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6970x2 or 6990? - Page 8

post #71 of 74
Quote:
Originally Posted by FrostyFoxxy View Post
Ok, the RX360 kit would be nice, but I'm not sure where I would put it in my case as I don't think my case is big enough.

Also, where do I get waterblocks for my GPU's?
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CPUMotherboardGraphicsGraphics
i7 980X @4.6ghz 1.43vcore Asus Rampage III Extreme Sapphire 6990 1000/1400 Powercolor 6990 1000/1400 
RAMHard DriveHard DriveHard Drive
12GB G.Skill Ripjaw 1600 SSD: Intel X-25M 160GB G2 (OS) HDD:4x2TB Hitachi Deskstar HDD:2x1TB Samsung F1 
Optical DriveCoolingCoolingCooling
LG Thingy Reservoir: FrozenQ 400ml T-Virus Pump: Swiftech MCP655 w/BP mod top Radiator: Phobya G-Changer 480 version 1.2 black 
CoolingCoolingCoolingCooling
CPU: AC Cuplex Kryos HF Radiator: XSPC GTX 480 GPU:2xSwiftech Epsilon 6990 8x Scythe Gentle Typhoon AP-15 
OSMonitorMonitorKeyboard
Windows 7 64 bit Home Premium 3x28" Hanns-OhGee (5760x1200)Eyefinity 42" (1920x1080) 120Hz LCD TV Xarmor U9BL-S 
PowerCaseMouseMouse Pad
Enermax Galaxy Evolution 1250W Banchetto 101 Roccat Kone [+] Roccat Alumic 
AudioOther
Soundcard: Asus Xonar Essence ST Headphone: Audio Technica ATH-A900 
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i7 920 CO 4.0ghz Asus Rampage II Extreme Sapphire 5970 Oc Edition 6GB Skill 1600mhz 
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3GB Corsais XMS3 1333mhz WD 640GB Silver Arrow Windows 7 64 bit Home Premium 
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KDS 26" 1920x1200 2x 25" I-Inc 1920x1080 Logitech G15 ver2 Thermaltake Toughpower 700w 
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6
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CPUMotherboardGraphicsGraphics
i7 980X @4.6ghz 1.43vcore Asus Rampage III Extreme Sapphire 6990 1000/1400 Powercolor 6990 1000/1400 
RAMHard DriveHard DriveHard Drive
12GB G.Skill Ripjaw 1600 SSD: Intel X-25M 160GB G2 (OS) HDD:4x2TB Hitachi Deskstar HDD:2x1TB Samsung F1 
Optical DriveCoolingCoolingCooling
LG Thingy Reservoir: FrozenQ 400ml T-Virus Pump: Swiftech MCP655 w/BP mod top Radiator: Phobya G-Changer 480 version 1.2 black 
CoolingCoolingCoolingCooling
CPU: AC Cuplex Kryos HF Radiator: XSPC GTX 480 GPU:2xSwiftech Epsilon 6990 8x Scythe Gentle Typhoon AP-15 
OSMonitorMonitorKeyboard
Windows 7 64 bit Home Premium 3x28" Hanns-OhGee (5760x1200)Eyefinity 42" (1920x1080) 120Hz LCD TV Xarmor U9BL-S 
PowerCaseMouseMouse Pad
Enermax Galaxy Evolution 1250W Banchetto 101 Roccat Kone [+] Roccat Alumic 
AudioOther
Soundcard: Asus Xonar Essence ST Headphone: Audio Technica ATH-A900 
CPUMotherboardGraphicsRAM
i7 920 CO 4.0ghz Asus Rampage II Extreme Sapphire 5970 Oc Edition 6GB Skill 1600mhz 
RAMHard DriveCoolingOS
3GB Corsais XMS3 1333mhz WD 640GB Silver Arrow Windows 7 64 bit Home Premium 
MonitorMonitorKeyboardPower
KDS 26" 1920x1200 2x 25" I-Inc 1920x1080 Logitech G15 ver2 Thermaltake Toughpower 700w 
CaseMouseMouse PadAudio
HAF932 Logitech G9X WolfKing X-Fi 
CPUGraphicsHard DriveOS
i7-4710Q GTX 860M 4GB Samsung Evo 850 1TB Windows 10 
MonitorAudio
15.6" 4K (3840 x 2160) JBL Audio 
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post #72 of 74
Quote:
Originally Posted by Xeoc View Post
More power phases would not give him more performance, It would let him overclock higher though.
You say that, But I haven't seen 6970's overclocking like the 6990 can
post #73 of 74
Quote:
Originally Posted by HiLuckyB View Post
You say that, But I haven't seen 6970's overclocking like the 6990 can
It's cuz the 6990 silicon is cherry picked dude, however I've no idea the argument atm. More vrms = more stable overclock, not necessarily higher overclock.
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post #74 of 74
Quote:
Originally Posted by tsm106 View Post
It's cuz the 6990 silicon is cherry picked dude, however I've no idea the argument atm. More vrms = more stable overclock, not necessarily higher overclock.
This is right. Although a peak overclock of, per example, 1000 MHz on a 6990 may be less stable than peak 975 of a single Cayman..dropping the 6990 to 975 more often than not would improve stability ten fold.

Simply put, there's a balance (on average) that more or less equates the capabilities of a 6990 & 6970. I've found the overall power delivery & clock capacity of the 6990, thanks in part to efficiency owed to the cherry picked Caymans on-board, to be far superior to my former 6970 cards. All of which were underwater.

Let's not forget the PLX 48-lane PCI-E bridge, either. Many of the PLX features that very seriously optimize frame synchronization, gpu to gpu bandwidth, gpu to cpu bandwidth, et al. are both emulated & (in some cases) superior to the PW Short & Broadcast features of the NF-200 Nvidia bridge. http://www.plxtech.com/products/expresslane/pex8647. The main reason I switched from 6970s to 6990s was this function, which cleans up PCI-E bandwidth big time. I've seen marked improvements relative to my former setup, so I'm satisfied with the choice.
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i7 - 2600K / 5.4 GHz Gigabyte P67A-UD7-B3 #2 Sapphie Radeon 6990 @ 1030 / 1520 Ripjaws 4GB x 4 (16GB) @ 2200 MHz 
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