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Review: Intel Core 2 Extreme QX6800 - quad-core at almost 3GHz

by Tarinder Sandhu on 9 April 2007, 05:01

Tags: Core 2 Extreme QX6800, Intel (NASDAQ:INTC)

Quick Link: HEXUS.net/qaidp

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System setup and notes

System Intel LGA775 system AMD AM2 system
Processors Intel Core 2 Extreme QX6800 (2.93GHz, 8MiB L2 cache, LGA775, quad-core)
Intel Core 2 Extreme Q6700 (2.67GHz, 8MiB L2 cache, LGA775, quad-core)
Intel Core 2 Extreme X6800 (2.93GHz, 4MiB L2 cache, LGA775, dual-core)
Intel Core 2 Duo E6700 (2.67GHz, 4MiB L2 cache, LGA775, dual-core)
Intel Core 2 Duo E6400 (2.13GHz, 2MiB L2 cache, LGA775, dual-core)
AMD Athlon 64 X2 6000+ (3.0GHz, 2MiB L2 cache, AM2, dual-core)
AMD Athlon 64 X2 5600+ (2.8GHz, 2MiB L2 cache, AM2, dual-core)
AMD Athlon 64 X2 5200+ (2.6GHz, 2MiB L2 cache, AM2, dual-core)
Motherboard Intel D975XBX2 Bad Axe 2 rev. 303 (Intel i975X) ASUS M2N32-SLI Premium Vista Edition (nForce 590 SLI)
Memory 2GiB (2 x 1024) Corsair PC8500 2GiB (2 x 1024) Patriot PC8000 XBLK
Memory timings and speed 4-4-4-12 @ 800MHz (PC6400)
Graphics card(s) Radeon X1900 XTX 512MiB
Disk drive(s) Seagate 160GB SATAII (ST3160812AS)
Optical drive(s) Sony DW-Q30A
BIOS revision 15/03/07 (BX97520J.86A.2674.2007.0315.1546) 01/02/0 (0109)
Mainboard software Intel Inf 8.0.1.1002 NVIDIA nForce Package 9.34
Graphics driver CATALYST 6.10 BETA
Operating System Windows XP Pro SP2 32-bit
PSU OCZ GameXStream 700W
Monitor Dell 2405FPW


Here's what we evaluated the processors with:

Software

Benchmarks Sandra Lite 2k7 SP1 Build 2007.8.10.105 Float Buffered Memory Bandwidth
ScienceMark 2.0 32-bit Build 21MAR05 Memory Latency
CPU-Z v1.39
HEXUS Pifast
LAME multi-threaded benchmark - 701.5MB file - encoded into 128kbps stereo.
DivX 6.4 (existing DV-avi source-file, Home-theatre profile, 1700Kbps, Insane-quality video, 40Kbps, Stereo, 16KHz Audio)
Cinebench 2003 R9.5
POV-Ray 32-bit 3.7.0 BETA 16 - Use internal benchmark mode - biscuit.pov
Far Cry 1.33 (low-end script - 1024x768)
Quake 4 1.30 SMP Support Enabled (low-end script - 1024x768 - demo001 recorded by HEXUS)
Splinter Cell: Chaos Theory 1.05 (low-end script - 1024x768)


Pricing thoughts

Processor Intel Core 2 Extreme QX6800 Intel Core 2 Quad Q6700 Intel Core 2 Extreme X6800 Intel Core 2 Duo E6700 Intel Core 2 Duo E6400 AMD Athlon 64 X2 6000+ AMD Athlon 64 X2 5600+ AMD Athlon 64 X2 5200+
Pricing as at 11/04/07 £630 ? £615 £315 £150 £155 £115 £110


Intel's quad-core CPUs currently occupy the high-end performance space and they're priced accordingly; you need some return on investing in 542m transistors, right? As a consequence and with due acknowledgement of AMD's price cutting in recent months, comparing the Core 2 Extreme QX6800 against any of AMD's desktop CPUs isn't possible on a pure price basis.

The above table shows that having an Extreme CPU requires 'E'xtremely deep pockets, so, really, the ideal comparison for AMD's Athlon 64 X2 6000+, should you wish to make it, is the Intel Core 2 Duo E6700.

(Update - 10/04/07) - AMD has further slashed prices on its X2 series of CPUs. The range-topping X2 6000+ is now available for just £155.

Please, please bear the relative prices in mind when comparing results.

We've not included the results from our Quad-FX testing, however. Our sample box was built by AMD and featured a BIOS that was some way from final. Consequently, results obtained from that testing may not be indicative of current performance. Quad-FX, really, is a work in progress and technology showcase for AMD.