd velociraptor samsung 830 coolermaster v8 windows 7 ultimate 
MonitorMonitorKeyboardPower
Acer G235H westinghouse 19" cheapo Thermaltake TR2 W0070RUC 430W  
CaseMouseMouse PadOther
NZXT Tempest 410 Elite logitech mk 700 razer goliathus  Nzxt Hue 
  hide details  
Reply
post #6 of 7
also you should list out your specs, with a mobo that has ddr2 ram i can assume your running an older cpu, which may be a big bottleneck at running 5x 1080p eyefinity
what are you trying to get out of this system, just games? what kind? any editing of any kind? might want to think about 3x eyfinity and upgrading the rest of your rig with those video cards
5th Element
(16 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma ASRock 970 EXTREME3 VisionTek Radeon HD 5850 Vengeance 2x4gb 1600 
Hard DriveHard DriveCoolingOS
wd velociraptor samsung 830 coolermaster v8 windows 7 ultimate 
MonitorMonitorKeyboardPower
Acer G235H westinghouse 19" cheapo Thermaltake TR2 W0070RUC 430W  
CaseMouseMouse PadOther
NZXT Tempest 410 Elite logitech mk 700 razer goliathus  Nzxt Hue 
  hide details  
Reply
5th Element
(16 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X4 960T Zosma ASRock 970 EXTREME3 VisionTek Radeon HD 5850 Vengeance 2x4gb 1600 
Hard DriveHard DriveCoolingOS
wd velociraptor samsung 830 coolermaster v8 windows 7 ultimate 
MonitorMonitorKeyboardPower
Acer G235H westinghouse 19" cheapo Thermaltake TR2 W0070RUC 430W  
CaseMouseMouse PadOther
NZXT Tempest 410 Elite logitech mk 700 razer goliathus  Nzxt Hue 
  hide details  
Reply
post #7 of 7
Quote:
Originally Posted by jason2k View Post

Thanks for the clarification. When i'm using two AMD cards together, I can choose not to CrossFire them right? If they were not CrossFired, will Eyefinity still work (5 monitors = 1 big screen) with probably 3 monitors on the first card and 2 monitors on the second?


5 screen eyefinity will work on on one card if its an eyefinity 6 version card. (videocards that have 6 displayports)
However the 2nd videocard will not be helping in any rendering but you can use it for other tasks such as Boinc, folding or bitcoin mining.


If you truly want to use one card for 3 screens and another card for 2 screens, you can use a different software called softTH but again all the rendering will be done by the first videocard.
Rabasu i7-3770K
(13 items)
 
Rabasu FX6100
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 3770K ECS H77H2-M3 MSI RX 580 Armor 8GB OC 2x8GB Kingston HyperX Blu 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW stock 
OSMonitorPowerCase
Windows 7 x64 BenQ E2220 1080p Seasonic M12II Evo 620W Coolermaster Elite 430 
Mouse
A4tech X7 710BH 
CPUMotherboardGraphicsRAM
AMD FX 6100 4.0 Ghz 6-core Asus M5A78L-MLX3 AM3+ Powercolor HD7730 1GB DDR5 16GB (2x8GB) Corsair Vengeance LP 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW CoolerMaster Hyper212+ with 2x140mm Deepcool UF140 
OSMonitorPowerCase
Windows 7 x64 / Mint x64 BenQ E2220 1080p Aerocool Strike-X 500watts CoolerMaster Elite 430 
Mouse
A4tech X7 710BH 
CPUGraphicsRAMHard Drive
A8 7410 2.5Ghz Radeon R5 M335 2GB 4GB DDR3L 1 TB HDD 
OSCase
Windows 8.1 Dell Inspiron 5455 
  hide details  
Reply
Rabasu i7-3770K
(13 items)
 
Rabasu FX6100
(13 items)
 
 
CPUMotherboardGraphicsRAM
i7 3770K ECS H77H2-M3 MSI RX 580 Armor 8GB OC 2x8GB Kingston HyperX Blu 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW stock 
OSMonitorPowerCase
Windows 7 x64 BenQ E2220 1080p Seasonic M12II Evo 620W Coolermaster Elite 430 
Mouse
A4tech X7 710BH 
CPUMotherboardGraphicsRAM
AMD FX 6100 4.0 Ghz 6-core Asus M5A78L-MLX3 AM3+ Powercolor HD7730 1GB DDR5 16GB (2x8GB) Corsair Vengeance LP 1600 
Hard DriveHard DriveOptical DriveCooling
Seagate 1TB Seagate 1TB Sony DVDRW CoolerMaster Hyper212+ with 2x140mm Deepcool UF140 
OSMonitorPowerCase
Windows 7 x64 / Mint x64 BenQ E2220 1080p Aerocool Strike-X 500watts CoolerMaster Elite 430 
Mouse
A4tech X7 710BH 
CPUGraphicsRAMHard Drive
A8 7410 2.5Ghz Radeon R5 M335 2GB 4GB DDR3L 1 TB HDD 
OSCase
Windows 8.1 Dell Inspiron 5455 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD/ATI
Overclock.net › Forums › Graphics Cards › AMD/ATI › PCI-e 3.0 Graphic Card on PCI-e 2.0 motherboard driving five 27" monitors at 1920 x 1080 Eyefinity