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9900K ES vs 9700K

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I can get a used 9700K for ~280€ where I live or an engineering sample 9900K (QQBY) for ~300€. Which is the better option for gaming at 1440p?

 

I don't care about warranty. Do not consider it a factor in your recommendation, please.

 

I also don't want to hear about how much better value Ryzen are.

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what games and what graphics card?

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: HP EX920 1TB PCIe x4 M.2 SSD + Crucial MX500 1TB 2.5" SATA SSD, 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally, 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172) left outside Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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Don't buy QQBY. It's a essentially an early 9900K on P0 stepping, with anecdotal evidence suggesting an AVX offset bug (-1 or default to base clock) since 2018/02 microcode and a conflict with certain PCIe devices. Find a QQZ4 if possible. It's on R0 stepping which fix those issues.

 

In general those ES chips are clocked lower than retail chip (QQZ4: 3.1 - 4.5, 9900K: 3.6 - 5.0), but since QQBY/QQZ4 is unlocked, you can manually overclocked it to match the retail chip.

"Mankind’s greatest mistake will be its inability to control the technology it has created."

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On 3/3/2020 at 3:24 PM, SkyHound0202 said:

Don't buy QQBY. It's a essentially an early 9900K on P0 stepping, with anecdotal evidence suggesting an AVX offset bug (-1 or default to base clock) since 2018/02 microcode and a conflict with certain PCIe devices. Find a QQZ4 if possible. It's on R0 stepping which fix those issues.

 

In general those ES chips are clocked lower than retail chip (QQZ4: 3.1 - 4.5, 9900K: 3.6 - 5.0), but since QQBY/QQZ4 is unlocked, you can manually overclocked it to match the retail chip.

Thanks for the reply. I'll look for the QQZ4 and if I can't find one I'll settle for a 9700K

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